/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/test/hard1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:46:53,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:46:53,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:46:53,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:46:53,715 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:46:53,748 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:46:53,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:46:53,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:46:53,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:46:53,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:46:53,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:46:53,752 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:46:53,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:46:53,752 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:46:53,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:46:53,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:46:53,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:46:53,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:46:53,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:46:53,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:46:53,754 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:46:53,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:46:53,754 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:46:53,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:46:53,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:46:53,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:46:53,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:46:53,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:46:53,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:46:53,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:46:53,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:46:53,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:46:53,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:46:53,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:46:53,756 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:46:53,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:46:53,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:46:54,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:46:54,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:46:54,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:46:54,053 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:46:54,054 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:46:54,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2021-07-09 18:46:54,055 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2021-07-09 18:46:54,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:46:54,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:46:54,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:46:54,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:46:54,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:46:54,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:46:54" (1/1) ... [2021-07-09 18:46:54,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:46:54" (1/1) ... [2021-07-09 18:46:54,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:46:54,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:46:54,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:46:54,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:46:54,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:46:54" (1/1) ... [2021-07-09 18:46:54,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:46:54" (1/1) ... [2021-07-09 18:46:54,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:46:54" (1/1) ... [2021-07-09 18:46:54,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:46:54" (1/1) ... [2021-07-09 18:46:54,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:46:54" (1/1) ... [2021-07-09 18:46:54,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:46:54" (1/1) ... [2021-07-09 18:46:54,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:46:54" (1/1) ... [2021-07-09 18:46:54,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:46:54,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:46:54,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:46:54,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:46:54,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:46:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:46:54,196 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:46:54,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:46:54,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:46:54,197 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:46:54,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:46:54,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:46:54,197 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:46:54,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:46:54,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:46:54,198 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:46:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:46:54,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:46:54,198 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 18:46:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 18:46:54,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 18:46:54,199 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:46:54,450 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:46:54,450 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:46:54,452 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:46:54 BoogieIcfgContainer [2021-07-09 18:46:54,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:46:54,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:46:54,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:46:54,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:46:54,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:46:54" (1/2) ... [2021-07-09 18:46:54,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7daa0f78 and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:46:54, skipping insertion in model container [2021-07-09 18:46:54,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:46:54" (2/2) ... [2021-07-09 18:46:54,458 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2021-07-09 18:46:54,479 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:46:54,479 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:46:54,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:46:54,480 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:46:54,557 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 18:46:54,574 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-09 18:46:54,596 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:46:54,596 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:46:54,596 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:46:54,598 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:46:54,599 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:46:54,599 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:46:54,599 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:46:54,599 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:46:54,612 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-07-09 18:46:54,674 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:54,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:54,702 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:54,702 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2030693196, now seen corresponding path program 1 times [2021-07-09 18:46:54,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:54,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827283266] [2021-07-09 18:46:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:54,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:54,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827283266] [2021-07-09 18:46:54,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827283266] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:46:54,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:46:54,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:46:54,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432071732] [2021-07-09 18:46:54,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:46:54,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:54,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:46:54,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:46:54,936 INFO L87 Difference]: Start difference. First operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:54,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:54,996 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-07-09 18:46:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:46:54,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:54,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:55,027 INFO L225 Difference]: With dead ends: 854 [2021-07-09 18:46:55,027 INFO L226 Difference]: Without dead ends: 823 [2021-07-09 18:46:55,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:46:55,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-07-09 18:46:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-07-09 18:46:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-07-09 18:46:55,130 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-07-09 18:46:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:55,131 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-07-09 18:46:55,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:55,131 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-07-09 18:46:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:46:55,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:55,136 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] [2021-07-09 18:46:55,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:46:55,137 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:55,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1569931572, now seen corresponding path program 1 times [2021-07-09 18:46:55,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:55,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929477852] [2021-07-09 18:46:55,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:55,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:55,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929477852] [2021-07-09 18:46:55,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929477852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:55,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742345970] [2021-07-09 18:46:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:55,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:46:55,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:55,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742345970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:55,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:55,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-09 18:46:55,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302807452] [2021-07-09 18:46:55,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:46:55,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:55,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:46:55,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:46:55,364 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2021-07-09 18:46:55,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:55,498 INFO L93 Difference]: Finished difference Result 1573 states and 5792 transitions. [2021-07-09 18:46:55,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:46:55,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:46:55,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:55,510 INFO L225 Difference]: With dead ends: 1573 [2021-07-09 18:46:55,510 INFO L226 Difference]: Without dead ends: 1573 [2021-07-09 18:46:55,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:46:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-07-09 18:46:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 863. [2021-07-09 18:46:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.960556844547564) internal successors, (3414), 862 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 3414 transitions. [2021-07-09 18:46:55,558 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 3414 transitions. Word has length 21 [2021-07-09 18:46:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:55,558 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 3414 transitions. [2021-07-09 18:46:55,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2021-07-09 18:46:55,559 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 3414 transitions. [2021-07-09 18:46:55,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:46:55,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:55,563 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] [2021-07-09 18:46:55,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 18:46:55,777 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:55,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1649103282, now seen corresponding path program 1 times [2021-07-09 18:46:55,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:55,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392310938] [2021-07-09 18:46:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:55,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:55,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392310938] [2021-07-09 18:46:55,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392310938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:55,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70133655] [2021-07-09 18:46:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:55,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:46:55,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:55,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70133655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:55,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:55,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-09 18:46:55,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143244770] [2021-07-09 18:46:55,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:46:55,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:55,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:46:55,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:46:55,964 INFO L87 Difference]: Start difference. First operand 863 states and 3414 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:56,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:56,070 INFO L93 Difference]: Finished difference Result 1748 states and 6572 transitions. [2021-07-09 18:46:56,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:46:56,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:46:56,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:56,083 INFO L225 Difference]: With dead ends: 1748 [2021-07-09 18:46:56,083 INFO L226 Difference]: Without dead ends: 1748 [2021-07-09 18:46:56,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:46:56,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-07-09 18:46:56,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 927. [2021-07-09 18:46:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 3.970842332613391) internal successors, (3677), 926 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 3677 transitions. [2021-07-09 18:46:56,130 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 3677 transitions. Word has length 21 [2021-07-09 18:46:56,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:56,130 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 3677 transitions. [2021-07-09 18:46:56,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:56,131 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 3677 transitions. [2021-07-09 18:46:56,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:46:56,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:56,135 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] [2021-07-09 18:46:56,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:56,345 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:56,346 INFO L82 PathProgramCache]: Analyzing trace with hash -247825074, now seen corresponding path program 1 times [2021-07-09 18:46:56,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:56,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878082019] [2021-07-09 18:46:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:56,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:56,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878082019] [2021-07-09 18:46:56,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878082019] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:46:56,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:46:56,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:46:56,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860410832] [2021-07-09 18:46:56,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:46:56,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:56,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:46:56,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:46:56,383 INFO L87 Difference]: Start difference. First operand 927 states and 3677 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:56,457 INFO L93 Difference]: Finished difference Result 997 states and 3621 transitions. [2021-07-09 18:46:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:46:56,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:46:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:56,466 INFO L225 Difference]: With dead ends: 997 [2021-07-09 18:46:56,466 INFO L226 Difference]: Without dead ends: 884 [2021-07-09 18:46:56,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:46:56,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-07-09 18:46:56,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 808. [2021-07-09 18:46:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.758364312267658) internal successors, (3033), 807 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 3033 transitions. [2021-07-09 18:46:56,495 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 3033 transitions. Word has length 21 [2021-07-09 18:46:56,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:56,496 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 3033 transitions. [2021-07-09 18:46:56,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:56,496 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 3033 transitions. [2021-07-09 18:46:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:46:56,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:56,501 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] [2021-07-09 18:46:56,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:46:56,501 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:56,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:56,502 INFO L82 PathProgramCache]: Analyzing trace with hash 202909006, now seen corresponding path program 2 times [2021-07-09 18:46:56,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:56,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340636798] [2021-07-09 18:46:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:56,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:56,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340636798] [2021-07-09 18:46:56,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340636798] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:46:56,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:46:56,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:46:56,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385148812] [2021-07-09 18:46:56,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:46:56,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:56,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:46:56,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:46:56,554 INFO L87 Difference]: Start difference. First operand 808 states and 3033 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:56,602 INFO L93 Difference]: Finished difference Result 949 states and 3541 transitions. [2021-07-09 18:46:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:46:56,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:46:56,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:56,609 INFO L225 Difference]: With dead ends: 949 [2021-07-09 18:46:56,610 INFO L226 Difference]: Without dead ends: 949 [2021-07-09 18:46:56,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:46:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-07-09 18:46:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 729. [2021-07-09 18:46:56,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.782967032967033) internal successors, (2754), 728 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2754 transitions. [2021-07-09 18:46:56,638 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2754 transitions. Word has length 21 [2021-07-09 18:46:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:56,639 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2754 transitions. [2021-07-09 18:46:56,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2754 transitions. [2021-07-09 18:46:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:56,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:56,642 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] [2021-07-09 18:46:56,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 18:46:56,642 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:56,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:56,643 INFO L82 PathProgramCache]: Analyzing trace with hash -105864754, now seen corresponding path program 1 times [2021-07-09 18:46:56,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:56,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350007715] [2021-07-09 18:46:56,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:56,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:56,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350007715] [2021-07-09 18:46:56,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350007715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:56,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393278412] [2021-07-09 18:46:56,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:56,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:46:56,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:56,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393278412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:56,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:56,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-09 18:46:56,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347040707] [2021-07-09 18:46:56,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:46:56,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:56,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:46:56,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:46:56,858 INFO L87 Difference]: Start difference. First operand 729 states and 2754 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:56,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:56,999 INFO L93 Difference]: Finished difference Result 1389 states and 5122 transitions. [2021-07-09 18:46:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:46:56,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:57,010 INFO L225 Difference]: With dead ends: 1389 [2021-07-09 18:46:57,010 INFO L226 Difference]: Without dead ends: 1389 [2021-07-09 18:46:57,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:46:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-07-09 18:46:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 892. [2021-07-09 18:46:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.772166105499439) internal successors, (3361), 891 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3361 transitions. [2021-07-09 18:46:57,051 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3361 transitions. Word has length 23 [2021-07-09 18:46:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:57,052 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3361 transitions. [2021-07-09 18:46:57,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:57,052 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3361 transitions. [2021-07-09 18:46:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:57,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:57,056 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] [2021-07-09 18:46:57,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:57,281 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:57,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:57,282 INFO L82 PathProgramCache]: Analyzing trace with hash 993256014, now seen corresponding path program 1 times [2021-07-09 18:46:57,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:57,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175941237] [2021-07-09 18:46:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:57,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:57,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175941237] [2021-07-09 18:46:57,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175941237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:57,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943891580] [2021-07-09 18:46:57,350 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 [2021-07-09 18:46:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:57,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:57,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:57,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943891580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:57,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:57,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:46:57,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164844476] [2021-07-09 18:46:57,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:46:57,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:57,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:46:57,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:46:57,440 INFO L87 Difference]: Start difference. First operand 892 states and 3361 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:57,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:57,533 INFO L93 Difference]: Finished difference Result 1781 states and 6589 transitions. [2021-07-09 18:46:57,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:46:57,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:57,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:57,545 INFO L225 Difference]: With dead ends: 1781 [2021-07-09 18:46:57,546 INFO L226 Difference]: Without dead ends: 1738 [2021-07-09 18:46:57,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:46:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-07-09 18:46:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1055. [2021-07-09 18:46:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 3.8055028462998104) internal successors, (4011), 1054 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 4011 transitions. [2021-07-09 18:46:57,584 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 4011 transitions. Word has length 23 [2021-07-09 18:46:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:57,585 INFO L482 AbstractCegarLoop]: Abstraction has 1055 states and 4011 transitions. [2021-07-09 18:46:57,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 4011 transitions. [2021-07-09 18:46:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:57,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:57,588 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] [2021-07-09 18:46:57,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:57,805 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:57,805 INFO L82 PathProgramCache]: Analyzing trace with hash -516640296, now seen corresponding path program 2 times [2021-07-09 18:46:57,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:57,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068660887] [2021-07-09 18:46:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:57,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:57,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068660887] [2021-07-09 18:46:57,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068660887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:57,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287773377] [2021-07-09 18:46:57,861 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 [2021-07-09 18:46:57,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:57,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:57,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:57,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:57,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287773377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:57,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:57,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:46:57,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077161385] [2021-07-09 18:46:57,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:46:57,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:57,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:46:57,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:46:57,994 INFO L87 Difference]: Start difference. First operand 1055 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:58,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:58,095 INFO L93 Difference]: Finished difference Result 1504 states and 5657 transitions. [2021-07-09 18:46:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:46:58,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:58,107 INFO L225 Difference]: With dead ends: 1504 [2021-07-09 18:46:58,108 INFO L226 Difference]: Without dead ends: 1461 [2021-07-09 18:46:58,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:46:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-07-09 18:46:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1067. [2021-07-09 18:46:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.8227016885553473) internal successors, (4075), 1066 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 4075 transitions. [2021-07-09 18:46:58,147 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 4075 transitions. Word has length 23 [2021-07-09 18:46:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:58,147 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 4075 transitions. [2021-07-09 18:46:58,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 4075 transitions. [2021-07-09 18:46:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:58,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:58,152 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] [2021-07-09 18:46:58,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:58,376 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:58,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:58,377 INFO L82 PathProgramCache]: Analyzing trace with hash -28423604, now seen corresponding path program 3 times [2021-07-09 18:46:58,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:58,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426240036] [2021-07-09 18:46:58,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:58,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:58,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426240036] [2021-07-09 18:46:58,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426240036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:58,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848139966] [2021-07-09 18:46:58,445 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 [2021-07-09 18:46:58,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:46:58,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:58,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:58,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:58,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848139966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:58,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:58,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:46:58,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137632685] [2021-07-09 18:46:58,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:46:58,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:58,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:46:58,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:46:58,526 INFO L87 Difference]: Start difference. First operand 1067 states and 4075 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:58,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:58,621 INFO L93 Difference]: Finished difference Result 1444 states and 5469 transitions. [2021-07-09 18:46:58,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:46:58,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:58,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:58,631 INFO L225 Difference]: With dead ends: 1444 [2021-07-09 18:46:58,631 INFO L226 Difference]: Without dead ends: 1401 [2021-07-09 18:46:58,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:46:58,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-07-09 18:46:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1086. [2021-07-09 18:46:58,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 3.8359447004608294) internal successors, (4162), 1085 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 4162 transitions. [2021-07-09 18:46:58,682 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 4162 transitions. Word has length 23 [2021-07-09 18:46:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:58,682 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 4162 transitions. [2021-07-09 18:46:58,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 4162 transitions. [2021-07-09 18:46:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:58,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:58,685 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] [2021-07-09 18:46:58,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:58,901 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:58,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:58,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1774155824, now seen corresponding path program 1 times [2021-07-09 18:46:58,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:58,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092960505] [2021-07-09 18:46:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:58,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:58,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092960505] [2021-07-09 18:46:58,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092960505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:58,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29361164] [2021-07-09 18:46:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:58,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:58,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:59,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29361164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:59,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:59,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:46:59,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002652680] [2021-07-09 18:46:59,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:46:59,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:59,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:46:59,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:46:59,047 INFO L87 Difference]: Start difference. First operand 1086 states and 4162 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:59,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:59,145 INFO L93 Difference]: Finished difference Result 2517 states and 9613 transitions. [2021-07-09 18:46:59,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:46:59,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:59,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:59,173 INFO L225 Difference]: With dead ends: 2517 [2021-07-09 18:46:59,173 INFO L226 Difference]: Without dead ends: 2474 [2021-07-09 18:46:59,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:46:59,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-07-09 18:46:59,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1252. [2021-07-09 18:46:59,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 3.906474820143885) internal successors, (4887), 1251 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 4887 transitions. [2021-07-09 18:46:59,228 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 4887 transitions. Word has length 23 [2021-07-09 18:46:59,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:59,228 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 4887 transitions. [2021-07-09 18:46:59,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 4887 transitions. [2021-07-09 18:46:59,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:59,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:59,232 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] [2021-07-09 18:46:59,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:46:59,455 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:59,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1061650696, now seen corresponding path program 2 times [2021-07-09 18:46:59,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:59,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209454727] [2021-07-09 18:46:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:59,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:59,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209454727] [2021-07-09 18:46:59,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209454727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:59,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101294806] [2021-07-09 18:46:59,496 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:59,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:59,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:59,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:59,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:59,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101294806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:59,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:59,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:46:59,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037373975] [2021-07-09 18:46:59,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:46:59,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:59,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:46:59,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:46:59,608 INFO L87 Difference]: Start difference. First operand 1252 states and 4887 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:59,715 INFO L93 Difference]: Finished difference Result 2128 states and 8197 transitions. [2021-07-09 18:46:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:46:59,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:59,724 INFO L225 Difference]: With dead ends: 2128 [2021-07-09 18:46:59,725 INFO L226 Difference]: Without dead ends: 2085 [2021-07-09 18:46:59,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:46:59,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-07-09 18:46:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1324. [2021-07-09 18:46:59,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9554043839758126) internal successors, (5233), 1323 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5233 transitions. [2021-07-09 18:46:59,781 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5233 transitions. Word has length 23 [2021-07-09 18:46:59,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:59,782 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 5233 transitions. [2021-07-09 18:46:59,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5233 transitions. [2021-07-09 18:46:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:59,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:59,786 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] [2021-07-09 18:47:00,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 18:47:00,001 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:00,001 INFO L82 PathProgramCache]: Analyzing trace with hash -709945864, now seen corresponding path program 3 times [2021-07-09 18:47:00,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:00,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308297160] [2021-07-09 18:47:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:00,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:00,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308297160] [2021-07-09 18:47:00,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308297160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:00,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916250898] [2021-07-09 18:47:00,043 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:00,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:47:00,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:00,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:00,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:00,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916250898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:00,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:00,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:47:00,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663254424] [2021-07-09 18:47:00,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:47:00,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:00,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:47:00,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:47:00,129 INFO L87 Difference]: Start difference. First operand 1324 states and 5233 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:00,219 INFO L93 Difference]: Finished difference Result 2247 states and 8749 transitions. [2021-07-09 18:47:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:47:00,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:47:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:00,228 INFO L225 Difference]: With dead ends: 2247 [2021-07-09 18:47:00,229 INFO L226 Difference]: Without dead ends: 2204 [2021-07-09 18:47:00,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:47:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-07-09 18:47:00,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1380. [2021-07-09 18:47:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.989122552574329) internal successors, (5501), 1379 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5501 transitions. [2021-07-09 18:47:00,272 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5501 transitions. Word has length 23 [2021-07-09 18:47:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:00,273 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 5501 transitions. [2021-07-09 18:47:00,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5501 transitions. [2021-07-09 18:47:00,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:00,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:00,277 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] [2021-07-09 18:47:00,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:00,499 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:00,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:00,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2081052592, now seen corresponding path program 1 times [2021-07-09 18:47:00,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:00,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892424270] [2021-07-09 18:47:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:00,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:00,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892424270] [2021-07-09 18:47:00,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892424270] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:47:00,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:47:00,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:47:00,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437097384] [2021-07-09 18:47:00,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:47:00,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:00,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:47:00,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:47:00,522 INFO L87 Difference]: Start difference. First operand 1380 states and 5501 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:00,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:00,566 INFO L93 Difference]: Finished difference Result 1413 states and 5603 transitions. [2021-07-09 18:47:00,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:47:00,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:47:00,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:00,572 INFO L225 Difference]: With dead ends: 1413 [2021-07-09 18:47:00,572 INFO L226 Difference]: Without dead ends: 1413 [2021-07-09 18:47:00,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:47:00,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-07-09 18:47:00,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1394. [2021-07-09 18:47:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.974156496769562) internal successors, (5536), 1393 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:00,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5536 transitions. [2021-07-09 18:47:00,612 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5536 transitions. Word has length 23 [2021-07-09 18:47:00,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:00,613 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 5536 transitions. [2021-07-09 18:47:00,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:00,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5536 transitions. [2021-07-09 18:47:00,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:00,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:00,618 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] [2021-07-09 18:47:00,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-09 18:47:00,618 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:00,618 INFO L82 PathProgramCache]: Analyzing trace with hash 705218512, now seen corresponding path program 4 times [2021-07-09 18:47:00,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:00,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125052332] [2021-07-09 18:47:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:00,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:00,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125052332] [2021-07-09 18:47:00,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125052332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:00,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380804809] [2021-07-09 18:47:00,657 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:00,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:00,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:00,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:00,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:00,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380804809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:00,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:00,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:47:00,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836924183] [2021-07-09 18:47:00,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:47:00,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:00,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:47:00,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:47:00,759 INFO L87 Difference]: Start difference. First operand 1394 states and 5536 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:00,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:00,826 INFO L93 Difference]: Finished difference Result 2930 states and 11376 transitions. [2021-07-09 18:47:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:47:00,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:47:00,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:00,838 INFO L225 Difference]: With dead ends: 2930 [2021-07-09 18:47:00,839 INFO L226 Difference]: Without dead ends: 2887 [2021-07-09 18:47:00,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:47:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-07-09 18:47:00,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1526. [2021-07-09 18:47:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 4.028196721311476) internal successors, (6143), 1525 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 6143 transitions. [2021-07-09 18:47:00,899 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 6143 transitions. Word has length 23 [2021-07-09 18:47:00,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:00,899 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 6143 transitions. [2021-07-09 18:47:00,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:00,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 6143 transitions. [2021-07-09 18:47:00,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:00,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:00,904 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] [2021-07-09 18:47:01,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:01,117 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:01,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:01,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1829695844, now seen corresponding path program 5 times [2021-07-09 18:47:01,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:01,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736825073] [2021-07-09 18:47:01,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:01,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:01,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736825073] [2021-07-09 18:47:01,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736825073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:01,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878427228] [2021-07-09 18:47:01,162 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:01,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:47:01,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:01,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:01,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:01,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878427228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:01,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:01,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:47:01,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541762483] [2021-07-09 18:47:01,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:47:01,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:01,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:47:01,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:47:01,277 INFO L87 Difference]: Start difference. First operand 1526 states and 6143 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:01,353 INFO L93 Difference]: Finished difference Result 2434 states and 9626 transitions. [2021-07-09 18:47:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:47:01,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:47:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:01,364 INFO L225 Difference]: With dead ends: 2434 [2021-07-09 18:47:01,364 INFO L226 Difference]: Without dead ends: 2391 [2021-07-09 18:47:01,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:47:01,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-07-09 18:47:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1578. [2021-07-09 18:47:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 4.062777425491439) internal successors, (6407), 1577 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 6407 transitions. [2021-07-09 18:47:01,414 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 6407 transitions. Word has length 23 [2021-07-09 18:47:01,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:01,414 INFO L482 AbstractCegarLoop]: Abstraction has 1578 states and 6407 transitions. [2021-07-09 18:47:01,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 6407 transitions. [2021-07-09 18:47:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:01,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:01,420 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] [2021-07-09 18:47:01,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:47:01,633 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:01,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:01,633 INFO L82 PathProgramCache]: Analyzing trace with hash 693674892, now seen corresponding path program 6 times [2021-07-09 18:47:01,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:01,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532088238] [2021-07-09 18:47:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:01,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:01,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532088238] [2021-07-09 18:47:01,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532088238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:01,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320961327] [2021-07-09 18:47:01,688 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:01,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:47:01,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:01,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:01,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:01,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320961327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:01,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:01,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 18:47:01,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970515237] [2021-07-09 18:47:01,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:47:01,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:01,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:47:01,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:01,855 INFO L87 Difference]: Start difference. First operand 1578 states and 6407 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:01,999 INFO L93 Difference]: Finished difference Result 2600 states and 10380 transitions. [2021-07-09 18:47:01,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:47:01,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:47:01,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:02,009 INFO L225 Difference]: With dead ends: 2600 [2021-07-09 18:47:02,009 INFO L226 Difference]: Without dead ends: 2557 [2021-07-09 18:47:02,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:47:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-07-09 18:47:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 1678. [2021-07-09 18:47:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 4.128205128205129) internal successors, (6923), 1677 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6923 transitions. [2021-07-09 18:47:02,065 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6923 transitions. Word has length 23 [2021-07-09 18:47:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:02,065 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 6923 transitions. [2021-07-09 18:47:02,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:02,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6923 transitions. [2021-07-09 18:47:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:02,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:02,070 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] [2021-07-09 18:47:02,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 18:47:02,295 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:02,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1462519728, now seen corresponding path program 2 times [2021-07-09 18:47:02,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:02,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601160543] [2021-07-09 18:47:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:02,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:02,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601160543] [2021-07-09 18:47:02,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601160543] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:47:02,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:47:02,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:47:02,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755642676] [2021-07-09 18:47:02,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:47:02,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:02,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:47:02,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:47:02,317 INFO L87 Difference]: Start difference. First operand 1678 states and 6923 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:02,376 INFO L93 Difference]: Finished difference Result 1899 states and 7725 transitions. [2021-07-09 18:47:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:47:02,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:47:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:02,385 INFO L225 Difference]: With dead ends: 1899 [2021-07-09 18:47:02,386 INFO L226 Difference]: Without dead ends: 1866 [2021-07-09 18:47:02,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:47:02,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-07-09 18:47:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1777. [2021-07-09 18:47:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 4.108671171171171) internal successors, (7297), 1776 states have internal predecessors, (7297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 7297 transitions. [2021-07-09 18:47:02,434 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 7297 transitions. Word has length 23 [2021-07-09 18:47:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:02,434 INFO L482 AbstractCegarLoop]: Abstraction has 1777 states and 7297 transitions. [2021-07-09 18:47:02,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 7297 transitions. [2021-07-09 18:47:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:02,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:02,439 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] [2021-07-09 18:47:02,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-09 18:47:02,439 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:02,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:02,440 INFO L82 PathProgramCache]: Analyzing trace with hash 97493908, now seen corresponding path program 2 times [2021-07-09 18:47:02,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:02,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105193265] [2021-07-09 18:47:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:02,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:02,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105193265] [2021-07-09 18:47:02,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105193265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:02,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356184037] [2021-07-09 18:47:02,461 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:02,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:02,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:02,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:47:02,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:02,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356184037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:02,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:02,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-09 18:47:02,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334166160] [2021-07-09 18:47:02,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:47:02,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:02,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:47:02,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:02,555 INFO L87 Difference]: Start difference. First operand 1777 states and 7297 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:02,723 INFO L93 Difference]: Finished difference Result 3584 states and 13842 transitions. [2021-07-09 18:47:02,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:47:02,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:47:02,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:02,739 INFO L225 Difference]: With dead ends: 3584 [2021-07-09 18:47:02,739 INFO L226 Difference]: Without dead ends: 3584 [2021-07-09 18:47:02,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:47:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-07-09 18:47:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 2158. [2021-07-09 18:47:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 4.179879462216041) internal successors, (9016), 2157 states have internal predecessors, (9016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:02,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 9016 transitions. [2021-07-09 18:47:02,831 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 9016 transitions. Word has length 23 [2021-07-09 18:47:02,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:02,832 INFO L482 AbstractCegarLoop]: Abstraction has 2158 states and 9016 transitions. [2021-07-09 18:47:02,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:02,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 9016 transitions. [2021-07-09 18:47:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:02,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:02,838 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:03,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:47:03,053 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:03,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1352231348, now seen corresponding path program 3 times [2021-07-09 18:47:03,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:03,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795605570] [2021-07-09 18:47:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:03,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:03,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795605570] [2021-07-09 18:47:03,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795605570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:03,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302698027] [2021-07-09 18:47:03,074 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:03,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:47:03,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:03,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:47:03,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:03,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302698027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:03,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:03,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-09 18:47:03,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760497141] [2021-07-09 18:47:03,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:47:03,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:03,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:47:03,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:03,165 INFO L87 Difference]: Start difference. First operand 2158 states and 9016 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:03,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:03,408 INFO L93 Difference]: Finished difference Result 4126 states and 16268 transitions. [2021-07-09 18:47:03,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:47:03,408 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:47:03,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:03,425 INFO L225 Difference]: With dead ends: 4126 [2021-07-09 18:47:03,425 INFO L226 Difference]: Without dead ends: 4126 [2021-07-09 18:47:03,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:47:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-07-09 18:47:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2337. [2021-07-09 18:47:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 4.2555650684931505) internal successors, (9941), 2336 states have internal predecessors, (9941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 9941 transitions. [2021-07-09 18:47:03,538 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 9941 transitions. Word has length 23 [2021-07-09 18:47:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:03,538 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 9941 transitions. [2021-07-09 18:47:03,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 9941 transitions. [2021-07-09 18:47:03,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:03,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:03,545 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] [2021-07-09 18:47:03,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:03,746 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:03,746 INFO L82 PathProgramCache]: Analyzing trace with hash -424342964, now seen corresponding path program 4 times [2021-07-09 18:47:03,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:03,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516266572] [2021-07-09 18:47:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:03,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:03,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516266572] [2021-07-09 18:47:03,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516266572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:03,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764004796] [2021-07-09 18:47:03,798 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:03,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:03,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:03,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:03,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:03,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764004796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:03,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:03,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:47:03,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455599702] [2021-07-09 18:47:03,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:47:03,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:03,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:47:03,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:47:03,882 INFO L87 Difference]: Start difference. First operand 2337 states and 9941 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:03,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:03,964 INFO L93 Difference]: Finished difference Result 2707 states and 11337 transitions. [2021-07-09 18:47:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:47:03,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:47:03,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:03,973 INFO L225 Difference]: With dead ends: 2707 [2021-07-09 18:47:03,973 INFO L226 Difference]: Without dead ends: 2643 [2021-07-09 18:47:03,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:47:03,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-07-09 18:47:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2343. [2021-07-09 18:47:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 4.259180187873612) internal successors, (9975), 2342 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9975 transitions. [2021-07-09 18:47:04,030 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9975 transitions. Word has length 23 [2021-07-09 18:47:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:04,031 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 9975 transitions. [2021-07-09 18:47:04,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9975 transitions. [2021-07-09 18:47:04,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:04,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:04,038 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] [2021-07-09 18:47:04,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:04,253 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:04,253 INFO L82 PathProgramCache]: Analyzing trace with hash 63873728, now seen corresponding path program 5 times [2021-07-09 18:47:04,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:04,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572659597] [2021-07-09 18:47:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:04,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:04,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572659597] [2021-07-09 18:47:04,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572659597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:04,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804498470] [2021-07-09 18:47:04,287 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:04,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:47:04,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:04,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:04,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:04,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804498470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:04,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:04,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:47:04,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6983633] [2021-07-09 18:47:04,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:47:04,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:04,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:47:04,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:47:04,352 INFO L87 Difference]: Start difference. First operand 2343 states and 9975 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:04,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:04,418 INFO L93 Difference]: Finished difference Result 2722 states and 11385 transitions. [2021-07-09 18:47:04,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:47:04,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:47:04,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:04,425 INFO L225 Difference]: With dead ends: 2722 [2021-07-09 18:47:04,426 INFO L226 Difference]: Without dead ends: 2658 [2021-07-09 18:47:04,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:47:04,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-07-09 18:47:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 2347. [2021-07-09 18:47:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.2621483375959075) internal successors, (9999), 2346 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 9999 transitions. [2021-07-09 18:47:04,499 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 9999 transitions. Word has length 23 [2021-07-09 18:47:04,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:04,499 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 9999 transitions. [2021-07-09 18:47:04,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:04,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 9999 transitions. [2021-07-09 18:47:04,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:04,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:04,506 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] [2021-07-09 18:47:04,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:04,721 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:04,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:04,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1522443284, now seen corresponding path program 6 times [2021-07-09 18:47:04,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:04,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580437527] [2021-07-09 18:47:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:04,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:04,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580437527] [2021-07-09 18:47:04,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580437527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:04,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154761354] [2021-07-09 18:47:04,754 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:04,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:47:04,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:04,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:04,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:04,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154761354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:04,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:04,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:47:04,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014233111] [2021-07-09 18:47:04,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:47:04,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:04,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:47:04,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:47:04,835 INFO L87 Difference]: Start difference. First operand 2347 states and 9999 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:04,909 INFO L93 Difference]: Finished difference Result 3086 states and 12754 transitions. [2021-07-09 18:47:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:47:04,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:47:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:04,915 INFO L225 Difference]: With dead ends: 3086 [2021-07-09 18:47:04,915 INFO L226 Difference]: Without dead ends: 3022 [2021-07-09 18:47:04,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:47:04,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-07-09 18:47:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2368. [2021-07-09 18:47:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 4.27291930713984) internal successors, (10114), 2367 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 10114 transitions. [2021-07-09 18:47:04,989 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 10114 transitions. Word has length 23 [2021-07-09 18:47:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:04,990 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 10114 transitions. [2021-07-09 18:47:04,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 10114 transitions. [2021-07-09 18:47:04,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:04,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:04,995 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, 1] [2021-07-09 18:47:05,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 18:47:05,218 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:05,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:05,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1523854228, now seen corresponding path program 3 times [2021-07-09 18:47:05,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:05,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688779892] [2021-07-09 18:47:05,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:05,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:05,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688779892] [2021-07-09 18:47:05,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688779892] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:47:05,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:47:05,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:47:05,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690306167] [2021-07-09 18:47:05,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:47:05,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:05,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:47:05,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:47:05,242 INFO L87 Difference]: Start difference. First operand 2368 states and 10114 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:05,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:05,292 INFO L93 Difference]: Finished difference Result 2525 states and 10725 transitions. [2021-07-09 18:47:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:47:05,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:47:05,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:05,298 INFO L225 Difference]: With dead ends: 2525 [2021-07-09 18:47:05,299 INFO L226 Difference]: Without dead ends: 2525 [2021-07-09 18:47:05,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:47:05,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-07-09 18:47:05,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2414. [2021-07-09 18:47:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.261500207210941) internal successors, (10283), 2413 states have internal predecessors, (10283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 10283 transitions. [2021-07-09 18:47:05,380 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 10283 transitions. Word has length 23 [2021-07-09 18:47:05,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:05,380 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 10283 transitions. [2021-07-09 18:47:05,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:05,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 10283 transitions. [2021-07-09 18:47:05,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:05,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:05,390 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] [2021-07-09 18:47:05,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-07-09 18:47:05,390 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:05,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:05,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1093628820, now seen corresponding path program 4 times [2021-07-09 18:47:05,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:05,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760750777] [2021-07-09 18:47:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:05,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:05,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760750777] [2021-07-09 18:47:05,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760750777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:05,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716759658] [2021-07-09 18:47:05,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:05,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:05,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:05,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:47:05,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:05,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716759658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:05,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:05,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-09 18:47:05,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351940348] [2021-07-09 18:47:05,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:47:05,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:05,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:47:05,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:47:05,518 INFO L87 Difference]: Start difference. First operand 2414 states and 10283 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:05,642 INFO L93 Difference]: Finished difference Result 3537 states and 14681 transitions. [2021-07-09 18:47:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:47:05,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:47:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:05,654 INFO L225 Difference]: With dead ends: 3537 [2021-07-09 18:47:05,654 INFO L226 Difference]: Without dead ends: 3537 [2021-07-09 18:47:05,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:47:05,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-07-09 18:47:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2731. [2021-07-09 18:47:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 4.247252747252747) internal successors, (11595), 2730 states have internal predecessors, (11595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:05,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 11595 transitions. [2021-07-09 18:47:05,736 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 11595 transitions. Word has length 23 [2021-07-09 18:47:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:05,736 INFO L482 AbstractCegarLoop]: Abstraction has 2731 states and 11595 transitions. [2021-07-09 18:47:05,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 11595 transitions. [2021-07-09 18:47:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:05,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:05,744 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] [2021-07-09 18:47:05,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 18:47:05,965 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1241815956, now seen corresponding path program 5 times [2021-07-09 18:47:05,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:05,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914419523] [2021-07-09 18:47:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:05,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:05,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914419523] [2021-07-09 18:47:05,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914419523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:05,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038264865] [2021-07-09 18:47:05,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:06,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:47:06,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:06,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:47:06,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:06,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038264865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:06,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:06,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-09 18:47:06,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727920989] [2021-07-09 18:47:06,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:47:06,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:47:06,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:06,075 INFO L87 Difference]: Start difference. First operand 2731 states and 11595 transitions. Second operand has 8 states, 8 states have (on average 4.125) 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) [2021-07-09 18:47:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:06,229 INFO L93 Difference]: Finished difference Result 5435 states and 21973 transitions. [2021-07-09 18:47:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:47:06,230 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) 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 23 [2021-07-09 18:47:06,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:06,241 INFO L225 Difference]: With dead ends: 5435 [2021-07-09 18:47:06,241 INFO L226 Difference]: Without dead ends: 5435 [2021-07-09 18:47:06,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:47:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-07-09 18:47:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 3753. [2021-07-09 18:47:06,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 4.30863539445629) internal successors, (16166), 3752 states have internal predecessors, (16166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:06,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 16166 transitions. [2021-07-09 18:47:06,357 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 16166 transitions. Word has length 23 [2021-07-09 18:47:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:06,357 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 16166 transitions. [2021-07-09 18:47:06,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) 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) [2021-07-09 18:47:06,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 16166 transitions. [2021-07-09 18:47:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:47:06,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:06,367 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] [2021-07-09 18:47:06,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 18:47:06,588 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:06,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1311709520, now seen corresponding path program 6 times [2021-07-09 18:47:06,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:06,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331950492] [2021-07-09 18:47:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:06,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:06,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331950492] [2021-07-09 18:47:06,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331950492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:06,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544843278] [2021-07-09 18:47:06,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:06,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:47:06,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:06,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:47:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:06,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544843278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:06,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:06,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-09 18:47:06,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551023200] [2021-07-09 18:47:06,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:47:06,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:06,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:47:06,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:06,693 INFO L87 Difference]: Start difference. First operand 3753 states and 16166 transitions. Second operand has 8 states, 8 states have (on average 4.125) 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) [2021-07-09 18:47:06,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:06,923 INFO L93 Difference]: Finished difference Result 6635 states and 27289 transitions. [2021-07-09 18:47:06,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:47:06,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) 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 23 [2021-07-09 18:47:06,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:06,941 INFO L225 Difference]: With dead ends: 6635 [2021-07-09 18:47:06,941 INFO L226 Difference]: Without dead ends: 6635 [2021-07-09 18:47:06,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:47:06,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2021-07-09 18:47:07,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 4003. [2021-07-09 18:47:07,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 4.365817091454272) internal successors, (17472), 4002 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 17472 transitions. [2021-07-09 18:47:07,089 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 17472 transitions. Word has length 23 [2021-07-09 18:47:07,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:07,090 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 17472 transitions. [2021-07-09 18:47:07,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) 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) [2021-07-09 18:47:07,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 17472 transitions. [2021-07-09 18:47:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:07,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:07,100 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:07,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 18:47:07,314 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:07,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:07,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1097839692, now seen corresponding path program 7 times [2021-07-09 18:47:07,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:07,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516632096] [2021-07-09 18:47:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:07,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:07,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516632096] [2021-07-09 18:47:07,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516632096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:07,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434463321] [2021-07-09 18:47:07,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:07,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:47:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:07,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434463321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:07,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:07,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-09 18:47:07,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632409907] [2021-07-09 18:47:07,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:47:07,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:07,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:47:07,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:47:07,451 INFO L87 Difference]: Start difference. First operand 4003 states and 17472 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:07,648 INFO L93 Difference]: Finished difference Result 8080 states and 33388 transitions. [2021-07-09 18:47:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:47:07,649 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 25 [2021-07-09 18:47:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:07,669 INFO L225 Difference]: With dead ends: 8080 [2021-07-09 18:47:07,669 INFO L226 Difference]: Without dead ends: 7806 [2021-07-09 18:47:07,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:47:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7806 states. [2021-07-09 18:47:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7806 to 5496. [2021-07-09 18:47:07,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 5495 states have (on average 4.4049135577798) internal successors, (24205), 5495 states have internal predecessors, (24205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 24205 transitions. [2021-07-09 18:47:07,925 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 24205 transitions. Word has length 25 [2021-07-09 18:47:07,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:07,925 INFO L482 AbstractCegarLoop]: Abstraction has 5496 states and 24205 transitions. [2021-07-09 18:47:07,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:07,925 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 24205 transitions. [2021-07-09 18:47:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:07,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:07,943 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:08,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:47:08,166 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:08,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:08,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1886925744, now seen corresponding path program 4 times [2021-07-09 18:47:08,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:08,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084440011] [2021-07-09 18:47:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:08,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:08,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084440011] [2021-07-09 18:47:08,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084440011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:08,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064891374] [2021-07-09 18:47:08,255 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:08,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:08,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:08,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:47:08,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:08,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064891374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:08,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:08,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:47:08,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234446730] [2021-07-09 18:47:08,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:47:08,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:08,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:47:08,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:08,342 INFO L87 Difference]: Start difference. First operand 5496 states and 24205 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:47:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:08,492 INFO L93 Difference]: Finished difference Result 7686 states and 32613 transitions. [2021-07-09 18:47:08,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:47:08,493 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:47:08,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:08,511 INFO L225 Difference]: With dead ends: 7686 [2021-07-09 18:47:08,511 INFO L226 Difference]: Without dead ends: 7610 [2021-07-09 18:47:08,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:08,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7610 states. [2021-07-09 18:47:08,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7610 to 5750. [2021-07-09 18:47:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 4.412071664637328) internal successors, (25365), 5749 states have internal predecessors, (25365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 25365 transitions. [2021-07-09 18:47:08,680 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 25365 transitions. Word has length 25 [2021-07-09 18:47:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:08,680 INFO L482 AbstractCegarLoop]: Abstraction has 5750 states and 25365 transitions. [2021-07-09 18:47:08,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:47:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 25365 transitions. [2021-07-09 18:47:08,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:08,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:08,696 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] [2021-07-09 18:47:08,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:08,917 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:08,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:08,918 INFO L82 PathProgramCache]: Analyzing trace with hash -787804976, now seen corresponding path program 1 times [2021-07-09 18:47:08,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:08,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367671477] [2021-07-09 18:47:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:08,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:08,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367671477] [2021-07-09 18:47:08,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367671477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:08,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380902683] [2021-07-09 18:47:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:47:08,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:09,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380902683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:09,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:09,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 18:47:09,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368733949] [2021-07-09 18:47:09,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:47:09,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:09,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:47:09,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:47:09,104 INFO L87 Difference]: Start difference. First operand 5750 states and 25365 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:09,566 INFO L93 Difference]: Finished difference Result 13992 states and 58011 transitions. [2021-07-09 18:47:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:47:09,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:47:09,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:09,604 INFO L225 Difference]: With dead ends: 13992 [2021-07-09 18:47:09,605 INFO L226 Difference]: Without dead ends: 13926 [2021-07-09 18:47:09,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:47:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13926 states. [2021-07-09 18:47:09,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13926 to 7249. [2021-07-09 18:47:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 4.467301324503311) internal successors, (32379), 7248 states have internal predecessors, (32379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 32379 transitions. [2021-07-09 18:47:09,956 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 32379 transitions. Word has length 25 [2021-07-09 18:47:09,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:09,957 INFO L482 AbstractCegarLoop]: Abstraction has 7249 states and 32379 transitions. [2021-07-09 18:47:09,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:09,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 32379 transitions. [2021-07-09 18:47:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:09,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:09,974 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] [2021-07-09 18:47:10,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:47:10,175 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:10,175 INFO L82 PathProgramCache]: Analyzing trace with hash -717911412, now seen corresponding path program 2 times [2021-07-09 18:47:10,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:10,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462692517] [2021-07-09 18:47:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:10,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:10,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462692517] [2021-07-09 18:47:10,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462692517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:10,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939833109] [2021-07-09 18:47:10,206 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:10,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:10,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:10,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:47:10,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:10,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939833109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:10,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:10,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 18:47:10,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298708546] [2021-07-09 18:47:10,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:47:10,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:10,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:47:10,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:47:10,323 INFO L87 Difference]: Start difference. First operand 7249 states and 32379 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:10,892 INFO L93 Difference]: Finished difference Result 12594 states and 53597 transitions. [2021-07-09 18:47:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:47:10,893 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:47:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:10,929 INFO L225 Difference]: With dead ends: 12594 [2021-07-09 18:47:10,929 INFO L226 Difference]: Without dead ends: 12594 [2021-07-09 18:47:10,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:47:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2021-07-09 18:47:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 8788. [2021-07-09 18:47:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 8787 states have (on average 4.496073745305565) internal successors, (39507), 8787 states have internal predecessors, (39507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 39507 transitions. [2021-07-09 18:47:11,331 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 39507 transitions. Word has length 25 [2021-07-09 18:47:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:11,331 INFO L482 AbstractCegarLoop]: Abstraction has 8788 states and 39507 transitions. [2021-07-09 18:47:11,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 39507 transitions. [2021-07-09 18:47:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:11,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:11,350 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] [2021-07-09 18:47:11,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:11,551 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:11,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:11,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1056551404, now seen corresponding path program 3 times [2021-07-09 18:47:11,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:11,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082986981] [2021-07-09 18:47:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:11,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:11,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082986981] [2021-07-09 18:47:11,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082986981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:11,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260303102] [2021-07-09 18:47:11,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:11,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:47:11,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:11,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:47:11,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:11,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260303102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:11,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:11,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:47:11,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229646052] [2021-07-09 18:47:11,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:47:11,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:11,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:47:11,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:47:11,834 INFO L87 Difference]: Start difference. First operand 8788 states and 39507 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:12,527 INFO L93 Difference]: Finished difference Result 29971 states and 129329 transitions. [2021-07-09 18:47:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:47:12,528 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:47:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:12,738 INFO L225 Difference]: With dead ends: 29971 [2021-07-09 18:47:12,738 INFO L226 Difference]: Without dead ends: 29848 [2021-07-09 18:47:12,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:47:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29848 states. [2021-07-09 18:47:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29848 to 14478. [2021-07-09 18:47:13,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14478 states, 14477 states have (on average 4.563859915728397) internal successors, (66071), 14477 states have internal predecessors, (66071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14478 states to 14478 states and 66071 transitions. [2021-07-09 18:47:13,410 INFO L78 Accepts]: Start accepts. Automaton has 14478 states and 66071 transitions. Word has length 25 [2021-07-09 18:47:13,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:13,410 INFO L482 AbstractCegarLoop]: Abstraction has 14478 states and 66071 transitions. [2021-07-09 18:47:13,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 14478 states and 66071 transitions. [2021-07-09 18:47:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:13,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:13,464 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] [2021-07-09 18:47:13,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 18:47:13,669 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:13,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:13,669 INFO L82 PathProgramCache]: Analyzing trace with hash -839523414, now seen corresponding path program 4 times [2021-07-09 18:47:13,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:13,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555664225] [2021-07-09 18:47:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:13,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:13,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555664225] [2021-07-09 18:47:13,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555664225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:13,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121380213] [2021-07-09 18:47:13,744 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:13,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:13,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:13,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:47:13,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:13,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121380213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:13,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:13,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-07-09 18:47:13,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449825449] [2021-07-09 18:47:13,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:47:13,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:13,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:47:13,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:47:13,858 INFO L87 Difference]: Start difference. First operand 14478 states and 66071 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:14,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:14,596 INFO L93 Difference]: Finished difference Result 31001 states and 134975 transitions. [2021-07-09 18:47:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:47:14,596 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:47:14,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:14,735 INFO L225 Difference]: With dead ends: 31001 [2021-07-09 18:47:14,735 INFO L226 Difference]: Without dead ends: 30851 [2021-07-09 18:47:14,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:47:14,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30851 states. [2021-07-09 18:47:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30851 to 21508. [2021-07-09 18:47:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21508 states, 21507 states have (on average 4.549309527130702) internal successors, (97842), 21507 states have internal predecessors, (97842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21508 states to 21508 states and 97842 transitions. [2021-07-09 18:47:15,424 INFO L78 Accepts]: Start accepts. Automaton has 21508 states and 97842 transitions. Word has length 25 [2021-07-09 18:47:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:15,424 INFO L482 AbstractCegarLoop]: Abstraction has 21508 states and 97842 transitions. [2021-07-09 18:47:15,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 21508 states and 97842 transitions. [2021-07-09 18:47:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:15,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:15,471 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] [2021-07-09 18:47:15,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:15,676 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:15,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1905173876, now seen corresponding path program 5 times [2021-07-09 18:47:15,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:15,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548961851] [2021-07-09 18:47:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:15,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:15,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548961851] [2021-07-09 18:47:15,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548961851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:15,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884944632] [2021-07-09 18:47:15,741 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:15,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:15,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:15,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:47:15,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:16,046 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-09 18:47:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:16,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884944632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:16,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:16,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:47:16,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219942506] [2021-07-09 18:47:16,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:47:16,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:47:16,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:47:16,084 INFO L87 Difference]: Start difference. First operand 21508 states and 97842 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:16,549 INFO L93 Difference]: Finished difference Result 27651 states and 123756 transitions. [2021-07-09 18:47:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:47:16,550 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:47:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:16,822 INFO L225 Difference]: With dead ends: 27651 [2021-07-09 18:47:16,822 INFO L226 Difference]: Without dead ends: 27523 [2021-07-09 18:47:16,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:47:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27523 states. [2021-07-09 18:47:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27523 to 21550. [2021-07-09 18:47:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21550 states, 21549 states have (on average 4.550559190681702) internal successors, (98060), 21549 states have internal predecessors, (98060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:17,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21550 states to 21550 states and 98060 transitions. [2021-07-09 18:47:17,338 INFO L78 Accepts]: Start accepts. Automaton has 21550 states and 98060 transitions. Word has length 25 [2021-07-09 18:47:17,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:17,338 INFO L482 AbstractCegarLoop]: Abstraction has 21550 states and 98060 transitions. [2021-07-09 18:47:17,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:17,338 INFO L276 IsEmpty]: Start isEmpty. Operand 21550 states and 98060 transitions. [2021-07-09 18:47:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:17,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:17,536 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] [2021-07-09 18:47:17,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 18:47:17,745 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:17,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2009638882, now seen corresponding path program 6 times [2021-07-09 18:47:17,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:17,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144098328] [2021-07-09 18:47:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:17,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:17,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144098328] [2021-07-09 18:47:17,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144098328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:17,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479256582] [2021-07-09 18:47:17,812 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:17,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:47:17,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:17,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:47:17,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:17,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479256582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:17,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:17,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:47:17,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978708230] [2021-07-09 18:47:17,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:47:17,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:17,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:47:17,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:47:17,942 INFO L87 Difference]: Start difference. First operand 21550 states and 98060 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-07-09 18:47:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:18,255 INFO L93 Difference]: Finished difference Result 22500 states and 101338 transitions. [2021-07-09 18:47:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:47:18,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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 25 [2021-07-09 18:47:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:18,481 INFO L225 Difference]: With dead ends: 22500 [2021-07-09 18:47:18,481 INFO L226 Difference]: Without dead ends: 22316 [2021-07-09 18:47:18,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:47:18,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22316 states. [2021-07-09 18:47:18,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22316 to 21544. [2021-07-09 18:47:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21544 states, 21543 states have (on average 4.5494592210926985) internal successors, (98009), 21543 states have internal predecessors, (98009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21544 states to 21544 states and 98009 transitions. [2021-07-09 18:47:19,040 INFO L78 Accepts]: Start accepts. Automaton has 21544 states and 98009 transitions. Word has length 25 [2021-07-09 18:47:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:19,041 INFO L482 AbstractCegarLoop]: Abstraction has 21544 states and 98009 transitions. [2021-07-09 18:47:19,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-07-09 18:47:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 21544 states and 98009 transitions. [2021-07-09 18:47:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:19,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:19,083 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] [2021-07-09 18:47:19,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:47:19,285 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:19,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1604748080, now seen corresponding path program 7 times [2021-07-09 18:47:19,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:19,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242294766] [2021-07-09 18:47:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:19,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:19,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242294766] [2021-07-09 18:47:19,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242294766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:19,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112307116] [2021-07-09 18:47:19,341 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:19,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:47:19,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:19,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112307116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:19,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:19,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-07-09 18:47:19,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093741937] [2021-07-09 18:47:19,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:47:19,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:19,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:47:19,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:47:19,469 INFO L87 Difference]: Start difference. First operand 21544 states and 98009 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:20,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:20,224 INFO L93 Difference]: Finished difference Result 37571 states and 165395 transitions. [2021-07-09 18:47:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:47:20,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:47:20,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:20,373 INFO L225 Difference]: With dead ends: 37571 [2021-07-09 18:47:20,373 INFO L226 Difference]: Without dead ends: 37406 [2021-07-09 18:47:20,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:47:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37406 states. [2021-07-09 18:47:21,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37406 to 25632. [2021-07-09 18:47:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25632 states, 25631 states have (on average 4.59131520424486) internal successors, (117680), 25631 states have internal predecessors, (117680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:21,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25632 states to 25632 states and 117680 transitions. [2021-07-09 18:47:21,369 INFO L78 Accepts]: Start accepts. Automaton has 25632 states and 117680 transitions. Word has length 25 [2021-07-09 18:47:21,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:21,369 INFO L482 AbstractCegarLoop]: Abstraction has 25632 states and 117680 transitions. [2021-07-09 18:47:21,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:21,370 INFO L276 IsEmpty]: Start isEmpty. Operand 25632 states and 117680 transitions. [2021-07-09 18:47:21,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:21,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:21,445 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] [2021-07-09 18:47:21,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 18:47:21,646 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:21,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:21,646 INFO L82 PathProgramCache]: Analyzing trace with hash 544048456, now seen corresponding path program 8 times [2021-07-09 18:47:21,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:21,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782966496] [2021-07-09 18:47:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:21,878 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-09 18:47:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:21,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:21,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782966496] [2021-07-09 18:47:21,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782966496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:21,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023635788] [2021-07-09 18:47:21,939 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:21,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:21,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:21,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:47:21,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:22,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023635788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:22,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:22,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:47:22,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940801199] [2021-07-09 18:47:22,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:47:22,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:22,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:47:22,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:47:22,084 INFO L87 Difference]: Start difference. First operand 25632 states and 117680 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) [2021-07-09 18:47:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:22,469 INFO L93 Difference]: Finished difference Result 26558 states and 120874 transitions. [2021-07-09 18:47:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:47:22,470 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 25 [2021-07-09 18:47:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:22,596 INFO L225 Difference]: With dead ends: 26558 [2021-07-09 18:47:22,596 INFO L226 Difference]: Without dead ends: 26388 [2021-07-09 18:47:22,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:47:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26388 states. [2021-07-09 18:47:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26388 to 25652. [2021-07-09 18:47:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25652 states, 25651 states have (on average 4.589294764336673) internal successors, (117720), 25651 states have internal predecessors, (117720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25652 states to 25652 states and 117720 transitions. [2021-07-09 18:47:23,427 INFO L78 Accepts]: Start accepts. Automaton has 25652 states and 117720 transitions. Word has length 25 [2021-07-09 18:47:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:23,427 INFO L482 AbstractCegarLoop]: Abstraction has 25652 states and 117720 transitions. [2021-07-09 18:47:23,427 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) [2021-07-09 18:47:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 25652 states and 117720 transitions. [2021-07-09 18:47:23,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:23,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:23,484 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] [2021-07-09 18:47:23,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:23,685 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:23,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:23,685 INFO L82 PathProgramCache]: Analyzing trace with hash -792544304, now seen corresponding path program 1 times [2021-07-09 18:47:23,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:23,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969070463] [2021-07-09 18:47:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:23,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:23,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969070463] [2021-07-09 18:47:23,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969070463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:23,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305783501] [2021-07-09 18:47:23,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:47:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:23,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305783501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:23,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:23,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-09 18:47:23,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788948573] [2021-07-09 18:47:23,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:47:23,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:23,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:47:23,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:47:23,827 INFO L87 Difference]: Start difference. First operand 25652 states and 117720 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:24,348 INFO L93 Difference]: Finished difference Result 28634 states and 129447 transitions. [2021-07-09 18:47:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:47:24,348 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:47:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:24,472 INFO L225 Difference]: With dead ends: 28634 [2021-07-09 18:47:24,472 INFO L226 Difference]: Without dead ends: 28616 [2021-07-09 18:47:24,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:47:24,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28616 states. [2021-07-09 18:47:25,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28616 to 26082. [2021-07-09 18:47:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26082 states, 26081 states have (on average 4.586288869291821) internal successors, (119615), 26081 states have internal predecessors, (119615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26082 states to 26082 states and 119615 transitions. [2021-07-09 18:47:25,259 INFO L78 Accepts]: Start accepts. Automaton has 26082 states and 119615 transitions. Word has length 25 [2021-07-09 18:47:25,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:25,259 INFO L482 AbstractCegarLoop]: Abstraction has 26082 states and 119615 transitions. [2021-07-09 18:47:25,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 26082 states and 119615 transitions. [2021-07-09 18:47:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:25,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:25,522 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] [2021-07-09 18:47:25,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 18:47:25,737 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:25,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash -341810224, now seen corresponding path program 2 times [2021-07-09 18:47:25,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:25,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299965724] [2021-07-09 18:47:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:25,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:25,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299965724] [2021-07-09 18:47:25,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299965724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:25,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84670128] [2021-07-09 18:47:25,770 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:25,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:25,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:25,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:47:25,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:25,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84670128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:25,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:25,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-09 18:47:25,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237110632] [2021-07-09 18:47:25,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:47:25,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:25,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:47:25,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:47:25,874 INFO L87 Difference]: Start difference. First operand 26082 states and 119615 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:26,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:26,242 INFO L93 Difference]: Finished difference Result 30645 states and 137873 transitions. [2021-07-09 18:47:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:47:26,243 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:47:26,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:26,364 INFO L225 Difference]: With dead ends: 30645 [2021-07-09 18:47:26,365 INFO L226 Difference]: Without dead ends: 30645 [2021-07-09 18:47:26,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:47:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30645 states. [2021-07-09 18:47:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30645 to 25908. [2021-07-09 18:47:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25908 states, 25907 states have (on average 4.584243640714865) internal successors, (118764), 25907 states have internal predecessors, (118764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:27,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25908 states to 25908 states and 118764 transitions. [2021-07-09 18:47:27,276 INFO L78 Accepts]: Start accepts. Automaton has 25908 states and 118764 transitions. Word has length 25 [2021-07-09 18:47:27,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:27,276 INFO L482 AbstractCegarLoop]: Abstraction has 25908 states and 118764 transitions. [2021-07-09 18:47:27,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:27,276 INFO L276 IsEmpty]: Start isEmpty. Operand 25908 states and 118764 transitions. [2021-07-09 18:47:27,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:27,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:27,342 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] [2021-07-09 18:47:27,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:47:27,542 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:27,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:27,543 INFO L82 PathProgramCache]: Analyzing trace with hash 35028364, now seen corresponding path program 3 times [2021-07-09 18:47:27,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:27,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833751693] [2021-07-09 18:47:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:27,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:27,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833751693] [2021-07-09 18:47:27,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833751693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:27,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135987623] [2021-07-09 18:47:27,575 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:27,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:47:27,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:27,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:47:27,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:27,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135987623] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:47:27,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:47:27,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-07-09 18:47:27,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583133296] [2021-07-09 18:47:27,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:47:27,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:27,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:47:27,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:47:27,686 INFO L87 Difference]: Start difference. First operand 25908 states and 118764 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-07-09 18:47:28,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:28,273 INFO L93 Difference]: Finished difference Result 33932 states and 151310 transitions. [2021-07-09 18:47:28,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:47:28,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 [2021-07-09 18:47:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:28,400 INFO L225 Difference]: With dead ends: 33932 [2021-07-09 18:47:28,400 INFO L226 Difference]: Without dead ends: 33850 [2021-07-09 18:47:28,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:47:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33850 states. [2021-07-09 18:47:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33850 to 27223. [2021-07-09 18:47:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27223 states, 27222 states have (on average 4.581074131217398) internal successors, (124706), 27222 states have internal predecessors, (124706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27223 states to 27223 states and 124706 transitions. [2021-07-09 18:47:29,272 INFO L78 Accepts]: Start accepts. Automaton has 27223 states and 124706 transitions. Word has length 25 [2021-07-09 18:47:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:29,272 INFO L482 AbstractCegarLoop]: Abstraction has 27223 states and 124706 transitions. [2021-07-09 18:47:29,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-07-09 18:47:29,272 INFO L276 IsEmpty]: Start isEmpty. Operand 27223 states and 124706 transitions. [2021-07-09 18:47:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:29,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:29,548 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:29,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:29,769 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:29,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:29,769 INFO L82 PathProgramCache]: Analyzing trace with hash 137417170, now seen corresponding path program 5 times [2021-07-09 18:47:29,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:29,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252193740] [2021-07-09 18:47:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:29,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:29,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252193740] [2021-07-09 18:47:29,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252193740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:29,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997700980] [2021-07-09 18:47:29,824 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:29,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:29,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:29,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:47:29,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:29,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997700980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:29,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:29,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:47:29,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918908785] [2021-07-09 18:47:29,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:47:29,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:29,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:47:29,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:29,900 INFO L87 Difference]: Start difference. First operand 27223 states and 124706 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:47:30,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:30,220 INFO L93 Difference]: Finished difference Result 29638 states and 134233 transitions. [2021-07-09 18:47:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:47:30,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:47:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:30,356 INFO L225 Difference]: With dead ends: 29638 [2021-07-09 18:47:30,356 INFO L226 Difference]: Without dead ends: 29562 [2021-07-09 18:47:30,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29562 states. [2021-07-09 18:47:31,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29562 to 27293. [2021-07-09 18:47:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27293 states, 27292 states have (on average 4.584017294445259) internal successors, (125107), 27292 states have internal predecessors, (125107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27293 states to 27293 states and 125107 transitions. [2021-07-09 18:47:31,396 INFO L78 Accepts]: Start accepts. Automaton has 27293 states and 125107 transitions. Word has length 25 [2021-07-09 18:47:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:31,396 INFO L482 AbstractCegarLoop]: Abstraction has 27293 states and 125107 transitions. [2021-07-09 18:47:31,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:47:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 27293 states and 125107 transitions. [2021-07-09 18:47:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:31,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:31,467 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:31,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-09 18:47:31,668 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:31,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1704182322, now seen corresponding path program 6 times [2021-07-09 18:47:31,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:31,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904884059] [2021-07-09 18:47:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:31,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:31,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904884059] [2021-07-09 18:47:31,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904884059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:31,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77856150] [2021-07-09 18:47:31,760 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:31,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:47:31,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:31,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:47:31,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:31,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77856150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:31,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:31,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:47:31,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416712011] [2021-07-09 18:47:31,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:47:31,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:31,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:47:31,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:31,840 INFO L87 Difference]: Start difference. First operand 27293 states and 125107 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:47:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:32,224 INFO L93 Difference]: Finished difference Result 29552 states and 134049 transitions. [2021-07-09 18:47:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:47:32,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:47:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:32,646 INFO L225 Difference]: With dead ends: 29552 [2021-07-09 18:47:32,646 INFO L226 Difference]: Without dead ends: 29476 [2021-07-09 18:47:32,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:32,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29476 states. [2021-07-09 18:47:33,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29476 to 27436. [2021-07-09 18:47:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27436 states, 27435 states have (on average 4.586477127756515) internal successors, (125830), 27435 states have internal predecessors, (125830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:33,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27436 states to 27436 states and 125830 transitions. [2021-07-09 18:47:33,464 INFO L78 Accepts]: Start accepts. Automaton has 27436 states and 125830 transitions. Word has length 25 [2021-07-09 18:47:33,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:33,464 INFO L482 AbstractCegarLoop]: Abstraction has 27436 states and 125830 transitions. [2021-07-09 18:47:33,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:47:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 27436 states and 125830 transitions. [2021-07-09 18:47:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:33,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:33,543 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] [2021-07-09 18:47:33,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:33,744 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:33,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:33,744 INFO L82 PathProgramCache]: Analyzing trace with hash -605061554, now seen corresponding path program 9 times [2021-07-09 18:47:33,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:33,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017798043] [2021-07-09 18:47:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:33,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:33,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017798043] [2021-07-09 18:47:33,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017798043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:33,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260380461] [2021-07-09 18:47:33,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:33,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:47:33,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:33,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:47:33,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:33,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260380461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:33,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:33,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 18:47:33,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400330819] [2021-07-09 18:47:33,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:47:33,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:33,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:47:33,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:47:33,881 INFO L87 Difference]: Start difference. First operand 27436 states and 125830 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:34,789 INFO L93 Difference]: Finished difference Result 58244 states and 263402 transitions. [2021-07-09 18:47:34,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:47:34,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:47:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:35,067 INFO L225 Difference]: With dead ends: 58244 [2021-07-09 18:47:35,067 INFO L226 Difference]: Without dead ends: 58083 [2021-07-09 18:47:35,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:47:35,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58083 states. [2021-07-09 18:47:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58083 to 50808. [2021-07-09 18:47:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50808 states, 50807 states have (on average 4.5649615210502485) internal successors, (231932), 50807 states have internal predecessors, (231932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:37,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50808 states to 50808 states and 231932 transitions. [2021-07-09 18:47:37,050 INFO L78 Accepts]: Start accepts. Automaton has 50808 states and 231932 transitions. Word has length 25 [2021-07-09 18:47:37,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:37,050 INFO L482 AbstractCegarLoop]: Abstraction has 50808 states and 231932 transitions. [2021-07-09 18:47:37,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:37,051 INFO L276 IsEmpty]: Start isEmpty. Operand 50808 states and 231932 transitions. [2021-07-09 18:47:37,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:37,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:37,177 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] [2021-07-09 18:47:37,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 18:47:37,378 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:37,378 INFO L82 PathProgramCache]: Analyzing trace with hash -535167990, now seen corresponding path program 10 times [2021-07-09 18:47:37,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:37,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648726088] [2021-07-09 18:47:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:37,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:37,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648726088] [2021-07-09 18:47:37,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648726088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:37,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866970656] [2021-07-09 18:47:37,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:37,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:37,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:37,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:47:37,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:37,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866970656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:37,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:37,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 18:47:37,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979542268] [2021-07-09 18:47:37,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:47:37,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:37,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:47:37,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:47:37,508 INFO L87 Difference]: Start difference. First operand 50808 states and 231932 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:37,892 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2021-07-09 18:47:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:38,973 INFO L93 Difference]: Finished difference Result 83779 states and 378490 transitions. [2021-07-09 18:47:38,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:47:38,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:47:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:39,420 INFO L225 Difference]: With dead ends: 83779 [2021-07-09 18:47:39,420 INFO L226 Difference]: Without dead ends: 83779 [2021-07-09 18:47:39,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:47:39,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83779 states. [2021-07-09 18:47:41,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83779 to 72653. [2021-07-09 18:47:41,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72653 states, 72652 states have (on average 4.592110334195893) internal successors, (333626), 72652 states have internal predecessors, (333626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72653 states to 72653 states and 333626 transitions. [2021-07-09 18:47:42,347 INFO L78 Accepts]: Start accepts. Automaton has 72653 states and 333626 transitions. Word has length 25 [2021-07-09 18:47:42,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:42,347 INFO L482 AbstractCegarLoop]: Abstraction has 72653 states and 333626 transitions. [2021-07-09 18:47:42,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:42,347 INFO L276 IsEmpty]: Start isEmpty. Operand 72653 states and 333626 transitions. [2021-07-09 18:47:42,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:42,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:42,554 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:42,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 18:47:42,754 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:42,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:42,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2017642098, now seen corresponding path program 7 times [2021-07-09 18:47:42,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:42,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006307249] [2021-07-09 18:47:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:42,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:42,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006307249] [2021-07-09 18:47:42,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006307249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:42,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396331320] [2021-07-09 18:47:42,845 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:42,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:47:42,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:42,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396331320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:42,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:42,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:47:42,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062926389] [2021-07-09 18:47:42,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:47:42,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:42,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:47:42,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:42,935 INFO L87 Difference]: Start difference. First operand 72653 states and 333626 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:47:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:43,963 INFO L93 Difference]: Finished difference Result 74099 states and 339316 transitions. [2021-07-09 18:47:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:47:43,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:47:43,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:44,632 INFO L225 Difference]: With dead ends: 74099 [2021-07-09 18:47:44,632 INFO L226 Difference]: Without dead ends: 74023 [2021-07-09 18:47:44,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:44,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74023 states. [2021-07-09 18:47:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74023 to 72711. [2021-07-09 18:47:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72711 states, 72710 states have (on average 4.592366937147572) internal successors, (333911), 72710 states have internal predecessors, (333911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72711 states to 72711 states and 333911 transitions. [2021-07-09 18:47:47,260 INFO L78 Accepts]: Start accepts. Automaton has 72711 states and 333911 transitions. Word has length 25 [2021-07-09 18:47:47,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:47,261 INFO L482 AbstractCegarLoop]: Abstraction has 72711 states and 333911 transitions. [2021-07-09 18:47:47,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:47:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 72711 states and 333911 transitions. [2021-07-09 18:47:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:47,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:47,454 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:47,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 18:47:47,655 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:47,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash -660900726, now seen corresponding path program 8 times [2021-07-09 18:47:47,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:47,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851819852] [2021-07-09 18:47:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:47,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:47,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851819852] [2021-07-09 18:47:47,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851819852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:47,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987341331] [2021-07-09 18:47:47,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:47,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:47,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:47,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:47:47,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:47,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987341331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:47,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:47,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:47:47,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569201171] [2021-07-09 18:47:47,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:47:47,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:47,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:47:47,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:47,821 INFO L87 Difference]: Start difference. First operand 72711 states and 333911 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:47:49,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:49,091 INFO L93 Difference]: Finished difference Result 73874 states and 338535 transitions. [2021-07-09 18:47:49,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:47:49,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:47:49,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:49,494 INFO L225 Difference]: With dead ends: 73874 [2021-07-09 18:47:49,494 INFO L226 Difference]: Without dead ends: 73798 [2021-07-09 18:47:49,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:47:49,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73798 states. [2021-07-09 18:47:51,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73798 to 72769. [2021-07-09 18:47:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72769 states, 72768 states have (on average 4.592650615655233) internal successors, (334198), 72768 states have internal predecessors, (334198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72769 states to 72769 states and 334198 transitions. [2021-07-09 18:47:52,436 INFO L78 Accepts]: Start accepts. Automaton has 72769 states and 334198 transitions. Word has length 25 [2021-07-09 18:47:52,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:52,437 INFO L482 AbstractCegarLoop]: Abstraction has 72769 states and 334198 transitions. [2021-07-09 18:47:52,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:47:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 72769 states and 334198 transitions. [2021-07-09 18:47:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:47:52,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:52,745 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, 1, 1, 1] [2021-07-09 18:47:52,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 18:47:52,961 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2072982634, now seen corresponding path program 11 times [2021-07-09 18:47:52,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:52,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319132235] [2021-07-09 18:47:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:52,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:52,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319132235] [2021-07-09 18:47:52,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319132235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:52,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215296191] [2021-07-09 18:47:52,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:53,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:53,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:53,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:47:53,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:53,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215296191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:53,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:53,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:47:53,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338012794] [2021-07-09 18:47:53,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:47:53,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:53,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:47:53,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:47:53,121 INFO L87 Difference]: Start difference. First operand 72769 states and 334198 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:55,007 INFO L93 Difference]: Finished difference Result 113780 states and 518908 transitions. [2021-07-09 18:47:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:47:55,007 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:47:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:55,677 INFO L225 Difference]: With dead ends: 113780 [2021-07-09 18:47:55,677 INFO L226 Difference]: Without dead ends: 113660 [2021-07-09 18:47:55,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:47:55,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113660 states. [2021-07-09 18:47:58,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113660 to 97354. [2021-07-09 18:47:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97354 states, 97353 states have (on average 4.601532567049809) internal successors, (447973), 97353 states have internal predecessors, (447973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:59,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97354 states to 97354 states and 447973 transitions. [2021-07-09 18:47:59,704 INFO L78 Accepts]: Start accepts. Automaton has 97354 states and 447973 transitions. Word has length 25 [2021-07-09 18:47:59,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:59,704 INFO L482 AbstractCegarLoop]: Abstraction has 97354 states and 447973 transitions. [2021-07-09 18:47:59,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:59,704 INFO L276 IsEmpty]: Start isEmpty. Operand 97354 states and 447973 transitions. [2021-07-09 18:48:00,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:48:00,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:00,369 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] [2021-07-09 18:48:00,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:00,585 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:00,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:00,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1816187858, now seen corresponding path program 12 times [2021-07-09 18:48:00,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:00,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736810283] [2021-07-09 18:48:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:00,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:00,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736810283] [2021-07-09 18:48:00,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736810283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:00,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959778476] [2021-07-09 18:48:00,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:00,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:48:00,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:00,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:48:00,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:00,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959778476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:00,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:00,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:48:00,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228142532] [2021-07-09 18:48:00,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:48:00,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:00,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:48:00,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:48:00,752 INFO L87 Difference]: Start difference. First operand 97354 states and 447973 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:03,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:03,374 INFO L93 Difference]: Finished difference Result 199161 states and 905866 transitions. [2021-07-09 18:48:03,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:48:03,374 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:48:03,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:04,659 INFO L225 Difference]: With dead ends: 199161 [2021-07-09 18:48:04,660 INFO L226 Difference]: Without dead ends: 199068 [2021-07-09 18:48:04,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:48:05,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199068 states. [2021-07-09 18:48:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199068 to 126471. [2021-07-09 18:48:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126471 states, 126470 states have (on average 4.598568830552701) internal successors, (581581), 126470 states have internal predecessors, (581581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126471 states to 126471 states and 581581 transitions. [2021-07-09 18:48:11,671 INFO L78 Accepts]: Start accepts. Automaton has 126471 states and 581581 transitions. Word has length 25 [2021-07-09 18:48:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:11,671 INFO L482 AbstractCegarLoop]: Abstraction has 126471 states and 581581 transitions. [2021-07-09 18:48:11,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:11,672 INFO L276 IsEmpty]: Start isEmpty. Operand 126471 states and 581581 transitions. [2021-07-09 18:48:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:48:12,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:12,028 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] [2021-07-09 18:48:12,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 18:48:12,230 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:12,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1050269714, now seen corresponding path program 13 times [2021-07-09 18:48:12,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:12,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967372688] [2021-07-09 18:48:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:12,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:12,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967372688] [2021-07-09 18:48:12,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967372688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:12,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419336577] [2021-07-09 18:48:12,644 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:12,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:48:12,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:12,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419336577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:12,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:12,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:48:12,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001814017] [2021-07-09 18:48:12,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:48:12,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:12,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:48:12,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:48:12,763 INFO L87 Difference]: Start difference. First operand 126471 states and 581581 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:15,032 INFO L93 Difference]: Finished difference Result 206475 states and 937233 transitions. [2021-07-09 18:48:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:48:15,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:48:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:16,686 INFO L225 Difference]: With dead ends: 206475 [2021-07-09 18:48:16,686 INFO L226 Difference]: Without dead ends: 206475 [2021-07-09 18:48:16,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:48:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206475 states. [2021-07-09 18:48:22,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206475 to 146245. [2021-07-09 18:48:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146245 states, 146244 states have (on average 4.6125037608380515) internal successors, (674551), 146244 states have internal predecessors, (674551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146245 states to 146245 states and 674551 transitions. [2021-07-09 18:48:24,611 INFO L78 Accepts]: Start accepts. Automaton has 146245 states and 674551 transitions. Word has length 25 [2021-07-09 18:48:24,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:24,611 INFO L482 AbstractCegarLoop]: Abstraction has 146245 states and 674551 transitions. [2021-07-09 18:48:24,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:24,611 INFO L276 IsEmpty]: Start isEmpty. Operand 146245 states and 674551 transitions. [2021-07-09 18:48:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:48:25,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:25,468 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] [2021-07-09 18:48:25,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:25,685 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:25,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:25,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2033215848, now seen corresponding path program 14 times [2021-07-09 18:48:25,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:25,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674390517] [2021-07-09 18:48:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:25,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:25,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674390517] [2021-07-09 18:48:25,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674390517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:25,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747330485] [2021-07-09 18:48:25,746 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:25,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:48:25,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:25,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:48:25,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:25,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747330485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:25,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:25,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-07-09 18:48:25,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850750148] [2021-07-09 18:48:25,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:48:25,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:25,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:48:25,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:48:25,918 INFO L87 Difference]: Start difference. First operand 146245 states and 674551 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:28,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:28,809 INFO L93 Difference]: Finished difference Result 158888 states and 723911 transitions. [2021-07-09 18:48:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:48:28,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:48:28,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:30,540 INFO L225 Difference]: With dead ends: 158888 [2021-07-09 18:48:30,540 INFO L226 Difference]: Without dead ends: 158813 [2021-07-09 18:48:30,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:48:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158813 states. [2021-07-09 18:48:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158813 to 150237. [2021-07-09 18:48:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150237 states, 150236 states have (on average 4.599729758513273) internal successors, (691045), 150236 states have internal predecessors, (691045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150237 states to 150237 states and 691045 transitions. [2021-07-09 18:48:36,663 INFO L78 Accepts]: Start accepts. Automaton has 150237 states and 691045 transitions. Word has length 25 [2021-07-09 18:48:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:36,664 INFO L482 AbstractCegarLoop]: Abstraction has 150237 states and 691045 transitions. [2021-07-09 18:48:36,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 150237 states and 691045 transitions. [2021-07-09 18:48:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:48:37,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:37,557 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] [2021-07-09 18:48:37,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:37,757 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:37,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:37,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1990562746, now seen corresponding path program 15 times [2021-07-09 18:48:37,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:37,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609191094] [2021-07-09 18:48:37,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:37,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:37,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609191094] [2021-07-09 18:48:37,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609191094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:37,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330380611] [2021-07-09 18:48:37,806 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:37,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:48:37,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:37,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:48:37,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:37,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330380611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:37,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:37,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:48:37,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48917854] [2021-07-09 18:48:37,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:48:37,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:37,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:48:37,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:48:37,958 INFO L87 Difference]: Start difference. First operand 150237 states and 691045 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:41,745 INFO L93 Difference]: Finished difference Result 274279 states and 1232729 transitions. [2021-07-09 18:48:41,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:48:41,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:48:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:43,964 INFO L225 Difference]: With dead ends: 274279 [2021-07-09 18:48:43,964 INFO L226 Difference]: Without dead ends: 274261 [2021-07-09 18:48:43,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 321.4ms TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:48:44,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274261 states. [2021-07-09 18:48:50,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274261 to 150288. [2021-07-09 18:48:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150288 states, 150287 states have (on average 4.600091824309488) internal successors, (691334), 150287 states have internal predecessors, (691334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150288 states to 150288 states and 691334 transitions. [2021-07-09 18:48:52,871 INFO L78 Accepts]: Start accepts. Automaton has 150288 states and 691334 transitions. Word has length 25 [2021-07-09 18:48:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:52,872 INFO L482 AbstractCegarLoop]: Abstraction has 150288 states and 691334 transitions. [2021-07-09 18:48:52,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 150288 states and 691334 transitions. [2021-07-09 18:48:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:48:53,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:53,323 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] [2021-07-09 18:48:53,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 18:48:53,524 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:53,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:53,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1538486406, now seen corresponding path program 16 times [2021-07-09 18:48:53,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:53,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470089386] [2021-07-09 18:48:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:53,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:53,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470089386] [2021-07-09 18:48:53,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470089386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:53,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875472485] [2021-07-09 18:48:53,572 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:53,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:48:53,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:53,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:48:53,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:53,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875472485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:53,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:53,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:48:53,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341501856] [2021-07-09 18:48:53,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:48:53,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:53,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:48:53,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:48:53,738 INFO L87 Difference]: Start difference. First operand 150288 states and 691334 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) [2021-07-09 18:48:57,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:57,479 INFO L93 Difference]: Finished difference Result 228605 states and 1039503 transitions. [2021-07-09 18:48:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:48:57,493 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 25 [2021-07-09 18:48:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:59,425 INFO L225 Difference]: With dead ends: 228605 [2021-07-09 18:48:59,425 INFO L226 Difference]: Without dead ends: 228605 [2021-07-09 18:48:59,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 227.2ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:48:59,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228605 states. [2021-07-09 18:49:05,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228605 to 150267. [2021-07-09 18:49:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150267 states, 150266 states have (on average 4.600089175195985) internal successors, (691237), 150266 states have internal predecessors, (691237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150267 states to 150267 states and 691237 transitions. [2021-07-09 18:49:06,911 INFO L78 Accepts]: Start accepts. Automaton has 150267 states and 691237 transitions. Word has length 25 [2021-07-09 18:49:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:06,911 INFO L482 AbstractCegarLoop]: Abstraction has 150267 states and 691237 transitions. [2021-07-09 18:49:06,911 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) [2021-07-09 18:49:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 150267 states and 691237 transitions. [2021-07-09 18:49:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:49:07,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:07,317 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] [2021-07-09 18:49:07,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:07,518 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:07,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:07,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1939792664, now seen corresponding path program 17 times [2021-07-09 18:49:07,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:07,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043872155] [2021-07-09 18:49:07,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:07,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:07,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043872155] [2021-07-09 18:49:07,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043872155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:07,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615005770] [2021-07-09 18:49:07,580 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:07,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:49:07,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:07,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:49:07,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:07,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615005770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:07,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:07,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:49:07,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448357668] [2021-07-09 18:49:07,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:49:07,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:07,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:49:07,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:49:07,714 INFO L87 Difference]: Start difference. First operand 150267 states and 691237 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:10,149 INFO L93 Difference]: Finished difference Result 181963 states and 827326 transitions. [2021-07-09 18:49:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:49:10,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:49:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:11,602 INFO L225 Difference]: With dead ends: 181963 [2021-07-09 18:49:11,602 INFO L226 Difference]: Without dead ends: 181963 [2021-07-09 18:49:11,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:49:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181963 states. [2021-07-09 18:49:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181963 to 150263. [2021-07-09 18:49:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150263 states, 150262 states have (on average 4.600091839586855) internal successors, (691219), 150262 states have internal predecessors, (691219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150263 states to 150263 states and 691219 transitions. [2021-07-09 18:49:17,939 INFO L78 Accepts]: Start accepts. Automaton has 150263 states and 691219 transitions. Word has length 25 [2021-07-09 18:49:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:17,939 INFO L482 AbstractCegarLoop]: Abstraction has 150263 states and 691219 transitions. [2021-07-09 18:49:17,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 150263 states and 691219 transitions. [2021-07-09 18:49:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:49:18,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:18,850 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] [2021-07-09 18:49:19,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 18:49:19,051 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:19,051 INFO L82 PathProgramCache]: Analyzing trace with hash -186895918, now seen corresponding path program 18 times [2021-07-09 18:49:19,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:19,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912392754] [2021-07-09 18:49:19,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:19,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:19,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912392754] [2021-07-09 18:49:19,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912392754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:19,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074110904] [2021-07-09 18:49:19,105 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:19,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:49:19,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:19,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:49:19,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:19,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074110904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:19,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:19,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-07-09 18:49:19,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59096401] [2021-07-09 18:49:19,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:49:19,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:19,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:49:19,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:49:19,243 INFO L87 Difference]: Start difference. First operand 150263 states and 691219 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) 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) [2021-07-09 18:49:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:21,871 INFO L93 Difference]: Finished difference Result 192198 states and 881415 transitions. [2021-07-09 18:49:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:49:21,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) 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 25 [2021-07-09 18:49:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:23,173 INFO L225 Difference]: With dead ends: 192198 [2021-07-09 18:49:23,173 INFO L226 Difference]: Without dead ends: 192052 [2021-07-09 18:49:23,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:49:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192052 states. [2021-07-09 18:49:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192052 to 150747. [2021-07-09 18:49:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150747 states, 150746 states have (on average 4.600427208682154) internal successors, (693496), 150746 states have internal predecessors, (693496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150747 states to 150747 states and 693496 transitions. [2021-07-09 18:49:31,131 INFO L78 Accepts]: Start accepts. Automaton has 150747 states and 693496 transitions. Word has length 25 [2021-07-09 18:49:31,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:31,131 INFO L482 AbstractCegarLoop]: Abstraction has 150747 states and 693496 transitions. [2021-07-09 18:49:31,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) 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) [2021-07-09 18:49:31,132 INFO L276 IsEmpty]: Start isEmpty. Operand 150747 states and 693496 transitions. [2021-07-09 18:49:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:49:32,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:32,189 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] [2021-07-09 18:49:32,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:32,413 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:32,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:32,413 INFO L82 PathProgramCache]: Analyzing trace with hash -567050456, now seen corresponding path program 19 times [2021-07-09 18:49:32,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:32,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40307381] [2021-07-09 18:49:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:32,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:32,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40307381] [2021-07-09 18:49:32,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40307381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:32,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606818728] [2021-07-09 18:49:32,515 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:32,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:49:32,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:32,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606818728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:32,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:32,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-07-09 18:49:32,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213358553] [2021-07-09 18:49:32,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:49:32,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:32,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:49:32,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:49:32,742 INFO L87 Difference]: Start difference. First operand 150747 states and 693496 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:35,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:35,052 INFO L93 Difference]: Finished difference Result 151664 states and 696652 transitions. [2021-07-09 18:49:35,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:49:35,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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 25 [2021-07-09 18:49:35,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:36,811 INFO L225 Difference]: With dead ends: 151664 [2021-07-09 18:49:36,811 INFO L226 Difference]: Without dead ends: 151407 [2021-07-09 18:49:36,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:49:37,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151407 states. [2021-07-09 18:49:41,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151407 to 150715. [2021-07-09 18:49:41,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150715 states, 150714 states have (on average 4.600030521384874) internal successors, (693289), 150714 states have internal predecessors, (693289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:43,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150715 states to 150715 states and 693289 transitions. [2021-07-09 18:49:43,041 INFO L78 Accepts]: Start accepts. Automaton has 150715 states and 693289 transitions. Word has length 25 [2021-07-09 18:49:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:43,041 INFO L482 AbstractCegarLoop]: Abstraction has 150715 states and 693289 transitions. [2021-07-09 18:49:43,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 150715 states and 693289 transitions. [2021-07-09 18:49:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:49:43,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:43,465 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] [2021-07-09 18:49:43,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 18:49:43,669 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:43,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1169845454, now seen corresponding path program 20 times [2021-07-09 18:49:43,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:43,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521326964] [2021-07-09 18:49:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:43,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:43,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521326964] [2021-07-09 18:49:43,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521326964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:43,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854546358] [2021-07-09 18:49:43,733 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:43,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:49:43,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:43,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:49:43,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:43,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854546358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:43,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:43,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-09 18:49:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580656230] [2021-07-09 18:49:43,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:49:43,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:43,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:49:43,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:49:43,891 INFO L87 Difference]: Start difference. First operand 150715 states and 693289 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:44,401 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2021-07-09 18:49:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:46,380 INFO L93 Difference]: Finished difference Result 193192 states and 885923 transitions. [2021-07-09 18:49:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:49:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:49:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:48,159 INFO L225 Difference]: With dead ends: 193192 [2021-07-09 18:49:48,159 INFO L226 Difference]: Without dead ends: 193064 [2021-07-09 18:49:48,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 439.7ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:49:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193064 states. [2021-07-09 18:49:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193064 to 150929. [2021-07-09 18:49:53,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150929 states, 150928 states have (on average 4.599756175129864) internal successors, (694232), 150928 states have internal predecessors, (694232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150929 states to 150929 states and 694232 transitions. [2021-07-09 18:49:55,358 INFO L78 Accepts]: Start accepts. Automaton has 150929 states and 694232 transitions. Word has length 25 [2021-07-09 18:49:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:55,358 INFO L482 AbstractCegarLoop]: Abstraction has 150929 states and 694232 transitions. [2021-07-09 18:49:55,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 150929 states and 694232 transitions. [2021-07-09 18:49:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:49:56,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:56,375 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:56,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:49:56,597 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:56,598 INFO L82 PathProgramCache]: Analyzing trace with hash 919442638, now seen corresponding path program 8 times [2021-07-09 18:49:56,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:56,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584867683] [2021-07-09 18:49:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:56,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:56,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584867683] [2021-07-09 18:49:56,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584867683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:56,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932312592] [2021-07-09 18:49:56,636 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:56,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:49:56,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:56,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:49:56,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:56,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932312592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:56,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:56,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:49:56,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042831462] [2021-07-09 18:49:56,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:49:56,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:56,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:49:56,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:49:56,790 INFO L87 Difference]: Start difference. First operand 150929 states and 694232 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:59,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:59,517 INFO L93 Difference]: Finished difference Result 156612 states and 717259 transitions. [2021-07-09 18:49:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:49:59,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:49:59,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:01,409 INFO L225 Difference]: With dead ends: 156612 [2021-07-09 18:50:01,410 INFO L226 Difference]: Without dead ends: 156525 [2021-07-09 18:50:01,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:50:01,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156525 states. [2021-07-09 18:50:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156525 to 152518. [2021-07-09 18:50:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152518 states, 152517 states have (on average 4.600287181101123) internal successors, (701622), 152517 states have internal predecessors, (701622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152518 states to 152518 states and 701622 transitions. [2021-07-09 18:50:07,819 INFO L78 Accepts]: Start accepts. Automaton has 152518 states and 701622 transitions. Word has length 25 [2021-07-09 18:50:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:07,820 INFO L482 AbstractCegarLoop]: Abstraction has 152518 states and 701622 transitions. [2021-07-09 18:50:07,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 152518 states and 701622 transitions. [2021-07-09 18:50:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:50:08,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:08,644 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] [2021-07-09 18:50:08,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:08,857 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:08,857 INFO L82 PathProgramCache]: Analyzing trace with hash 920853582, now seen corresponding path program 4 times [2021-07-09 18:50:08,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:08,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745725386] [2021-07-09 18:50:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:08,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:08,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745725386] [2021-07-09 18:50:08,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745725386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:08,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042723097] [2021-07-09 18:50:08,894 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:08,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:50:08,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:08,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:50:08,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:08,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042723097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:08,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:08,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:50:08,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561822355] [2021-07-09 18:50:08,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:50:08,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:08,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:50:08,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:50:08,987 INFO L87 Difference]: Start difference. First operand 152518 states and 701622 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:11,001 INFO L93 Difference]: Finished difference Result 156333 states and 716897 transitions. [2021-07-09 18:50:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:50:11,001 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:50:11,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:11,985 INFO L225 Difference]: With dead ends: 156333 [2021-07-09 18:50:11,985 INFO L226 Difference]: Without dead ends: 156315 [2021-07-09 18:50:12,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:50:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156315 states. [2021-07-09 18:50:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156315 to 152720. [2021-07-09 18:50:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152720 states, 152719 states have (on average 4.600062860547803) internal successors, (702517), 152719 states have internal predecessors, (702517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:18,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152720 states to 152720 states and 702517 transitions. [2021-07-09 18:50:18,663 INFO L78 Accepts]: Start accepts. Automaton has 152720 states and 702517 transitions. Word has length 25 [2021-07-09 18:50:18,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:18,663 INFO L482 AbstractCegarLoop]: Abstraction has 152720 states and 702517 transitions. [2021-07-09 18:50:18,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:18,663 INFO L276 IsEmpty]: Start isEmpty. Operand 152720 states and 702517 transitions. [2021-07-09 18:50:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:50:19,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:19,463 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] [2021-07-09 18:50:19,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 18:50:19,685 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:19,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:19,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1371587662, now seen corresponding path program 5 times [2021-07-09 18:50:19,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:19,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426039356] [2021-07-09 18:50:19,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:19,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:19,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426039356] [2021-07-09 18:50:19,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426039356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:19,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292073046] [2021-07-09 18:50:19,730 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:19,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:50:19,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:19,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:50:19,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:19,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292073046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:19,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:19,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:50:19,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110674968] [2021-07-09 18:50:19,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:50:19,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:19,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:50:19,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:50:19,864 INFO L87 Difference]: Start difference. First operand 152720 states and 702517 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:22,874 INFO L93 Difference]: Finished difference Result 161541 states and 737182 transitions. [2021-07-09 18:50:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:50:22,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:50:22,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:24,854 INFO L225 Difference]: With dead ends: 161541 [2021-07-09 18:50:24,855 INFO L226 Difference]: Without dead ends: 161541 [2021-07-09 18:50:24,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:50:25,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161541 states. [2021-07-09 18:50:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161541 to 152520. [2021-07-09 18:50:29,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152520 states, 152519 states have (on average 4.598823753106171) internal successors, (701408), 152519 states have internal predecessors, (701408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152520 states to 152520 states and 701408 transitions. [2021-07-09 18:50:31,096 INFO L78 Accepts]: Start accepts. Automaton has 152520 states and 701408 transitions. Word has length 25 [2021-07-09 18:50:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:31,096 INFO L482 AbstractCegarLoop]: Abstraction has 152520 states and 701408 transitions. [2021-07-09 18:50:31,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 152520 states and 701408 transitions. [2021-07-09 18:50:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:50:31,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:31,964 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] [2021-07-09 18:50:32,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:32,169 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:32,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:32,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1828705168, now seen corresponding path program 6 times [2021-07-09 18:50:32,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:32,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020595864] [2021-07-09 18:50:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:32,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:32,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020595864] [2021-07-09 18:50:32,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020595864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:32,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511212583] [2021-07-09 18:50:32,205 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:32,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:50:32,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:32,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:50:32,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:32,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511212583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:32,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:32,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:50:32,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495945223] [2021-07-09 18:50:32,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:50:32,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:32,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:50:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:50:32,310 INFO L87 Difference]: Start difference. First operand 152520 states and 701408 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:34,206 INFO L93 Difference]: Finished difference Result 156029 states and 715406 transitions. [2021-07-09 18:50:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:50:34,207 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 [2021-07-09 18:50:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:35,505 INFO L225 Difference]: With dead ends: 156029 [2021-07-09 18:50:35,505 INFO L226 Difference]: Without dead ends: 156011 [2021-07-09 18:50:35,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:50:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156011 states. [2021-07-09 18:50:40,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156011 to 152534. [2021-07-09 18:50:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152534 states, 152533 states have (on average 4.598604892056145) internal successors, (701439), 152533 states have internal predecessors, (701439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152534 states to 152534 states and 701439 transitions. [2021-07-09 18:50:41,876 INFO L78 Accepts]: Start accepts. Automaton has 152534 states and 701439 transitions. Word has length 25 [2021-07-09 18:50:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:41,876 INFO L482 AbstractCegarLoop]: Abstraction has 152534 states and 701439 transitions. [2021-07-09 18:50:41,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 152534 states and 701439 transitions. [2021-07-09 18:50:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:50:42,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:42,695 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] [2021-07-09 18:50:42,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-09 18:50:42,909 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:42,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:42,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1290086910, now seen corresponding path program 7 times [2021-07-09 18:50:42,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:42,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341026699] [2021-07-09 18:50:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:42,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:42,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341026699] [2021-07-09 18:50:42,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341026699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:42,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784320774] [2021-07-09 18:50:42,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:42,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:50:42,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:43,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784320774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:43,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:43,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:50:43,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868833243] [2021-07-09 18:50:43,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:50:43,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:43,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:50:43,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:50:43,062 INFO L87 Difference]: Start difference. First operand 152534 states and 701439 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:45,771 INFO L93 Difference]: Finished difference Result 187205 states and 846532 transitions. [2021-07-09 18:50:45,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:50:45,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 [2021-07-09 18:50:45,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:48,207 INFO L225 Difference]: With dead ends: 187205 [2021-07-09 18:50:48,207 INFO L226 Difference]: Without dead ends: 187205 [2021-07-09 18:50:48,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:50:48,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187205 states. [2021-07-09 18:50:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187205 to 152752. [2021-07-09 18:50:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152752 states, 152751 states have (on average 4.597796413771432) internal successors, (702318), 152751 states have internal predecessors, (702318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152752 states to 152752 states and 702318 transitions. [2021-07-09 18:50:54,857 INFO L78 Accepts]: Start accepts. Automaton has 152752 states and 702318 transitions. Word has length 25 [2021-07-09 18:50:54,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:54,857 INFO L482 AbstractCegarLoop]: Abstraction has 152752 states and 702318 transitions. [2021-07-09 18:50:54,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 152752 states and 702318 transitions. [2021-07-09 18:50:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:50:55,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:55,718 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] [2021-07-09 18:50:55,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:55,919 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:55,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:55,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2119082106, now seen corresponding path program 8 times [2021-07-09 18:50:55,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:55,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24024075] [2021-07-09 18:50:55,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:55,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:55,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24024075] [2021-07-09 18:50:55,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24024075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:55,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491938482] [2021-07-09 18:50:55,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:56,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:50:56,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:56,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:50:56,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:56,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491938482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:56,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:56,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:50:56,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43512437] [2021-07-09 18:50:56,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:50:56,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:56,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:50:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:50:56,106 INFO L87 Difference]: Start difference. First operand 152752 states and 702318 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:57,966 INFO L93 Difference]: Finished difference Result 153348 states and 704507 transitions. [2021-07-09 18:50:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:50:57,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 [2021-07-09 18:50:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:59,223 INFO L225 Difference]: With dead ends: 153348 [2021-07-09 18:50:59,223 INFO L226 Difference]: Without dead ends: 153248 [2021-07-09 18:50:59,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:50:59,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153248 states. [2021-07-09 18:51:03,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153248 to 152808. [2021-07-09 18:51:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152808 states, 152807 states have (on average 4.597446452060442) internal successors, (702522), 152807 states have internal predecessors, (702522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:05,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152808 states to 152808 states and 702522 transitions. [2021-07-09 18:51:05,429 INFO L78 Accepts]: Start accepts. Automaton has 152808 states and 702522 transitions. Word has length 25 [2021-07-09 18:51:05,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:05,429 INFO L482 AbstractCegarLoop]: Abstraction has 152808 states and 702522 transitions. [2021-07-09 18:51:05,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 152808 states and 702522 transitions. [2021-07-09 18:51:06,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:51:06,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:06,174 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] [2021-07-09 18:51:06,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:06,375 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:06,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:06,375 INFO L82 PathProgramCache]: Analyzing trace with hash -656052858, now seen corresponding path program 9 times [2021-07-09 18:51:06,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:06,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025610411] [2021-07-09 18:51:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:06,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:06,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025610411] [2021-07-09 18:51:06,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025610411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:06,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237859943] [2021-07-09 18:51:06,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:06,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:51:06,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:06,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:51:06,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:06,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237859943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:06,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:06,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:51:06,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828774610] [2021-07-09 18:51:06,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:51:06,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:06,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:51:06,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:51:06,513 INFO L87 Difference]: Start difference. First operand 152808 states and 702522 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:09,557 INFO L93 Difference]: Finished difference Result 254992 states and 1153363 transitions. [2021-07-09 18:51:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:51:09,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) 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 25 [2021-07-09 18:51:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:11,535 INFO L225 Difference]: With dead ends: 254992 [2021-07-09 18:51:11,536 INFO L226 Difference]: Without dead ends: 254992 [2021-07-09 18:51:11,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:51:11,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254992 states. [2021-07-09 18:51:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254992 to 167585. [2021-07-09 18:51:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167585 states, 167584 states have (on average 4.616341655527974) internal successors, (773625), 167584 states have internal predecessors, (773625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167585 states to 167585 states and 773625 transitions. [2021-07-09 18:51:22,176 INFO L78 Accepts]: Start accepts. Automaton has 167585 states and 773625 transitions. Word has length 25 [2021-07-09 18:51:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:22,176 INFO L482 AbstractCegarLoop]: Abstraction has 167585 states and 773625 transitions. [2021-07-09 18:51:22,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 167585 states and 773625 transitions. [2021-07-09 18:51:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:51:23,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:23,072 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] [2021-07-09 18:51:23,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:23,295 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1715216728, now seen corresponding path program 10 times [2021-07-09 18:51:23,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:23,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320286358] [2021-07-09 18:51:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:23,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:23,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320286358] [2021-07-09 18:51:23,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320286358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:23,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827687638] [2021-07-09 18:51:23,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:23,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:51:23,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:23,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:51:23,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:23,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827687638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:23,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:23,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:51:23,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496985924] [2021-07-09 18:51:23,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:51:23,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:23,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:51:23,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:51:23,506 INFO L87 Difference]: Start difference. First operand 167585 states and 773625 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:26,629 INFO L93 Difference]: Finished difference Result 216803 states and 978719 transitions. [2021-07-09 18:51:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:51:26,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 [2021-07-09 18:51:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:28,356 INFO L225 Difference]: With dead ends: 216803 [2021-07-09 18:51:28,356 INFO L226 Difference]: Without dead ends: 216803 [2021-07-09 18:51:28,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:51:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216803 states. [2021-07-09 18:51:35,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216803 to 169071. [2021-07-09 18:51:35,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169071 states, 169070 states have (on average 4.613083338262258) internal successors, (779934), 169070 states have internal predecessors, (779934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169071 states to 169071 states and 779934 transitions. [2021-07-09 18:51:36,631 INFO L78 Accepts]: Start accepts. Automaton has 169071 states and 779934 transitions. Word has length 25 [2021-07-09 18:51:36,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:36,631 INFO L482 AbstractCegarLoop]: Abstraction has 169071 states and 779934 transitions. [2021-07-09 18:51:36,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 169071 states and 779934 transitions. [2021-07-09 18:51:37,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:51:37,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:37,577 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] [2021-07-09 18:51:37,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:37,785 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:37,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:37,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1504675330, now seen corresponding path program 11 times [2021-07-09 18:51:37,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:37,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500700392] [2021-07-09 18:51:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:37,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:37,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500700392] [2021-07-09 18:51:37,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500700392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:37,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132258753] [2021-07-09 18:51:37,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:37,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:51:37,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:37,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:51:37,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:38,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132258753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:38,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:38,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-09 18:51:38,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659227729] [2021-07-09 18:51:38,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:51:38,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:38,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:51:38,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:51:38,094 INFO L87 Difference]: Start difference. First operand 169071 states and 779934 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:40,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:40,723 INFO L93 Difference]: Finished difference Result 190564 states and 868690 transitions. [2021-07-09 18:51:40,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:51:40,723 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:51:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:43,120 INFO L225 Difference]: With dead ends: 190564 [2021-07-09 18:51:43,121 INFO L226 Difference]: Without dead ends: 190336 [2021-07-09 18:51:43,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:51:43,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190336 states. [2021-07-09 18:51:49,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190336 to 169413. [2021-07-09 18:51:50,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169413 states, 169412 states have (on average 4.612908176516422) internal successors, (781482), 169412 states have internal predecessors, (781482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:51,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169413 states to 169413 states and 781482 transitions. [2021-07-09 18:51:51,722 INFO L78 Accepts]: Start accepts. Automaton has 169413 states and 781482 transitions. Word has length 25 [2021-07-09 18:51:51,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:51,722 INFO L482 AbstractCegarLoop]: Abstraction has 169413 states and 781482 transitions. [2021-07-09 18:51:51,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:51,722 INFO L276 IsEmpty]: Start isEmpty. Operand 169413 states and 781482 transitions. [2021-07-09 18:51:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:51:52,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:52,213 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] [2021-07-09 18:51:52,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 18:51:52,413 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:52,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:52,414 INFO L82 PathProgramCache]: Analyzing trace with hash -423308966, now seen corresponding path program 12 times [2021-07-09 18:51:52,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:52,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254625136] [2021-07-09 18:51:52,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:52,795 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 18:51:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:52,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:52,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254625136] [2021-07-09 18:51:52,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254625136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:52,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061660208] [2021-07-09 18:51:52,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:52,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:51:52,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:52,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:51:52,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:52,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061660208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:52,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:52,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:51:52,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660834375] [2021-07-09 18:51:52,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:51:52,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:52,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:51:52,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:51:52,919 INFO L87 Difference]: Start difference. First operand 169413 states and 781482 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:56,044 INFO L93 Difference]: Finished difference Result 262079 states and 1183330 transitions. [2021-07-09 18:51:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:51:56,044 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:51:56,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:58,147 INFO L225 Difference]: With dead ends: 262079 [2021-07-09 18:51:58,147 INFO L226 Difference]: Without dead ends: 262061 [2021-07-09 18:51:58,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 532.2ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:51:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262061 states. [2021-07-09 18:52:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262061 to 170992. [2021-07-09 18:52:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170992 states, 170991 states have (on average 4.612985478767889) internal successors, (788779), 170991 states have internal predecessors, (788779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170992 states to 170992 states and 788779 transitions. [2021-07-09 18:52:07,399 INFO L78 Accepts]: Start accepts. Automaton has 170992 states and 788779 transitions. Word has length 25 [2021-07-09 18:52:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:07,399 INFO L482 AbstractCegarLoop]: Abstraction has 170992 states and 788779 transitions. [2021-07-09 18:52:07,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 170992 states and 788779 transitions. [2021-07-09 18:52:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:52:08,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:08,214 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] [2021-07-09 18:52:08,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:08,429 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash -206280976, now seen corresponding path program 13 times [2021-07-09 18:52:08,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:08,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623871257] [2021-07-09 18:52:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:08,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:08,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623871257] [2021-07-09 18:52:08,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623871257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:08,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135825885] [2021-07-09 18:52:08,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:52:08,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:08,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135825885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:08,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:08,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:52:08,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106918465] [2021-07-09 18:52:08,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:52:08,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:08,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:52:08,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:52:08,573 INFO L87 Difference]: Start difference. First operand 170992 states and 788779 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:11,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:11,382 INFO L93 Difference]: Finished difference Result 223330 states and 1021133 transitions. [2021-07-09 18:52:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:52:11,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:52:11,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:14,099 INFO L225 Difference]: With dead ends: 223330 [2021-07-09 18:52:14,100 INFO L226 Difference]: Without dead ends: 223330 [2021-07-09 18:52:14,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:52:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223330 states. [2021-07-09 18:52:21,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223330 to 171112. [2021-07-09 18:52:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171112 states, 171111 states have (on average 4.612830268071603) internal successors, (789306), 171111 states have internal predecessors, (789306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171112 states to 171112 states and 789306 transitions. [2021-07-09 18:52:23,622 INFO L78 Accepts]: Start accepts. Automaton has 171112 states and 789306 transitions. Word has length 25 [2021-07-09 18:52:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:23,622 INFO L482 AbstractCegarLoop]: Abstraction has 171112 states and 789306 transitions. [2021-07-09 18:52:23,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 171112 states and 789306 transitions. [2021-07-09 18:52:24,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:52:24,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:24,105 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] [2021-07-09 18:52:24,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-09 18:52:24,306 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:24,306 INFO L82 PathProgramCache]: Analyzing trace with hash 64907726, now seen corresponding path program 14 times [2021-07-09 18:52:24,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:24,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77574588] [2021-07-09 18:52:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:24,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:24,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77574588] [2021-07-09 18:52:24,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77574588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:24,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540804490] [2021-07-09 18:52:24,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:24,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:52:24,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:24,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:52:24,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:24,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540804490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:24,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:24,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:52:24,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620185391] [2021-07-09 18:52:24,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:52:24,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:24,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:52:24,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:52:24,798 INFO L87 Difference]: Start difference. First operand 171112 states and 789306 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:27,928 INFO L93 Difference]: Finished difference Result 271293 states and 1227721 transitions. [2021-07-09 18:52:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:52:27,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:52:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:30,057 INFO L225 Difference]: With dead ends: 271293 [2021-07-09 18:52:30,057 INFO L226 Difference]: Without dead ends: 271293 [2021-07-09 18:52:30,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:52:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271293 states. [2021-07-09 18:52:38,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271293 to 180348. [2021-07-09 18:52:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180348 states, 180347 states have (on average 4.606841256023111) internal successors, (830830), 180347 states have internal predecessors, (830830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180348 states to 180348 states and 830830 transitions. [2021-07-09 18:52:40,451 INFO L78 Accepts]: Start accepts. Automaton has 180348 states and 830830 transitions. Word has length 25 [2021-07-09 18:52:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:40,451 INFO L482 AbstractCegarLoop]: Abstraction has 180348 states and 830830 transitions. [2021-07-09 18:52:40,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 180348 states and 830830 transitions. [2021-07-09 18:52:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:52:41,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:41,329 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] [2021-07-09 18:52:41,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:41,545 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:41,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:41,545 INFO L82 PathProgramCache]: Analyzing trace with hash 115677808, now seen corresponding path program 15 times [2021-07-09 18:52:41,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:41,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336006965] [2021-07-09 18:52:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:41,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:41,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336006965] [2021-07-09 18:52:41,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336006965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:41,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192767521] [2021-07-09 18:52:41,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:41,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:52:41,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:41,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:52:41,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:41,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192767521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:41,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:41,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:52:41,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934517183] [2021-07-09 18:52:41,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:52:41,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:41,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:52:41,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:52:41,703 INFO L87 Difference]: Start difference. First operand 180348 states and 830830 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:44,934 INFO L93 Difference]: Finished difference Result 228294 states and 1029691 transitions. [2021-07-09 18:52:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:52:44,934 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:52:44,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:47,616 INFO L225 Difference]: With dead ends: 228294 [2021-07-09 18:52:47,616 INFO L226 Difference]: Without dead ends: 228294 [2021-07-09 18:52:47,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:52:48,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228294 states. [2021-07-09 18:52:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228294 to 181280. [2021-07-09 18:52:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181280 states, 181279 states have (on average 4.603886826383641) internal successors, (834588), 181279 states have internal predecessors, (834588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181280 states to 181280 states and 834588 transitions. [2021-07-09 18:52:56,773 INFO L78 Accepts]: Start accepts. Automaton has 181280 states and 834588 transitions. Word has length 25 [2021-07-09 18:52:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:56,773 INFO L482 AbstractCegarLoop]: Abstraction has 181280 states and 834588 transitions. [2021-07-09 18:52:56,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 181280 states and 834588 transitions. [2021-07-09 18:52:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:52:57,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:57,678 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] [2021-07-09 18:52:57,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 18:52:57,900 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:57,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:57,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1557868062, now seen corresponding path program 16 times [2021-07-09 18:52:57,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:57,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580913023] [2021-07-09 18:52:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:57,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:57,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580913023] [2021-07-09 18:52:57,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580913023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:57,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194595024] [2021-07-09 18:52:57,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:58,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:52:58,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:52:58,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:58,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194595024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:58,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:58,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:52:58,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605583284] [2021-07-09 18:52:58,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:52:58,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:58,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:52:58,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:52:58,108 INFO L87 Difference]: Start difference. First operand 181280 states and 834588 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:00,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:00,851 INFO L93 Difference]: Finished difference Result 206101 states and 938235 transitions. [2021-07-09 18:53:00,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:53:00,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:53:00,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:02,124 INFO L225 Difference]: With dead ends: 206101 [2021-07-09 18:53:02,125 INFO L226 Difference]: Without dead ends: 205937 [2021-07-09 18:53:02,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:53:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205937 states. [2021-07-09 18:53:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205937 to 181308. [2021-07-09 18:53:09,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181308 states, 181307 states have (on average 4.603799081116559) internal successors, (834701), 181307 states have internal predecessors, (834701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181308 states to 181308 states and 834701 transitions. [2021-07-09 18:53:11,068 INFO L78 Accepts]: Start accepts. Automaton has 181308 states and 834701 transitions. Word has length 25 [2021-07-09 18:53:11,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:11,068 INFO L482 AbstractCegarLoop]: Abstraction has 181308 states and 834701 transitions. [2021-07-09 18:53:11,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:11,068 INFO L276 IsEmpty]: Start isEmpty. Operand 181308 states and 834701 transitions. [2021-07-09 18:53:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:53:11,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:11,934 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] [2021-07-09 18:53:12,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 18:53:12,135 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:12,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1245125948, now seen corresponding path program 17 times [2021-07-09 18:53:12,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:12,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666146897] [2021-07-09 18:53:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:12,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:12,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666146897] [2021-07-09 18:53:12,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666146897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:12,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802463812] [2021-07-09 18:53:12,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:12,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:53:12,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:12,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:53:12,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:12,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802463812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:12,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:12,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:53:12,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539069353] [2021-07-09 18:53:12,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:53:12,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:12,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:53:12,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:53:12,265 INFO L87 Difference]: Start difference. First operand 181308 states and 834701 transitions. Second operand has 10 states, 10 states have (on average 3.6) 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) [2021-07-09 18:53:14,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:14,891 INFO L93 Difference]: Finished difference Result 182017 states and 837141 transitions. [2021-07-09 18:53:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:53:14,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) 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 25 [2021-07-09 18:53:14,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:16,678 INFO L225 Difference]: With dead ends: 182017 [2021-07-09 18:53:16,678 INFO L226 Difference]: Without dead ends: 181917 [2021-07-09 18:53:16,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:53:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181917 states. [2021-07-09 18:53:22,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181917 to 181308. [2021-07-09 18:53:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181308 states, 181307 states have (on average 4.603650162431677) internal successors, (834674), 181307 states have internal predecessors, (834674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181308 states to 181308 states and 834674 transitions. [2021-07-09 18:53:24,770 INFO L78 Accepts]: Start accepts. Automaton has 181308 states and 834674 transitions. Word has length 25 [2021-07-09 18:53:24,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:24,770 INFO L482 AbstractCegarLoop]: Abstraction has 181308 states and 834674 transitions. [2021-07-09 18:53:24,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) 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) [2021-07-09 18:53:24,770 INFO L276 IsEmpty]: Start isEmpty. Operand 181308 states and 834674 transitions. [2021-07-09 18:53:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:53:25,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:25,660 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:53:25,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 18:53:25,861 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:25,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1690564398, now seen corresponding path program 7 times [2021-07-09 18:53:25,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:25,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816445636] [2021-07-09 18:53:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:53:25,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:25,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816445636] [2021-07-09 18:53:25,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816445636] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:53:25,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:53:25,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:53:25,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737330205] [2021-07-09 18:53:25,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:53:25,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:25,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:53:25,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:53:25,881 INFO L87 Difference]: Start difference. First operand 181308 states and 834674 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) [2021-07-09 18:53:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:27,976 INFO L93 Difference]: Finished difference Result 198214 states and 888498 transitions. [2021-07-09 18:53:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:53:27,977 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 [2021-07-09 18:53:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:29,335 INFO L225 Difference]: With dead ends: 198214 [2021-07-09 18:53:29,335 INFO L226 Difference]: Without dead ends: 164346 [2021-07-09 18:53:29,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:53:29,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164346 states. [2021-07-09 18:53:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164346 to 125085. [2021-07-09 18:53:34,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125085 states, 125084 states have (on average 4.721331265389658) internal successors, (590563), 125084 states have internal predecessors, (590563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125085 states to 125085 states and 590563 transitions. [2021-07-09 18:53:35,315 INFO L78 Accepts]: Start accepts. Automaton has 125085 states and 590563 transitions. Word has length 25 [2021-07-09 18:53:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:35,315 INFO L482 AbstractCegarLoop]: Abstraction has 125085 states and 590563 transitions. [2021-07-09 18:53:35,315 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) [2021-07-09 18:53:35,315 INFO L276 IsEmpty]: Start isEmpty. Operand 125085 states and 590563 transitions. [2021-07-09 18:53:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:53:35,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:35,702 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:53:35,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-07-09 18:53:35,702 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:35,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:35,703 INFO L82 PathProgramCache]: Analyzing trace with hash 103022096, now seen corresponding path program 8 times [2021-07-09 18:53:35,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:35,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986149858] [2021-07-09 18:53:35,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:53:35,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:35,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986149858] [2021-07-09 18:53:35,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986149858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:35,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317441396] [2021-07-09 18:53:35,733 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 [2021-07-09 18:53:35,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:53:35,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:35,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:53:35,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:53:35,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317441396] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:53:35,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:53:35,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-07-09 18:53:35,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531894445] [2021-07-09 18:53:35,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:53:35,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:35,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:53:35,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:53:35,807 INFO L87 Difference]: Start difference. First operand 125085 states and 590563 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) 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) [2021-07-09 18:53:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:37,386 INFO L93 Difference]: Finished difference Result 130126 states and 607352 transitions. [2021-07-09 18:53:37,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:53:37,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) 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 [2021-07-09 18:53:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:38,479 INFO L225 Difference]: With dead ends: 130126 [2021-07-09 18:53:38,479 INFO L226 Difference]: Without dead ends: 127575 [2021-07-09 18:53:38,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:53:38,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127575 states. [2021-07-09 18:53:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127575 to 87700. [2021-07-09 18:53:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87700 states, 87699 states have (on average 4.690794649881982) internal successors, (411378), 87699 states have internal predecessors, (411378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87700 states to 87700 states and 411378 transitions. [2021-07-09 18:53:42,317 INFO L78 Accepts]: Start accepts. Automaton has 87700 states and 411378 transitions. Word has length 25 [2021-07-09 18:53:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:42,318 INFO L482 AbstractCegarLoop]: Abstraction has 87700 states and 411378 transitions. [2021-07-09 18:53:42,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) 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) [2021-07-09 18:53:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 87700 states and 411378 transitions. [2021-07-09 18:53:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:53:42,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:42,643 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:53:42,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-07-09 18:53:42,867 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:42,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1193216718, now seen corresponding path program 9 times [2021-07-09 18:53:42,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:42,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983834644] [2021-07-09 18:53:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:53:42,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:42,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983834644] [2021-07-09 18:53:42,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983834644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:42,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288880865] [2021-07-09 18:53:42,952 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 [2021-07-09 18:53:43,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:53:43,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:43,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:53:43,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:53:43,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288880865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:43,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:43,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:53:43,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711086862] [2021-07-09 18:53:43,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:53:43,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:43,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:53:43,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:53:43,094 INFO L87 Difference]: Start difference. First operand 87700 states and 411378 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:53:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:44,561 INFO L93 Difference]: Finished difference Result 89555 states and 418507 transitions. [2021-07-09 18:53:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:53:44,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:53:44,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:45,318 INFO L225 Difference]: With dead ends: 89555 [2021-07-09 18:53:45,319 INFO L226 Difference]: Without dead ends: 89419 [2021-07-09 18:53:45,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:53:45,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89419 states. [2021-07-09 18:53:47,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89419 to 87693. [2021-07-09 18:53:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87693 states, 87692 states have (on average 4.691762076358162) internal successors, (411430), 87692 states have internal predecessors, (411430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87693 states to 87693 states and 411430 transitions. [2021-07-09 18:53:48,655 INFO L78 Accepts]: Start accepts. Automaton has 87693 states and 411430 transitions. Word has length 25 [2021-07-09 18:53:48,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:48,655 INFO L482 AbstractCegarLoop]: Abstraction has 87693 states and 411430 transitions. [2021-07-09 18:53:48,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:53:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 87693 states and 411430 transitions. [2021-07-09 18:53:48,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:53:48,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:48,887 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:53:49,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:49,087 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:49,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:49,087 INFO L82 PathProgramCache]: Analyzing trace with hash -648382774, now seen corresponding path program 10 times [2021-07-09 18:53:49,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:49,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198095779] [2021-07-09 18:53:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:53:49,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:49,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198095779] [2021-07-09 18:53:49,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198095779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:49,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363533566] [2021-07-09 18:53:49,149 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 [2021-07-09 18:53:49,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:53:49,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:49,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:53:49,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:53:49,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363533566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:49,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:49,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:53:49,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899487221] [2021-07-09 18:53:49,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:53:49,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:49,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:53:49,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:53:49,237 INFO L87 Difference]: Start difference. First operand 87693 states and 411430 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:53:50,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:50,236 INFO L93 Difference]: Finished difference Result 89703 states and 419257 transitions. [2021-07-09 18:53:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:53:50,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:53:50,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:51,001 INFO L225 Difference]: With dead ends: 89703 [2021-07-09 18:53:51,001 INFO L226 Difference]: Without dead ends: 89567 [2021-07-09 18:53:51,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:53:51,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89567 states. [2021-07-09 18:53:53,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89567 to 87714. [2021-07-09 18:53:53,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87714 states, 87713 states have (on average 4.692006886094422) internal successors, (411550), 87713 states have internal predecessors, (411550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87714 states to 87714 states and 411550 transitions. [2021-07-09 18:53:54,243 INFO L78 Accepts]: Start accepts. Automaton has 87714 states and 411550 transitions. Word has length 25 [2021-07-09 18:53:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:54,244 INFO L482 AbstractCegarLoop]: Abstraction has 87714 states and 411550 transitions. [2021-07-09 18:53:54,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:53:54,244 INFO L276 IsEmpty]: Start isEmpty. Operand 87714 states and 411550 transitions. [2021-07-09 18:53:54,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:53:54,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:54,498 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:53:54,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:54,701 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash -961842550, now seen corresponding path program 11 times [2021-07-09 18:53:54,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:54,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994501164] [2021-07-09 18:53:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:53:54,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:54,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994501164] [2021-07-09 18:53:54,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994501164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:54,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281771748] [2021-07-09 18:53:54,774 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 [2021-07-09 18:53:54,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:53:54,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:54,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:53:54,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:53:54,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281771748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:54,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:54,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:53:54,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340246529] [2021-07-09 18:53:54,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:53:54,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:54,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:53:54,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:53:54,852 INFO L87 Difference]: Start difference. First operand 87714 states and 411550 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:53:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:55,821 INFO L93 Difference]: Finished difference Result 89056 states and 416830 transitions. [2021-07-09 18:53:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:53:55,822 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:53:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:56,550 INFO L225 Difference]: With dead ends: 89056 [2021-07-09 18:53:56,550 INFO L226 Difference]: Without dead ends: 88940 [2021-07-09 18:53:56,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:53:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88940 states. [2021-07-09 18:53:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88940 to 87736. [2021-07-09 18:53:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87736 states, 87735 states have (on average 4.692141106741893) internal successors, (411665), 87735 states have internal predecessors, (411665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87736 states to 87736 states and 411665 transitions. [2021-07-09 18:53:59,312 INFO L78 Accepts]: Start accepts. Automaton has 87736 states and 411665 transitions. Word has length 25 [2021-07-09 18:53:59,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:59,312 INFO L482 AbstractCegarLoop]: Abstraction has 87736 states and 411665 transitions. [2021-07-09 18:53:59,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:53:59,312 INFO L276 IsEmpty]: Start isEmpty. Operand 87736 states and 411665 transitions. [2021-07-09 18:53:59,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:53:59,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:59,964 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:54:00,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-09 18:54:00,164 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:00,165 INFO L82 PathProgramCache]: Analyzing trace with hash 394898822, now seen corresponding path program 12 times [2021-07-09 18:54:00,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:00,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426662445] [2021-07-09 18:54:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:00,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:00,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426662445] [2021-07-09 18:54:00,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426662445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:00,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491369107] [2021-07-09 18:54:00,241 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 [2021-07-09 18:54:00,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:54:00,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:00,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:54:00,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:00,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491369107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:00,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:00,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:54:00,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122455287] [2021-07-09 18:54:00,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:54:00,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:00,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:54:00,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:00,319 INFO L87 Difference]: Start difference. First operand 87736 states and 411665 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:01,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:01,316 INFO L93 Difference]: Finished difference Result 88944 states and 416367 transitions. [2021-07-09 18:54:01,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:54:01,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:54:01,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:02,080 INFO L225 Difference]: With dead ends: 88944 [2021-07-09 18:54:02,081 INFO L226 Difference]: Without dead ends: 88848 [2021-07-09 18:54:02,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88848 states. [2021-07-09 18:54:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88848 to 87758. [2021-07-09 18:54:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87758 states, 87757 states have (on average 4.692412001321832) internal successors, (411792), 87757 states have internal predecessors, (411792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87758 states to 87758 states and 411792 transitions. [2021-07-09 18:54:04,834 INFO L78 Accepts]: Start accepts. Automaton has 87758 states and 411792 transitions. Word has length 25 [2021-07-09 18:54:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:04,834 INFO L482 AbstractCegarLoop]: Abstraction has 87758 states and 411792 transitions. [2021-07-09 18:54:04,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:04,834 INFO L276 IsEmpty]: Start isEmpty. Operand 87758 states and 411792 transitions. [2021-07-09 18:54:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:54:05,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:05,583 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:54:05,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 18:54:05,807 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:05,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:05,807 INFO L82 PathProgramCache]: Analyzing trace with hash 267220118, now seen corresponding path program 13 times [2021-07-09 18:54:05,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:05,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199309783] [2021-07-09 18:54:05,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:05,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:05,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199309783] [2021-07-09 18:54:05,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199309783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:05,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674864960] [2021-07-09 18:54:05,906 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 [2021-07-09 18:54:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:05,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:54:05,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:05,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674864960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:05,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:05,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:54:05,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238630674] [2021-07-09 18:54:05,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:54:05,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:05,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:54:05,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:05,987 INFO L87 Difference]: Start difference. First operand 87758 states and 411792 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:07,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:07,167 INFO L93 Difference]: Finished difference Result 90259 states and 421196 transitions. [2021-07-09 18:54:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:54:07,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:54:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:07,727 INFO L225 Difference]: With dead ends: 90259 [2021-07-09 18:54:07,727 INFO L226 Difference]: Without dead ends: 90123 [2021-07-09 18:54:07,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:07,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90123 states. [2021-07-09 18:54:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90123 to 87809. [2021-07-09 18:54:10,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87809 states, 87808 states have (on average 4.692852587463557) internal successors, (412070), 87808 states have internal predecessors, (412070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87809 states to 87809 states and 412070 transitions. [2021-07-09 18:54:10,887 INFO L78 Accepts]: Start accepts. Automaton has 87809 states and 412070 transitions. Word has length 25 [2021-07-09 18:54:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:10,887 INFO L482 AbstractCegarLoop]: Abstraction has 87809 states and 412070 transitions. [2021-07-09 18:54:10,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 87809 states and 412070 transitions. [2021-07-09 18:54:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:54:11,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:11,108 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:54:11,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 18:54:11,309 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:11,309 INFO L82 PathProgramCache]: Analyzing trace with hash -46239658, now seen corresponding path program 14 times [2021-07-09 18:54:11,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:11,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760573297] [2021-07-09 18:54:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:11,743 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-07-09 18:54:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:11,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:11,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760573297] [2021-07-09 18:54:11,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760573297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:11,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888413818] [2021-07-09 18:54:11,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:11,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:54:11,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:11,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:54:11,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:11,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888413818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:11,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:11,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:54:11,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838168360] [2021-07-09 18:54:11,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:54:11,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:11,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:54:11,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:11,825 INFO L87 Difference]: Start difference. First operand 87809 states and 412070 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:12,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:12,751 INFO L93 Difference]: Finished difference Result 89754 states and 419470 transitions. [2021-07-09 18:54:12,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:54:12,752 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:54:12,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:13,257 INFO L225 Difference]: With dead ends: 89754 [2021-07-09 18:54:13,257 INFO L226 Difference]: Without dead ends: 89638 [2021-07-09 18:54:13,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 435.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89638 states. [2021-07-09 18:54:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89638 to 87839. [2021-07-09 18:54:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87839 states, 87838 states have (on average 4.693196566406339) internal successors, (412241), 87838 states have internal predecessors, (412241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87839 states to 87839 states and 412241 transitions. [2021-07-09 18:54:16,304 INFO L78 Accepts]: Start accepts. Automaton has 87839 states and 412241 transitions. Word has length 25 [2021-07-09 18:54:16,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:16,304 INFO L482 AbstractCegarLoop]: Abstraction has 87839 states and 412241 transitions. [2021-07-09 18:54:16,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:16,304 INFO L276 IsEmpty]: Start isEmpty. Operand 87839 states and 412241 transitions. [2021-07-09 18:54:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:54:16,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:16,529 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:54:16,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 18:54:16,730 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:16,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:16,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1310501714, now seen corresponding path program 15 times [2021-07-09 18:54:16,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:16,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871055555] [2021-07-09 18:54:16,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:16,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:16,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871055555] [2021-07-09 18:54:16,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871055555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:16,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154790446] [2021-07-09 18:54:16,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:16,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:54:16,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:16,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:54:16,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:16,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154790446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:16,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:16,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:54:16,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578671969] [2021-07-09 18:54:16,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:54:16,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:16,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:54:16,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:16,919 INFO L87 Difference]: Start difference. First operand 87839 states and 412241 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:18,187 INFO L93 Difference]: Finished difference Result 89966 states and 420506 transitions. [2021-07-09 18:54:18,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:54:18,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:54:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:18,666 INFO L225 Difference]: With dead ends: 89966 [2021-07-09 18:54:18,666 INFO L226 Difference]: Without dead ends: 89870 [2021-07-09 18:54:18,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89870 states. [2021-07-09 18:54:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89870 to 87873. [2021-07-09 18:54:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87873 states, 87872 states have (on average 4.6936453022578295) internal successors, (412440), 87872 states have internal predecessors, (412440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87873 states to 87873 states and 412440 transitions. [2021-07-09 18:54:21,585 INFO L78 Accepts]: Start accepts. Automaton has 87873 states and 412440 transitions. Word has length 25 [2021-07-09 18:54:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:21,585 INFO L482 AbstractCegarLoop]: Abstraction has 87873 states and 412440 transitions. [2021-07-09 18:54:21,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 87873 states and 412440 transitions. [2021-07-09 18:54:21,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:54:21,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:21,817 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:54:22,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-09 18:54:22,018 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:22,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:22,018 INFO L82 PathProgramCache]: Analyzing trace with hash 523034708, now seen corresponding path program 9 times [2021-07-09 18:54:22,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:22,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609414410] [2021-07-09 18:54:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:22,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:22,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609414410] [2021-07-09 18:54:22,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609414410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:22,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270331043] [2021-07-09 18:54:22,040 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:22,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:54:22,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:22,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:54:22,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:22,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270331043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:22,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:22,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 18:54:22,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993659267] [2021-07-09 18:54:22,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:54:22,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:22,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:54:22,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:54:22,127 INFO L87 Difference]: Start difference. First operand 87873 states and 412440 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:23,550 INFO L93 Difference]: Finished difference Result 97671 states and 457254 transitions. [2021-07-09 18:54:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:54:23,551 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 [2021-07-09 18:54:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:24,086 INFO L225 Difference]: With dead ends: 97671 [2021-07-09 18:54:24,086 INFO L226 Difference]: Without dead ends: 97564 [2021-07-09 18:54:24,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:54:24,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97564 states. [2021-07-09 18:54:26,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97564 to 96045. [2021-07-09 18:54:26,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96045 states, 96044 states have (on average 4.702969472325185) internal successors, (451692), 96044 states have internal predecessors, (451692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:27,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96045 states to 96045 states and 451692 transitions. [2021-07-09 18:54:27,364 INFO L78 Accepts]: Start accepts. Automaton has 96045 states and 451692 transitions. Word has length 25 [2021-07-09 18:54:27,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:27,364 INFO L482 AbstractCegarLoop]: Abstraction has 96045 states and 451692 transitions. [2021-07-09 18:54:27,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:27,364 INFO L276 IsEmpty]: Start isEmpty. Operand 96045 states and 451692 transitions. [2021-07-09 18:54:28,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:54:28,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:28,072 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:54:28,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:28,273 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:28,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:28,273 INFO L82 PathProgramCache]: Analyzing trace with hash -857833266, now seen corresponding path program 16 times [2021-07-09 18:54:28,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:28,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567257972] [2021-07-09 18:54:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:28,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:28,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567257972] [2021-07-09 18:54:28,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567257972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:28,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480401579] [2021-07-09 18:54:28,356 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:28,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:54:28,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:28,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:54:28,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:28,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480401579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:28,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:28,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:54:28,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129262551] [2021-07-09 18:54:28,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:54:28,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:28,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:54:28,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:28,434 INFO L87 Difference]: Start difference. First operand 96045 states and 451692 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:29,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:29,484 INFO L93 Difference]: Finished difference Result 97830 states and 458461 transitions. [2021-07-09 18:54:29,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:54:29,485 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:54:29,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:30,662 INFO L225 Difference]: With dead ends: 97830 [2021-07-09 18:54:30,663 INFO L226 Difference]: Without dead ends: 97714 [2021-07-09 18:54:30,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97714 states. [2021-07-09 18:54:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97714 to 96069. [2021-07-09 18:54:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96069 states, 96068 states have (on average 4.703106133155681) internal successors, (451818), 96068 states have internal predecessors, (451818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96069 states to 96069 states and 451818 transitions. [2021-07-09 18:54:34,536 INFO L78 Accepts]: Start accepts. Automaton has 96069 states and 451818 transitions. Word has length 25 [2021-07-09 18:54:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:34,536 INFO L482 AbstractCegarLoop]: Abstraction has 96069 states and 451818 transitions. [2021-07-09 18:54:34,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 96069 states and 451818 transitions. [2021-07-09 18:54:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:54:34,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:34,794 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:54:34,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 18:54:34,994 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:34,995 INFO L82 PathProgramCache]: Analyzing trace with hash 498908106, now seen corresponding path program 17 times [2021-07-09 18:54:34,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:34,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036352634] [2021-07-09 18:54:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:35,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036352634] [2021-07-09 18:54:35,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036352634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423566258] [2021-07-09 18:54:35,074 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:35,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:54:35,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:35,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:54:35,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:35,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423566258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:35,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:35,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:54:35,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802697348] [2021-07-09 18:54:35,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:54:35,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:35,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:54:35,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:35,151 INFO L87 Difference]: Start difference. First operand 96069 states and 451818 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:36,434 INFO L93 Difference]: Finished difference Result 98062 states and 459589 transitions. [2021-07-09 18:54:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:54:36,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:54:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:36,958 INFO L225 Difference]: With dead ends: 98062 [2021-07-09 18:54:36,958 INFO L226 Difference]: Without dead ends: 97966 [2021-07-09 18:54:36,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97966 states. [2021-07-09 18:54:39,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97966 to 96093. [2021-07-09 18:54:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96093 states, 96092 states have (on average 4.7034716729800605) internal successors, (451966), 96092 states have internal predecessors, (451966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:40,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96093 states to 96093 states and 451966 transitions. [2021-07-09 18:54:40,339 INFO L78 Accepts]: Start accepts. Automaton has 96093 states and 451966 transitions. Word has length 25 [2021-07-09 18:54:40,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:40,339 INFO L482 AbstractCegarLoop]: Abstraction has 96093 states and 451966 transitions. [2021-07-09 18:54:40,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 96093 states and 451966 transitions. [2021-07-09 18:54:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:54:40,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:40,585 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:54:40,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:40,997 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:40,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1202930538, now seen corresponding path program 18 times [2021-07-09 18:54:40,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:40,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209422699] [2021-07-09 18:54:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:41,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:41,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209422699] [2021-07-09 18:54:41,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209422699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:41,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414873094] [2021-07-09 18:54:41,062 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:41,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:54:41,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:41,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:54:41,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:54:41,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414873094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:41,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:41,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:54:41,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36268252] [2021-07-09 18:54:41,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:54:41,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:41,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:54:41,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:41,146 INFO L87 Difference]: Start difference. First operand 96093 states and 451966 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:42,097 INFO L93 Difference]: Finished difference Result 98621 states and 461688 transitions. [2021-07-09 18:54:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:54:42,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:54:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:42,621 INFO L225 Difference]: With dead ends: 98621 [2021-07-09 18:54:42,621 INFO L226 Difference]: Without dead ends: 98525 [2021-07-09 18:54:42,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:54:43,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98525 states. [2021-07-09 18:54:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98525 to 96141. [2021-07-09 18:54:45,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96141 states, 96140 states have (on average 4.70395256916996) internal successors, (452238), 96140 states have internal predecessors, (452238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96141 states to 96141 states and 452238 transitions. [2021-07-09 18:54:46,089 INFO L78 Accepts]: Start accepts. Automaton has 96141 states and 452238 transitions. Word has length 25 [2021-07-09 18:54:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:46,089 INFO L482 AbstractCegarLoop]: Abstraction has 96141 states and 452238 transitions. [2021-07-09 18:54:46,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:54:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 96141 states and 452238 transitions. [2021-07-09 18:54:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:54:46,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:46,344 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:54:46,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:46,544 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:46,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:46,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1894658838, now seen corresponding path program 10 times [2021-07-09 18:54:46,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:46,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142505425] [2021-07-09 18:54:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:46,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:46,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142505425] [2021-07-09 18:54:46,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142505425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:46,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127746959] [2021-07-09 18:54:46,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:46,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:54:46,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:46,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:54:46,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:46,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127746959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:46,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:46,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 18:54:46,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870410216] [2021-07-09 18:54:46,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:54:46,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:46,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:54:46,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:54:46,638 INFO L87 Difference]: Start difference. First operand 96141 states and 452238 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:48,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:48,236 INFO L93 Difference]: Finished difference Result 107267 states and 496764 transitions. [2021-07-09 18:54:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:54:48,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 [2021-07-09 18:54:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:48,821 INFO L225 Difference]: With dead ends: 107267 [2021-07-09 18:54:48,822 INFO L226 Difference]: Without dead ends: 107165 [2021-07-09 18:54:48,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:54:49,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107165 states. [2021-07-09 18:54:51,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107165 to 96163. [2021-07-09 18:54:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96163 states, 96162 states have (on average 4.703042781972089) internal successors, (452254), 96162 states have internal predecessors, (452254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96163 states to 96163 states and 452254 transitions. [2021-07-09 18:54:52,471 INFO L78 Accepts]: Start accepts. Automaton has 96163 states and 452254 transitions. Word has length 25 [2021-07-09 18:54:52,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:52,471 INFO L482 AbstractCegarLoop]: Abstraction has 96163 states and 452254 transitions. [2021-07-09 18:54:52,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:52,471 INFO L276 IsEmpty]: Start isEmpty. Operand 96163 states and 452254 transitions. [2021-07-09 18:54:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:54:52,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:52,734 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:54:52,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:52,935 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:52,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:52,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1370737230, now seen corresponding path program 11 times [2021-07-09 18:54:52,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:52,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753748470] [2021-07-09 18:54:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:52,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:52,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753748470] [2021-07-09 18:54:52,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753748470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:52,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993178719] [2021-07-09 18:54:52,966 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:52,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:54:52,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:52,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:54:52,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:53,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993178719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:53,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:53,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:54:53,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140245650] [2021-07-09 18:54:53,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:54:53,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:53,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:54:53,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:54:53,055 INFO L87 Difference]: Start difference. First operand 96163 states and 452254 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:54,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:54,432 INFO L93 Difference]: Finished difference Result 105665 states and 492345 transitions. [2021-07-09 18:54:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:54:54,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) 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 25 [2021-07-09 18:54:54,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:55,014 INFO L225 Difference]: With dead ends: 105665 [2021-07-09 18:54:55,014 INFO L226 Difference]: Without dead ends: 105515 [2021-07-09 18:54:55,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:54:55,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105515 states. [2021-07-09 18:54:57,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105515 to 100600. [2021-07-09 18:54:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100600 states, 100599 states have (on average 4.695384645970636) internal successors, (472351), 100599 states have internal predecessors, (472351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:59,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100600 states to 100600 states and 472351 transitions. [2021-07-09 18:54:59,524 INFO L78 Accepts]: Start accepts. Automaton has 100600 states and 472351 transitions. Word has length 25 [2021-07-09 18:54:59,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:59,524 INFO L482 AbstractCegarLoop]: Abstraction has 100600 states and 472351 transitions. [2021-07-09 18:54:59,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 100600 states and 472351 transitions. [2021-07-09 18:54:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:54:59,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:59,890 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:55:00,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:00,112 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1313736820, now seen corresponding path program 12 times [2021-07-09 18:55:00,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:00,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381661476] [2021-07-09 18:55:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:00,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:00,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381661476] [2021-07-09 18:55:00,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381661476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:00,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638652024] [2021-07-09 18:55:00,136 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:00,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:55:00,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:55:00,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:55:00,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:00,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638652024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:00,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:00,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:55:00,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574148522] [2021-07-09 18:55:00,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:55:00,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:00,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:55:00,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:55:00,231 INFO L87 Difference]: Start difference. First operand 100600 states and 472351 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:01,381 INFO L93 Difference]: Finished difference Result 103952 states and 485481 transitions. [2021-07-09 18:55:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:55:01,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:55:01,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:02,240 INFO L225 Difference]: With dead ends: 103952 [2021-07-09 18:55:02,240 INFO L226 Difference]: Without dead ends: 103908 [2021-07-09 18:55:02,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:55:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103908 states. [2021-07-09 18:55:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103908 to 100692. [2021-07-09 18:55:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100692 states, 100691 states have (on average 4.694391752986861) internal successors, (472683), 100691 states have internal predecessors, (472683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100692 states to 100692 states and 472683 transitions. [2021-07-09 18:55:05,782 INFO L78 Accepts]: Start accepts. Automaton has 100692 states and 472683 transitions. Word has length 25 [2021-07-09 18:55:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:05,782 INFO L482 AbstractCegarLoop]: Abstraction has 100692 states and 472683 transitions. [2021-07-09 18:55:05,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 100692 states and 472683 transitions. [2021-07-09 18:55:06,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:55:06,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:06,465 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:55:06,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:06,669 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:06,669 INFO L82 PathProgramCache]: Analyzing trace with hash 812194570, now seen corresponding path program 13 times [2021-07-09 18:55:06,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:06,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067665723] [2021-07-09 18:55:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:06,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:06,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067665723] [2021-07-09 18:55:06,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067665723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:06,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893494146] [2021-07-09 18:55:06,695 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:06,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:55:06,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:06,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893494146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:06,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:06,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:55:06,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542395787] [2021-07-09 18:55:06,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:55:06,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:06,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:55:06,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:55:06,797 INFO L87 Difference]: Start difference. First operand 100692 states and 472683 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) [2021-07-09 18:55:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:08,426 INFO L93 Difference]: Finished difference Result 122378 states and 564861 transitions. [2021-07-09 18:55:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:55:08,426 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 25 [2021-07-09 18:55:08,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:09,108 INFO L225 Difference]: With dead ends: 122378 [2021-07-09 18:55:09,108 INFO L226 Difference]: Without dead ends: 120769 [2021-07-09 18:55:09,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:55:09,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120769 states. [2021-07-09 18:55:12,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120769 to 103273. [2021-07-09 18:55:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103273 states, 103272 states have (on average 4.6974688202029595) internal successors, (485117), 103272 states have internal predecessors, (485117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103273 states to 103273 states and 485117 transitions. [2021-07-09 18:55:13,228 INFO L78 Accepts]: Start accepts. Automaton has 103273 states and 485117 transitions. Word has length 25 [2021-07-09 18:55:13,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:13,228 INFO L482 AbstractCegarLoop]: Abstraction has 103273 states and 485117 transitions. [2021-07-09 18:55:13,228 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) [2021-07-09 18:55:13,228 INFO L276 IsEmpty]: Start isEmpty. Operand 103273 states and 485117 transitions. [2021-07-09 18:55:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:55:13,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:13,504 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:55:13,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 18:55:13,705 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:13,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:13,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1682717532, now seen corresponding path program 14 times [2021-07-09 18:55:13,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:13,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231407531] [2021-07-09 18:55:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:13,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:13,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231407531] [2021-07-09 18:55:13,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231407531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:13,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371746972] [2021-07-09 18:55:13,752 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:13,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:55:13,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:55:13,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:55:13,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:13,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371746972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:13,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:13,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:55:13,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72270944] [2021-07-09 18:55:13,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:55:13,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:13,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:55:13,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:55:13,845 INFO L87 Difference]: Start difference. First operand 103273 states and 485117 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:14,248 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-09 18:55:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:15,305 INFO L93 Difference]: Finished difference Result 106739 states and 498675 transitions. [2021-07-09 18:55:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:55:15,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 [2021-07-09 18:55:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:15,892 INFO L225 Difference]: With dead ends: 106739 [2021-07-09 18:55:15,893 INFO L226 Difference]: Without dead ends: 106655 [2021-07-09 18:55:15,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 393.0ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:55:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106655 states. [2021-07-09 18:55:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106655 to 103317. [2021-07-09 18:55:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103317 states, 103316 states have (on average 4.696697510550157) internal successors, (485244), 103316 states have internal predecessors, (485244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:19,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103317 states to 103317 states and 485244 transitions. [2021-07-09 18:55:19,797 INFO L78 Accepts]: Start accepts. Automaton has 103317 states and 485244 transitions. Word has length 25 [2021-07-09 18:55:19,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:19,797 INFO L482 AbstractCegarLoop]: Abstraction has 103317 states and 485244 transitions. [2021-07-09 18:55:19,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:19,797 INFO L276 IsEmpty]: Start isEmpty. Operand 103317 states and 485244 transitions. [2021-07-09 18:55:20,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:55:20,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:20,066 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:55:20,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 18:55:20,267 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:20,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:20,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1176441750, now seen corresponding path program 7 times [2021-07-09 18:55:20,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:20,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917507632] [2021-07-09 18:55:20,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:20,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:20,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917507632] [2021-07-09 18:55:20,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917507632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:20,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457503119] [2021-07-09 18:55:20,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:20,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:55:20,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:20,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457503119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:20,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:20,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:55:20,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944657196] [2021-07-09 18:55:20,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:55:20,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:20,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:55:20,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:55:20,766 INFO L87 Difference]: Start difference. First operand 103317 states and 485244 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:55:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:22,105 INFO L93 Difference]: Finished difference Result 105638 states and 494245 transitions. [2021-07-09 18:55:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:55:22,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:55:22,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:23,141 INFO L225 Difference]: With dead ends: 105638 [2021-07-09 18:55:23,141 INFO L226 Difference]: Without dead ends: 105538 [2021-07-09 18:55:23,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:55:23,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105538 states. [2021-07-09 18:55:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105538 to 103392. [2021-07-09 18:55:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103392 states, 103391 states have (on average 4.696830478474916) internal successors, (485610), 103391 states have internal predecessors, (485610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103392 states to 103392 states and 485610 transitions. [2021-07-09 18:55:27,289 INFO L78 Accepts]: Start accepts. Automaton has 103392 states and 485610 transitions. Word has length 25 [2021-07-09 18:55:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:27,289 INFO L482 AbstractCegarLoop]: Abstraction has 103392 states and 485610 transitions. [2021-07-09 18:55:27,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:55:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 103392 states and 485610 transitions. [2021-07-09 18:55:27,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:55:27,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:27,615 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:55:27,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-09 18:55:27,815 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:27,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1470680270, now seen corresponding path program 8 times [2021-07-09 18:55:27,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:27,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237647480] [2021-07-09 18:55:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:27,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:27,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237647480] [2021-07-09 18:55:27,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237647480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:27,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699951964] [2021-07-09 18:55:27,866 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 [2021-07-09 18:55:27,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:55:27,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:55:27,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:55:27,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:27,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699951964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:27,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:27,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:55:27,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264025619] [2021-07-09 18:55:27,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:55:27,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:27,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:55:27,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:55:27,939 INFO L87 Difference]: Start difference. First operand 103392 states and 485610 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:55:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:29,345 INFO L93 Difference]: Finished difference Result 105993 states and 495944 transitions. [2021-07-09 18:55:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:55:29,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:55:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:29,934 INFO L225 Difference]: With dead ends: 105993 [2021-07-09 18:55:29,934 INFO L226 Difference]: Without dead ends: 105893 [2021-07-09 18:55:29,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:55:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105893 states. [2021-07-09 18:55:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105893 to 103439. [2021-07-09 18:55:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103439 states, 103438 states have (on average 4.69710357895551) internal successors, (485859), 103438 states have internal predecessors, (485859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103439 states to 103439 states and 485859 transitions. [2021-07-09 18:55:33,771 INFO L78 Accepts]: Start accepts. Automaton has 103439 states and 485859 transitions. Word has length 25 [2021-07-09 18:55:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:33,771 INFO L482 AbstractCegarLoop]: Abstraction has 103439 states and 485859 transitions. [2021-07-09 18:55:33,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:55:33,771 INFO L276 IsEmpty]: Start isEmpty. Operand 103439 states and 485859 transitions. [2021-07-09 18:55:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:55:34,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:34,086 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:55:34,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 18:55:34,289 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:34,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:34,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1996714358, now seen corresponding path program 9 times [2021-07-09 18:55:34,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:34,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344131287] [2021-07-09 18:55:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:55:34,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:34,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344131287] [2021-07-09 18:55:34,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344131287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:34,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324835643] [2021-07-09 18:55:34,350 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 [2021-07-09 18:55:34,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:55:34,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:55:34,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:55:34,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:55:34,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324835643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:34,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:34,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:55:34,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246075788] [2021-07-09 18:55:34,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:55:34,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:34,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:55:34,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:55:34,430 INFO L87 Difference]: Start difference. First operand 103439 states and 485859 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:55:35,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:35,525 INFO L93 Difference]: Finished difference Result 104315 states and 489264 transitions. [2021-07-09 18:55:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:55:35,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:55:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:36,373 INFO L225 Difference]: With dead ends: 104315 [2021-07-09 18:55:36,373 INFO L226 Difference]: Without dead ends: 104239 [2021-07-09 18:55:36,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:55:36,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104239 states. [2021-07-09 18:55:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104239 to 103480. [2021-07-09 18:55:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103480 states, 103479 states have (on average 4.696981996347085) internal successors, (486039), 103479 states have internal predecessors, (486039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103480 states to 103480 states and 486039 transitions. [2021-07-09 18:55:39,828 INFO L78 Accepts]: Start accepts. Automaton has 103480 states and 486039 transitions. Word has length 25 [2021-07-09 18:55:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:39,828 INFO L482 AbstractCegarLoop]: Abstraction has 103480 states and 486039 transitions. [2021-07-09 18:55:39,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:55:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 103480 states and 486039 transitions. [2021-07-09 18:55:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:55:40,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:40,475 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:55:40,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 18:55:40,689 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash -247614478, now seen corresponding path program 10 times [2021-07-09 18:55:40,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:40,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877781734] [2021-07-09 18:55:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:55:40,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:40,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877781734] [2021-07-09 18:55:40,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877781734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:40,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132273078] [2021-07-09 18:55:40,773 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 [2021-07-09 18:55:40,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:55:40,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:55:40,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:55:40,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:55:40,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132273078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:40,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:40,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:55:40,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247620440] [2021-07-09 18:55:40,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:55:40,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:40,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:55:40,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:55:40,854 INFO L87 Difference]: Start difference. First operand 103480 states and 486039 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:55:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:41,916 INFO L93 Difference]: Finished difference Result 104856 states and 491459 transitions. [2021-07-09 18:55:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:55:41,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:55:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:42,812 INFO L225 Difference]: With dead ends: 104856 [2021-07-09 18:55:42,812 INFO L226 Difference]: Without dead ends: 104768 [2021-07-09 18:55:42,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:55:42,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104768 states. [2021-07-09 18:55:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104768 to 103498. [2021-07-09 18:55:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103498 states, 103497 states have (on average 4.697083007236925) internal successors, (486134), 103497 states have internal predecessors, (486134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103498 states to 103498 states and 486134 transitions. [2021-07-09 18:55:46,351 INFO L78 Accepts]: Start accepts. Automaton has 103498 states and 486134 transitions. Word has length 25 [2021-07-09 18:55:46,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:46,351 INFO L482 AbstractCegarLoop]: Abstraction has 103498 states and 486134 transitions. [2021-07-09 18:55:46,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:55:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 103498 states and 486134 transitions. [2021-07-09 18:55:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:55:46,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:46,985 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:55:47,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:47,201 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:47,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:47,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1683892410, now seen corresponding path program 11 times [2021-07-09 18:55:47,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:47,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835963789] [2021-07-09 18:55:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:47,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:47,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835963789] [2021-07-09 18:55:47,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835963789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:47,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25597782] [2021-07-09 18:55:47,247 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 [2021-07-09 18:55:47,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:55:47,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:55:47,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:55:47,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:47,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25597782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:47,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:47,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:55:47,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747279941] [2021-07-09 18:55:47,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:55:47,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:47,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:55:47,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:55:47,314 INFO L87 Difference]: Start difference. First operand 103498 states and 486134 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:55:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:48,671 INFO L93 Difference]: Finished difference Result 105284 states and 493087 transitions. [2021-07-09 18:55:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:55:48,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:55:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:49,711 INFO L225 Difference]: With dead ends: 105284 [2021-07-09 18:55:49,711 INFO L226 Difference]: Without dead ends: 105184 [2021-07-09 18:55:49,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:55:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105184 states. [2021-07-09 18:55:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105184 to 103515. [2021-07-09 18:55:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103515 states, 103514 states have (on average 4.69741291033097) internal successors, (486248), 103514 states have internal predecessors, (486248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103515 states to 103515 states and 486248 transitions. [2021-07-09 18:55:53,776 INFO L78 Accepts]: Start accepts. Automaton has 103515 states and 486248 transitions. Word has length 25 [2021-07-09 18:55:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:53,776 INFO L482 AbstractCegarLoop]: Abstraction has 103515 states and 486248 transitions. [2021-07-09 18:55:53,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:55:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 103515 states and 486248 transitions. [2021-07-09 18:55:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:55:54,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:54,075 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] [2021-07-09 18:55:54,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:54,277 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:54,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1492192234, now seen corresponding path program 18 times [2021-07-09 18:55:54,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:54,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670011863] [2021-07-09 18:55:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:54,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:54,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670011863] [2021-07-09 18:55:54,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670011863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:54,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282451187] [2021-07-09 18:55:54,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:54,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:55:54,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:55:54,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:55:54,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:54,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282451187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:54,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:54,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-09 18:55:54,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970097668] [2021-07-09 18:55:54,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:55:54,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:54,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:55:54,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:55:54,381 INFO L87 Difference]: Start difference. First operand 103515 states and 486248 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:55,900 INFO L93 Difference]: Finished difference Result 118688 states and 551898 transitions. [2021-07-09 18:55:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:55:55,900 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 [2021-07-09 18:55:55,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:56,593 INFO L225 Difference]: With dead ends: 118688 [2021-07-09 18:55:56,593 INFO L226 Difference]: Without dead ends: 118688 [2021-07-09 18:55:56,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:55:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118688 states. [2021-07-09 18:55:59,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118688 to 105619. [2021-07-09 18:55:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105619 states, 105618 states have (on average 4.697987085534662) internal successors, (496192), 105618 states have internal predecessors, (496192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105619 states to 105619 states and 496192 transitions. [2021-07-09 18:56:00,539 INFO L78 Accepts]: Start accepts. Automaton has 105619 states and 496192 transitions. Word has length 25 [2021-07-09 18:56:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:56:00,539 INFO L482 AbstractCegarLoop]: Abstraction has 105619 states and 496192 transitions. [2021-07-09 18:56:00,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:00,539 INFO L276 IsEmpty]: Start isEmpty. Operand 105619 states and 496192 transitions. [2021-07-09 18:56:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:56:00,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:56:00,812 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:56:01,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:01,013 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:56:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:56:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1850358678, now seen corresponding path program 12 times [2021-07-09 18:56:01,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:56:01,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229315512] [2021-07-09 18:56:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:56:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:56:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:56:01,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:56:01,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229315512] [2021-07-09 18:56:01,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229315512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:01,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041054216] [2021-07-09 18:56:01,063 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:01,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:56:01,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:56:01,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:56:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:56:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:56:01,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041054216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:01,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:56:01,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:56:01,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531199094] [2021-07-09 18:56:01,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:56:01,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:56:01,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:56:01,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:56:01,498 INFO L87 Difference]: Start difference. First operand 105619 states and 496192 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:56:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:56:02,519 INFO L93 Difference]: Finished difference Result 108208 states and 506403 transitions. [2021-07-09 18:56:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:56:02,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:56:02,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:56:03,386 INFO L225 Difference]: With dead ends: 108208 [2021-07-09 18:56:03,387 INFO L226 Difference]: Without dead ends: 108108 [2021-07-09 18:56:03,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:56:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108108 states. [2021-07-09 18:56:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108108 to 105643. [2021-07-09 18:56:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105643 states, 105642 states have (on average 4.698443800761061) internal successors, (496353), 105642 states have internal predecessors, (496353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105643 states to 105643 states and 496353 transitions. [2021-07-09 18:56:06,805 INFO L78 Accepts]: Start accepts. Automaton has 105643 states and 496353 transitions. Word has length 25 [2021-07-09 18:56:06,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:56:06,805 INFO L482 AbstractCegarLoop]: Abstraction has 105643 states and 496353 transitions. [2021-07-09 18:56:06,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:56:06,805 INFO L276 IsEmpty]: Start isEmpty. Operand 105643 states and 496353 transitions. [2021-07-09 18:56:07,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:56:07,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:56:07,490 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:56:07,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:07,713 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:56:07,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:56:07,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1617035950, now seen corresponding path program 13 times [2021-07-09 18:56:07,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:56:07,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494436135] [2021-07-09 18:56:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:56:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:56:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:56:07,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:56:07,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494436135] [2021-07-09 18:56:07,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494436135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:07,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891298483] [2021-07-09 18:56:07,776 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:56:07,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:56:07,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:56:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:56:07,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891298483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:07,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:56:07,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:56:07,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420453949] [2021-07-09 18:56:07,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:56:07,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:56:07,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:56:07,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:56:07,834 INFO L87 Difference]: Start difference. First operand 105643 states and 496353 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:56:08,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:56:08,888 INFO L93 Difference]: Finished difference Result 108139 states and 506170 transitions. [2021-07-09 18:56:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:56:08,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:56:08,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:56:09,768 INFO L225 Difference]: With dead ends: 108139 [2021-07-09 18:56:09,768 INFO L226 Difference]: Without dead ends: 108063 [2021-07-09 18:56:09,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:56:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108063 states. [2021-07-09 18:56:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108063 to 105670. [2021-07-09 18:56:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105670 states, 105669 states have (on average 4.69866280555319) internal successors, (496503), 105669 states have internal predecessors, (496503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105670 states to 105670 states and 496503 transitions. [2021-07-09 18:56:13,210 INFO L78 Accepts]: Start accepts. Automaton has 105670 states and 496503 transitions. Word has length 25 [2021-07-09 18:56:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:56:13,211 INFO L482 AbstractCegarLoop]: Abstraction has 105670 states and 496503 transitions. [2021-07-09 18:56:13,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:56:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 105670 states and 496503 transitions. [2021-07-09 18:56:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:56:14,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:56:14,112 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:56:14,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:14,335 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:56:14,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:56:14,335 INFO L82 PathProgramCache]: Analyzing trace with hash 132063930, now seen corresponding path program 14 times [2021-07-09 18:56:14,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:56:14,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569877187] [2021-07-09 18:56:14,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:56:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:56:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:56:14,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:56:14,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569877187] [2021-07-09 18:56:14,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569877187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:14,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561475153] [2021-07-09 18:56:14,448 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:14,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:56:14,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:56:14,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:56:14,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:56:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:56:14,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561475153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:14,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:56:14,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:56:14,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808260289] [2021-07-09 18:56:14,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:56:14,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:56:14,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:56:14,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:56:14,563 INFO L87 Difference]: Start difference. First operand 105670 states and 496503 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:56:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:56:15,975 INFO L93 Difference]: Finished difference Result 107419 states and 503279 transitions. [2021-07-09 18:56:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:56:15,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:56:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:56:17,316 INFO L225 Difference]: With dead ends: 107419 [2021-07-09 18:56:17,317 INFO L226 Difference]: Without dead ends: 107331 [2021-07-09 18:56:17,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:56:17,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107331 states. [2021-07-09 18:56:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107331 to 105677. [2021-07-09 18:56:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105677 states, 105676 states have (on average 4.698938264128089) internal successors, (496565), 105676 states have internal predecessors, (496565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105677 states to 105677 states and 496565 transitions. [2021-07-09 18:56:20,807 INFO L78 Accepts]: Start accepts. Automaton has 105677 states and 496565 transitions. Word has length 25 [2021-07-09 18:56:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:56:20,808 INFO L482 AbstractCegarLoop]: Abstraction has 105677 states and 496565 transitions. [2021-07-09 18:56:20,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:56:20,808 INFO L276 IsEmpty]: Start isEmpty. Operand 105677 states and 496565 transitions. [2021-07-09 18:56:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:56:21,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:56:21,493 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:56:21,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 18:56:21,717 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:56:21,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:56:21,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1826075754, now seen corresponding path program 15 times [2021-07-09 18:56:21,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:56:21,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856461039] [2021-07-09 18:56:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:56:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:56:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:56:21,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:56:21,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856461039] [2021-07-09 18:56:21,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856461039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:21,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27010875] [2021-07-09 18:56:21,770 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:21,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:56:21,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:56:21,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:56:21,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:56:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:56:21,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27010875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:21,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:56:21,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:56:21,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795687370] [2021-07-09 18:56:21,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:56:21,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:56:21,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:56:21,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:56:21,836 INFO L87 Difference]: Start difference. First operand 105677 states and 496565 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:56:22,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:56:22,944 INFO L93 Difference]: Finished difference Result 108226 states and 506520 transitions. [2021-07-09 18:56:22,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:56:22,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:56:22,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:56:23,864 INFO L225 Difference]: With dead ends: 108226 [2021-07-09 18:56:23,865 INFO L226 Difference]: Without dead ends: 108150 [2021-07-09 18:56:23,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:56:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108150 states. [2021-07-09 18:56:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108150 to 105719. [2021-07-09 18:56:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105719 states, 105718 states have (on average 4.699351103880134) internal successors, (496806), 105718 states have internal predecessors, (496806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105719 states to 105719 states and 496806 transitions. [2021-07-09 18:56:27,719 INFO L78 Accepts]: Start accepts. Automaton has 105719 states and 496806 transitions. Word has length 25 [2021-07-09 18:56:27,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:56:27,719 INFO L482 AbstractCegarLoop]: Abstraction has 105719 states and 496806 transitions. [2021-07-09 18:56:27,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:56:27,719 INFO L276 IsEmpty]: Start isEmpty. Operand 105719 states and 496806 transitions. [2021-07-09 18:56:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:56:28,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:56:28,031 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:56:28,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 18:56:28,231 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:56:28,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:56:28,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159402, now seen corresponding path program 16 times [2021-07-09 18:56:28,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:56:28,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36921137] [2021-07-09 18:56:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:56:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:56:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:56:28,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:56:28,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36921137] [2021-07-09 18:56:28,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36921137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:28,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782302889] [2021-07-09 18:56:28,300 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:28,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:56:28,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:56:28,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:56:28,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:56:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:56:28,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782302889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:28,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:56:28,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:56:28,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534869605] [2021-07-09 18:56:28,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:56:28,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:56:28,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:56:28,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:56:28,378 INFO L87 Difference]: Start difference. First operand 105719 states and 496806 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:56:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:56:29,732 INFO L93 Difference]: Finished difference Result 107874 states and 505312 transitions. [2021-07-09 18:56:29,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:56:29,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:56:29,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:56:30,312 INFO L225 Difference]: With dead ends: 107874 [2021-07-09 18:56:30,312 INFO L226 Difference]: Without dead ends: 107798 [2021-07-09 18:56:30,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:56:30,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107798 states. [2021-07-09 18:56:33,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107798 to 105741. [2021-07-09 18:56:33,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105741 states, 105740 states have (on average 4.69966899943257) internal successors, (496943), 105740 states have internal predecessors, (496943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105741 states to 105741 states and 496943 transitions. [2021-07-09 18:56:34,268 INFO L78 Accepts]: Start accepts. Automaton has 105741 states and 496943 transitions. Word has length 25 [2021-07-09 18:56:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:56:34,268 INFO L482 AbstractCegarLoop]: Abstraction has 105741 states and 496943 transitions. [2021-07-09 18:56:34,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:56:34,269 INFO L276 IsEmpty]: Start isEmpty. Operand 105741 states and 496943 transitions. [2021-07-09 18:56:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:56:34,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:56:34,564 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:56:34,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:34,765 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:56:34,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:56:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1420708014, now seen corresponding path program 17 times [2021-07-09 18:56:34,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:56:34,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283653530] [2021-07-09 18:56:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:56:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:56:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:56:34,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:56:34,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283653530] [2021-07-09 18:56:34,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283653530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:34,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117290335] [2021-07-09 18:56:34,826 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:34,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:56:34,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:56:34,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:56:34,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:56:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:56:34,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117290335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:34,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:56:34,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:56:34,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303907482] [2021-07-09 18:56:34,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:56:34,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:56:34,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:56:34,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:56:34,898 INFO L87 Difference]: Start difference. First operand 105741 states and 496943 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-07-09 18:56:36,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:56:36,489 INFO L93 Difference]: Finished difference Result 107237 states and 502736 transitions. [2021-07-09 18:56:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:56:36,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-07-09 18:56:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:56:37,537 INFO L225 Difference]: With dead ends: 107237 [2021-07-09 18:56:37,537 INFO L226 Difference]: Without dead ends: 107149 [2021-07-09 18:56:37,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:56:37,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107149 states. Received shutdown request... [2021-07-09 18:56:37,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-09 18:56:37,993 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:56:37,994 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:56:37,996 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:56:37,996 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:56:37 BasicIcfg [2021-07-09 18:56:37,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:56:37,997 INFO L168 Benchmark]: Toolchain (without parser) took 583913.27 ms. Allocated memory was 186.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 167.4 MB in the beginning and 6.7 GB in the end (delta: -6.5 GB). Peak memory consumption was 4.0 GB. Max. memory is 8.0 GB. [2021-07-09 18:56:37,997 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 186.6 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:56:38,000 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.70 ms. Allocated memory is still 186.6 MB. Free memory was 167.2 MB in the beginning and 165.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:56:38,000 INFO L168 Benchmark]: Boogie Preprocessor took 15.80 ms. Allocated memory is still 186.6 MB. Free memory was 165.9 MB in the beginning and 164.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:56:38,000 INFO L168 Benchmark]: RCFGBuilder took 324.37 ms. Allocated memory is still 186.6 MB. Free memory was 164.8 MB in the beginning and 151.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:56:38,000 INFO L168 Benchmark]: TraceAbstraction took 583542.87 ms. Allocated memory was 186.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 150.6 MB in the beginning and 6.7 GB in the end (delta: -6.6 GB). Peak memory consumption was 4.0 GB. Max. memory is 8.0 GB. [2021-07-09 18:56:38,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 186.6 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.70 ms. Allocated memory is still 186.6 MB. Free memory was 167.2 MB in the beginning and 165.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.80 ms. Allocated memory is still 186.6 MB. Free memory was 165.9 MB in the beginning and 164.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 324.37 ms. Allocated memory is still 186.6 MB. Free memory was 164.8 MB in the beginning and 151.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 583542.87 ms. Allocated memory was 186.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 150.6 MB in the beginning and 6.7 GB in the end (delta: -6.6 GB). Peak memory consumption was 4.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 50 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 583399.6ms, OverallIterations: 100, TraceHistogramMax: 2, EmptinessCheckTime: 33375.2ms, AutomataDifference: 193757.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 75.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4986 SDtfs, 10549 SDslu, 17327 SDs, 0 SdLazy, 18775 SolverSat, 3275 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11106.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3154 GetRequests, 1969 SyntacticMatches, 181 SemanticMatches, 1004 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3539 ImplicationChecksByTransitivity, 10833.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=181308occurred in iteration=69, InterpolantAutomatonStates: 1091, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 318398.1ms AutomataMinimizationTime, 100 MinimizatonAttempts, 1281495 StatesRemovedByMinimization, 99 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 431.4ms SsaConstructionTime, 1174.7ms SatisfiabilityAnalysisTime, 13514.4ms InterpolantComputationTime, 4717 NumberOfCodeBlocks, 4712 NumberOfCodeBlocksAsserted, 276 NumberOfCheckSat, 4524 ConstructedInterpolants, 0 QuantifiedInterpolants, 20411 SizeOfPredicates, 103 NumberOfNonLiveVariables, 6485 ConjunctsInSsa, 909 ConjunctsInUnsatCore, 193 InterpolantComputations, 9 PerfectInterpolantSequences, 168/667 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown