/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-new/count_by_k.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:32:23,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:32:23,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:32:23,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:32:23,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:32:23,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:32:23,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:32:23,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:32:23,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:32:23,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:32:23,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:32:23,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:32:23,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:32:23,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:32:23,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:32:24,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:32:24,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:32:24,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:32:24,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:32:24,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:32:24,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:32:24,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:32:24,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:32:24,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:32:24,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:32:24,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:32:24,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:32:24,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:32:24,072 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:32:24,122 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:32:24,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:32:24,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:32:24,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:32:24,127 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:32:24,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:32:24,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:32:24,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:32:24,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:32:24,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:32:24,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:32:24,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:32:24,129 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:32:24,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:32:24,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:32:24,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:32:24,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:32:24,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:32:24,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:32:24,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:32:24,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:32:24,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:32:24,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:32:24,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:32:24,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:32:24,132 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:32:24,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:32:24,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:32:24,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:32:24,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:32:24,608 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:32:24,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/count_by_k.i [2020-12-22 04:32:24,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2537a2f/8d89801dcede4b6d93000745838e4d9c/FLAG100fca3d6 [2020-12-22 04:32:25,396 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:32:25,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_k.i [2020-12-22 04:32:25,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2537a2f/8d89801dcede4b6d93000745838e4d9c/FLAG100fca3d6 [2020-12-22 04:32:25,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2537a2f/8d89801dcede4b6d93000745838e4d9c [2020-12-22 04:32:25,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:32:25,757 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:32:25,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:32:25,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:32:25,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:32:25,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:32:25" (1/1) ... [2020-12-22 04:32:25,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f2dc5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:25, skipping insertion in model container [2020-12-22 04:32:25,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:32:25" (1/1) ... [2020-12-22 04:32:25,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:32:25,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:32:25,992 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_k.i[891,904] [2020-12-22 04:32:26,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:32:26,015 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:32:26,030 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_k.i[891,904] [2020-12-22 04:32:26,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:32:26,052 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:32:26,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:26 WrapperNode [2020-12-22 04:32:26,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:32:26,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:32:26,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:32:26,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:32:26,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:26" (1/1) ... [2020-12-22 04:32:26,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:26" (1/1) ... [2020-12-22 04:32:26,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:32:26,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:32:26,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:32:26,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:32:26,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:26" (1/1) ... [2020-12-22 04:32:26,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:26" (1/1) ... [2020-12-22 04:32:26,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:26" (1/1) ... [2020-12-22 04:32:26,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:26" (1/1) ... [2020-12-22 04:32:26,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:26" (1/1) ... [2020-12-22 04:32:26,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:26" (1/1) ... [2020-12-22 04:32:26,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:26" (1/1) ... [2020-12-22 04:32:26,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:32:26,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:32:26,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:32:26,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:32:26,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:26" (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 [2020-12-22 04:32:26,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:32:26,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:32:26,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:32:26,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:32:26,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:32:26,600 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:32:26,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:32:26 BoogieIcfgContainer [2020-12-22 04:32:26,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:32:26,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:32:26,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:32:26,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:32:26,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:32:25" (1/3) ... [2020-12-22 04:32:26,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2061f4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:32:26, skipping insertion in model container [2020-12-22 04:32:26,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:26" (2/3) ... [2020-12-22 04:32:26,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2061f4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:32:26, skipping insertion in model container [2020-12-22 04:32:26,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:32:26" (3/3) ... [2020-12-22 04:32:26,613 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2020-12-22 04:32:26,622 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:32:26,627 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:32:26,660 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:32:26,691 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:32:26,691 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:32:26,692 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:32:26,692 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:32:26,692 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:32:26,692 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:32:26,692 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:32:26,692 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:32:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-22 04:32:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:32:26,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:26,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:26,718 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:26,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1807120264, now seen corresponding path program 1 times [2020-12-22 04:32:26,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:26,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5166910] [2020-12-22 04:32:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:26,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5166910] [2020-12-22 04:32:26,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:32:26,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:32:26,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437173002] [2020-12-22 04:32:26,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:32:26,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:26,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:32:26,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:32:26,947 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-22 04:32:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:26,969 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-22 04:32:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:32:26,971 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-22 04:32:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:26,982 INFO L225 Difference]: With dead ends: 21 [2020-12-22 04:32:26,982 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 04:32:26,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:32:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 04:32:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-22 04:32:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:32:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 04:32:27,027 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-22 04:32:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:27,027 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 04:32:27,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:32:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 04:32:27,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:32:27,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:27,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:27,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:32:27,029 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:27,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:27,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1806941518, now seen corresponding path program 1 times [2020-12-22 04:32:27,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:27,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791662594] [2020-12-22 04:32:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:27,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791662594] [2020-12-22 04:32:27,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:32:27,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 04:32:27,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072025137] [2020-12-22 04:32:27,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:32:27,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:27,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:32:27,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:32:27,326 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2020-12-22 04:32:27,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:27,410 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-22 04:32:27,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:32:27,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 04:32:27,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:27,411 INFO L225 Difference]: With dead ends: 15 [2020-12-22 04:32:27,412 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:32:27,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:32:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:32:27,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-12-22 04:32:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:32:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-22 04:32:27,423 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2020-12-22 04:32:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:27,424 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-22 04:32:27,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:32:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-22 04:32:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:32:27,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:27,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:27,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:32:27,427 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:27,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:27,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1357243696, now seen corresponding path program 1 times [2020-12-22 04:32:27,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:27,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600915114] [2020-12-22 04:32:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:27,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600915114] [2020-12-22 04:32:27,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650656369] [2020-12-22 04:32:27,595 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 [2020-12-22 04:32:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:27,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:32:27,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:27,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:27,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-22 04:32:27,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413430518] [2020-12-22 04:32:27,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:32:27,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:27,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:32:27,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:32:27,807 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2020-12-22 04:32:27,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:27,903 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-22 04:32:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:32:27,904 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-22 04:32:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:27,905 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:32:27,905 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:32:27,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:32:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:32:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 04:32:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:32:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-22 04:32:27,912 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2020-12-22 04:32:27,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:27,912 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-22 04:32:27,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:32:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-22 04:32:27,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:32:27,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:27,914 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:28,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:32:28,129 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash -530250892, now seen corresponding path program 2 times [2020-12-22 04:32:28,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:28,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81154591] [2020-12-22 04:32:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:28,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81154591] [2020-12-22 04:32:28,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422203486] [2020-12-22 04:32:28,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:28,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:32:28,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:28,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:32:28,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:28,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:28,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-22 04:32:28,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822555582] [2020-12-22 04:32:28,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:32:28,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:28,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:32:28,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:32:28,447 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-12-22 04:32:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:28,640 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-22 04:32:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:32:28,641 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-22 04:32:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:28,643 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:32:28,643 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:32:28,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:32:28,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:32:28,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 04:32:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:32:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-22 04:32:28,661 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2020-12-22 04:32:28,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:28,661 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-22 04:32:28,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:32:28,662 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-22 04:32:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:32:28,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:28,664 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:28,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:28,880 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:28,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1251080700, now seen corresponding path program 3 times [2020-12-22 04:32:28,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:28,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28026178] [2020-12-22 04:32:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:29,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28026178] [2020-12-22 04:32:29,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945688946] [2020-12-22 04:32:29,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:29,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 04:32:29,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:29,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:32:29,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:29,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:29,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2020-12-22 04:32:29,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261030317] [2020-12-22 04:32:29,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:32:29,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:29,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:32:29,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:32:29,269 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 15 states. [2020-12-22 04:32:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:29,653 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-22 04:32:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:32:29,655 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2020-12-22 04:32:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:29,656 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:32:29,656 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:32:29,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:32:29,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:32:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 04:32:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:32:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-22 04:32:29,665 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 21 [2020-12-22 04:32:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:29,665 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-22 04:32:29,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:32:29,665 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-22 04:32:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:32:29,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:29,667 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:29,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:29,881 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:29,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:29,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1338239108, now seen corresponding path program 4 times [2020-12-22 04:32:29,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:29,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488480985] [2020-12-22 04:32:29,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:30,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488480985] [2020-12-22 04:32:30,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819012973] [2020-12-22 04:32:30,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:30,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:32:30,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:30,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:32:30,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:30,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:30,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2020-12-22 04:32:30,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576079884] [2020-12-22 04:32:30,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:32:30,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:30,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:32:30,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:32:30,518 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 19 states. [2020-12-22 04:32:31,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:31,399 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-12-22 04:32:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:32:31,406 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2020-12-22 04:32:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:31,407 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:32:31,407 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:32:31,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=293, Invalid=763, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:32:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:32:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 04:32:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:32:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-22 04:32:31,423 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 29 [2020-12-22 04:32:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:31,424 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-22 04:32:31,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:32:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-22 04:32:31,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:32:31,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:31,427 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:31,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:31,643 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:31,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:31,645 INFO L82 PathProgramCache]: Analyzing trace with hash -142422260, now seen corresponding path program 5 times [2020-12-22 04:32:31,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:31,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224235506] [2020-12-22 04:32:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:32,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224235506] [2020-12-22 04:32:32,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203858224] [2020-12-22 04:32:32,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:32,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-22 04:32:32,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:32,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:32:32,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:32,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:32,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2020-12-22 04:32:32,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519608497] [2020-12-22 04:32:32,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:32:32,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:32,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:32:32,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:32:32,774 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 29 states. [2020-12-22 04:32:34,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:34,436 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-12-22 04:32:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:32:34,437 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-12-22 04:32:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:34,438 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:32:34,438 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:32:34,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=580, Invalid=1582, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:32:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:32:34,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 04:32:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:32:34,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-22 04:32:34,452 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 37 [2020-12-22 04:32:34,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:34,453 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-22 04:32:34,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:32:34,456 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-22 04:32:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:32:34,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:34,459 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:34,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:32:34,673 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:34,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:34,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1096199572, now seen corresponding path program 6 times [2020-12-22 04:32:34,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:34,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362748570] [2020-12-22 04:32:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:35,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362748570] [2020-12-22 04:32:35,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083102578] [2020-12-22 04:32:35,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:35,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-22 04:32:35,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:35,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:32:35,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:35,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:35,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 27 [2020-12-22 04:32:35,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611446491] [2020-12-22 04:32:35,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:32:35,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:35,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:32:35,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:32:35,757 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 27 states. [2020-12-22 04:32:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:37,443 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-12-22 04:32:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:32:37,445 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-12-22 04:32:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:37,446 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:32:37,446 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:32:37,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:32:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:32:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 04:32:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:32:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-12-22 04:32:37,457 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 45 [2020-12-22 04:32:37,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:37,457 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-12-22 04:32:37,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:32:37,458 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-12-22 04:32:37,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 04:32:37,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:37,459 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:37,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:37,673 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:37,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:37,674 INFO L82 PathProgramCache]: Analyzing trace with hash 617055260, now seen corresponding path program 7 times [2020-12-22 04:32:37,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:37,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953466818] [2020-12-22 04:32:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:38,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953466818] [2020-12-22 04:32:38,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946596559] [2020-12-22 04:32:38,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:38,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:32:38,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:38,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:38,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 31 [2020-12-22 04:32:38,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439073638] [2020-12-22 04:32:38,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:32:38,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:38,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:32:38,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:32:38,940 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 31 states. [2020-12-22 04:32:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:41,496 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-12-22 04:32:41,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:32:41,497 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 53 [2020-12-22 04:32:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:41,498 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:32:41,498 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:32:41,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=845, Invalid=2347, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:32:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:32:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-22 04:32:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 04:32:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-12-22 04:32:41,510 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 53 [2020-12-22 04:32:41,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:41,510 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-12-22 04:32:41,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:32:41,510 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-12-22 04:32:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 04:32:41,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:41,512 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:41,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:41,721 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:41,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:41,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1856154972, now seen corresponding path program 8 times [2020-12-22 04:32:41,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:41,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40623004] [2020-12-22 04:32:41,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:42,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40623004] [2020-12-22 04:32:42,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322772496] [2020-12-22 04:32:42,813 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 [2020-12-22 04:32:42,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:32:42,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:42,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:32:42,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:43,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:43,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 35 [2020-12-22 04:32:43,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548693117] [2020-12-22 04:32:43,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:32:43,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:43,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:32:43,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1115, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:32:43,375 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 35 states. [2020-12-22 04:32:43,646 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 8 [2020-12-22 04:32:43,773 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 7 [2020-12-22 04:32:46,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:46,859 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-12-22 04:32:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:32:46,860 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 61 [2020-12-22 04:32:46,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:46,861 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:32:46,861 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:32:46,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1093, Invalid=3067, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:32:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:32:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-12-22 04:32:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 04:32:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-12-22 04:32:46,872 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 61 [2020-12-22 04:32:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:46,873 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-12-22 04:32:46,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:32:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-12-22 04:32:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 04:32:46,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:46,879 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:47,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:32:47,090 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:47,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:47,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1855985964, now seen corresponding path program 9 times [2020-12-22 04:32:47,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:47,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406705509] [2020-12-22 04:32:47,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:48,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406705509] [2020-12-22 04:32:48,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505802732] [2020-12-22 04:32:48,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:32:48,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2020-12-22 04:32:48,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:48,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:32:48,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:49,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:49,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 39 [2020-12-22 04:32:49,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139797730] [2020-12-22 04:32:49,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:32:49,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:49,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:32:49,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1399, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:32:49,084 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 39 states. [2020-12-22 04:32:49,269 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 8 [2020-12-22 04:32:49,405 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 8 [2020-12-22 04:32:49,555 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 7 [2020-12-22 04:32:49,692 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-22 04:32:49,830 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 9 [2020-12-22 04:32:49,966 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2020-12-22 04:32:50,254 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 9 [2020-12-22 04:32:53,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:53,771 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-12-22 04:32:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:32:53,773 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 69 [2020-12-22 04:32:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:53,778 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:32:53,778 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:32:53,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1373, Invalid=3883, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 04:32:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:32:53,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-22 04:32:53,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 04:32:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-12-22 04:32:53,806 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 69 [2020-12-22 04:32:53,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:53,808 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-12-22 04:32:53,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:32:53,809 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-12-22 04:32:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 04:32:53,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:53,819 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:54,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:54,035 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:54,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:54,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1676159052, now seen corresponding path program 10 times [2020-12-22 04:32:54,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:54,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043389817] [2020-12-22 04:32:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:55,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043389817] [2020-12-22 04:32:55,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50645025] [2020-12-22 04:32:55,793 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 [2020-12-22 04:32:55,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:32:55,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:55,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:32:55,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:56,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:56,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 43 [2020-12-22 04:32:56,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114168993] [2020-12-22 04:32:56,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:32:56,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:56,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:32:56,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1715, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:32:56,453 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 43 states. [2020-12-22 04:32:56,667 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 8 [2020-12-22 04:32:56,830 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 8 [2020-12-22 04:32:56,994 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 7 [2020-12-22 04:32:57,150 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-22 04:32:57,314 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-22 04:32:57,471 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-22 04:32:57,645 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-12-22 04:32:57,807 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-22 04:32:57,961 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 9 [2020-12-22 04:32:58,116 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2020-12-22 04:32:58,276 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 9 [2020-12-22 04:32:58,611 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 9 [2020-12-22 04:33:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:02,365 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-12-22 04:33:02,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:33:02,366 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 77 [2020-12-22 04:33:02,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:02,368 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:33:02,368 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:33:02,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1685, Invalid=4795, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 04:33:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:33:02,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-22 04:33:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 04:33:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-12-22 04:33:02,379 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 77 [2020-12-22 04:33:02,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:02,380 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-12-22 04:33:02,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:33:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-12-22 04:33:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 04:33:02,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:02,382 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:02,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:02,593 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:02,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:02,594 INFO L82 PathProgramCache]: Analyzing trace with hash -246641092, now seen corresponding path program 11 times [2020-12-22 04:33:02,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:02,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12345063] [2020-12-22 04:33:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:04,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12345063] [2020-12-22 04:33:04,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978078555] [2020-12-22 04:33:04,797 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 [2020-12-22 04:33:04,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2020-12-22 04:33:04,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:04,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:33:04,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:07,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:07,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 65 [2020-12-22 04:33:07,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989703184] [2020-12-22 04:33:07,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 04:33:07,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:07,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 04:33:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=3779, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:33:07,888 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 65 states. [2020-12-22 04:33:08,137 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 8 [2020-12-22 04:33:08,446 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2020-12-22 04:33:08,744 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 7 [2020-12-22 04:33:09,057 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 9 [2020-12-22 04:33:09,370 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2020-12-22 04:33:09,711 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2020-12-22 04:33:10,039 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2020-12-22 04:33:10,401 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 9 [2020-12-22 04:33:10,725 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2020-12-22 04:33:11,026 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-12-22 04:33:11,337 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-12-22 04:33:11,658 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2020-12-22 04:33:11,969 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2020-12-22 04:33:12,287 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-12-22 04:33:12,601 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-22 04:33:12,929 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 9 [2020-12-22 04:33:13,259 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-22 04:33:13,599 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-12-22 04:33:13,925 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-22 04:33:14,232 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-22 04:33:14,554 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-22 04:33:14,867 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-22 04:33:15,163 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-22 04:33:15,449 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-22 04:33:15,735 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-22 04:33:16,019 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-22 04:33:16,289 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2020-12-22 04:33:19,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:19,533 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-12-22 04:33:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:33:19,535 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 85 [2020-12-22 04:33:19,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:19,536 INFO L225 Difference]: With dead ends: 98 [2020-12-22 04:33:19,536 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 04:33:19,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=2860, Invalid=8482, Unknown=0, NotChecked=0, Total=11342 [2020-12-22 04:33:19,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 04:33:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-22 04:33:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 04:33:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2020-12-22 04:33:19,551 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 85 [2020-12-22 04:33:19,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:19,551 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2020-12-22 04:33:19,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 04:33:19,551 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2020-12-22 04:33:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 04:33:19,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:19,553 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:19,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:33:19,768 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:19,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:19,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1036401860, now seen corresponding path program 12 times [2020-12-22 04:33:19,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:19,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342387942] [2020-12-22 04:33:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:22,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342387942] [2020-12-22 04:33:22,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946152259] [2020-12-22 04:33:22,534 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 [2020-12-22 04:33:22,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2020-12-22 04:33:22,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:22,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:33:22,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:23,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:23,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 51 [2020-12-22 04:33:23,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350770272] [2020-12-22 04:33:23,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 04:33:23,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:23,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 04:33:23,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2443, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:33:23,456 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 51 states. [2020-12-22 04:33:23,755 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 8 [2020-12-22 04:33:23,976 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 8 [2020-12-22 04:33:24,196 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 7 [2020-12-22 04:33:24,417 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-22 04:33:24,648 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-22 04:33:24,861 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-22 04:33:25,084 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-12-22 04:33:25,322 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-22 04:33:25,571 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 9 [2020-12-22 04:33:25,798 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-22 04:33:26,035 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 9 [2020-12-22 04:33:26,245 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-22 04:33:26,466 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-22 04:33:26,685 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-22 04:33:26,910 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-12-22 04:33:27,143 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-22 04:33:27,371 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 9 [2020-12-22 04:33:27,588 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2020-12-22 04:33:27,819 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 9 [2020-12-22 04:33:28,028 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 9 [2020-12-22 04:33:28,242 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 9 [2020-12-22 04:33:28,474 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 9 [2020-12-22 04:33:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:33,308 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2020-12-22 04:33:33,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 04:33:33,309 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 93 [2020-12-22 04:33:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:33,311 INFO L225 Difference]: With dead ends: 106 [2020-12-22 04:33:33,311 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 04:33:33,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=2405, Invalid=6907, Unknown=0, NotChecked=0, Total=9312 [2020-12-22 04:33:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 04:33:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-12-22 04:33:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 04:33:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-12-22 04:33:33,324 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 93 [2020-12-22 04:33:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:33,325 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-12-22 04:33:33,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 04:33:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-12-22 04:33:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 04:33:33,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:33,327 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:33,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:33:33,542 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:33,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1225581388, now seen corresponding path program 13 times [2020-12-22 04:33:33,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:33,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302498831] [2020-12-22 04:33:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:37,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302498831] [2020-12-22 04:33:37,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886992079] [2020-12-22 04:33:37,028 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 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 [2020-12-22 04:33:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:33:37,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:38,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:38,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 55 [2020-12-22 04:33:38,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797444722] [2020-12-22 04:33:38,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 04:33:38,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:38,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 04:33:38,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2855, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:33:38,172 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 55 states. [2020-12-22 04:33:38,500 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 8 [2020-12-22 04:33:38,737 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 8 [2020-12-22 04:33:38,980 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 7 [2020-12-22 04:33:39,236 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-22 04:33:39,503 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 9 [2020-12-22 04:33:39,748 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-22 04:33:40,001 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-12-22 04:33:40,257 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-22 04:33:40,531 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-22 04:33:40,777 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-22 04:33:41,034 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-12-22 04:33:41,288 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-22 04:33:41,552 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 9 [2020-12-22 04:33:41,802 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-22 04:33:42,046 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 9 [2020-12-22 04:33:42,299 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-22 04:33:42,558 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-22 04:33:42,829 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-22 04:33:43,094 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-12-22 04:33:43,351 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-22 04:33:43,607 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 9 [2020-12-22 04:33:43,865 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2020-12-22 04:33:44,120 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 9 [2020-12-22 04:33:44,376 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 9 [2020-12-22 04:33:44,635 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 9 [2020-12-22 04:33:50,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:50,405 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2020-12-22 04:33:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:33:50,408 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 101 [2020-12-22 04:33:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:50,410 INFO L225 Difference]: With dead ends: 114 [2020-12-22 04:33:50,410 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 04:33:50,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=2813, Invalid=8107, Unknown=0, NotChecked=0, Total=10920 [2020-12-22 04:33:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 04:33:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-12-22 04:33:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 04:33:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2020-12-22 04:33:50,424 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 101 [2020-12-22 04:33:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:50,425 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2020-12-22 04:33:50,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 04:33:50,425 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2020-12-22 04:33:50,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 04:33:50,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:50,427 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:50,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:33:50,643 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:50,646 INFO L82 PathProgramCache]: Analyzing trace with hash -760708652, now seen corresponding path program 14 times [2020-12-22 04:33:50,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:50,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398321507] [2020-12-22 04:33:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:54,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398321507] [2020-12-22 04:33:54,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338697716] [2020-12-22 04:33:54,923 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 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 [2020-12-22 04:33:55,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:33:55,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:55,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:33:55,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:56,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:56,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 59 [2020-12-22 04:33:56,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117026961] [2020-12-22 04:33:56,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 04:33:56,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:56,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 04:33:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3299, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:33:56,251 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 59 states. [2020-12-22 04:33:56,604 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 8 [2020-12-22 04:33:56,883 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 8 [2020-12-22 04:33:57,167 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 7 [2020-12-22 04:33:57,475 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-12-22 04:33:57,773 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2020-12-22 04:33:58,072 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2020-12-22 04:33:58,367 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-12-22 04:33:58,668 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-22 04:33:58,963 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 9 [2020-12-22 04:33:59,261 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-22 04:33:59,557 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-12-22 04:33:59,868 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-22 04:34:00,171 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-22 04:34:00,472 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-22 04:34:00,778 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-12-22 04:34:01,085 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-22 04:34:01,407 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 9 [2020-12-22 04:34:01,709 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-22 04:34:02,016 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 9 [2020-12-22 04:34:02,323 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-22 04:34:02,632 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-22 04:34:02,938 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-22 04:34:03,200 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-12-22 04:34:03,438 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-22 04:34:03,697 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 9 [2020-12-22 04:34:03,975 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2020-12-22 04:34:04,264 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 9 [2020-12-22 04:34:04,534 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 9 [2020-12-22 04:34:04,798 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 9 [2020-12-22 04:34:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:10,839 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2020-12-22 04:34:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 04:34:10,841 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 109 [2020-12-22 04:34:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:10,843 INFO L225 Difference]: With dead ends: 122 [2020-12-22 04:34:10,843 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 04:34:10,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=3253, Invalid=9403, Unknown=0, NotChecked=0, Total=12656 [2020-12-22 04:34:10,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 04:34:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-12-22 04:34:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-22 04:34:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-12-22 04:34:10,853 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 109 [2020-12-22 04:34:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:10,854 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-12-22 04:34:10,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 04:34:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-12-22 04:34:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 04:34:10,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:10,855 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:11,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:11,069 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:11,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1843324836, now seen corresponding path program 15 times [2020-12-22 04:34:11,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:11,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020293871] [2020-12-22 04:34:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:15,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020293871] [2020-12-22 04:34:15,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602202848] [2020-12-22 04:34:15,505 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 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 [2020-12-22 04:34:15,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 56 check-sat command(s) [2020-12-22 04:34:15,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:34:15,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:16,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:16,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 63 [2020-12-22 04:34:16,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751429305] [2020-12-22 04:34:16,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 04:34:16,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:16,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 04:34:16,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=3775, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:34:16,632 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 63 states. [2020-12-22 04:34:17,017 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2020-12-22 04:34:17,292 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 8 [2020-12-22 04:34:17,586 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 7 [2020-12-22 04:34:17,894 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2020-12-22 04:34:18,223 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 9 [2020-12-22 04:34:18,565 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2020-12-22 04:34:18,895 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-12-22 04:34:19,233 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-12-22 04:34:19,568 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2020-12-22 04:34:19,891 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2020-12-22 04:34:20,234 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-12-22 04:34:20,567 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-22 04:34:20,901 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 9 [2020-12-22 04:34:21,241 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-22 04:34:21,559 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-12-22 04:34:21,871 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-22 04:34:22,179 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-22 04:34:22,514 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-22 04:34:22,834 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-12-22 04:34:23,155 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-22 04:34:23,482 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 9 [2020-12-22 04:34:23,804 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-22 04:34:24,098 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 9 [2020-12-22 04:34:24,433 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-22 04:34:24,713 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-22 04:34:25,027 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-22 04:34:25,322 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-12-22 04:34:25,627 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-22 04:34:25,932 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 9 [2020-12-22 04:34:26,232 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2020-12-22 04:34:26,511 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 9 [2020-12-22 04:34:26,802 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 9 [2020-12-22 04:34:27,097 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 9 [2020-12-22 04:34:27,380 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 9 [2020-12-22 04:34:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:33,652 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2020-12-22 04:34:33,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 04:34:33,653 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 117 [2020-12-22 04:34:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:33,654 INFO L225 Difference]: With dead ends: 130 [2020-12-22 04:34:33,654 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 04:34:33,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=3725, Invalid=10795, Unknown=0, NotChecked=0, Total=14520 [2020-12-22 04:34:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 04:34:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-12-22 04:34:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 04:34:33,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2020-12-22 04:34:33,663 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 117 [2020-12-22 04:34:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:33,663 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2020-12-22 04:34:33,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 04:34:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2020-12-22 04:34:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 04:34:33,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:33,664 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:33,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:34:33,878 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:33,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:33,879 INFO L82 PathProgramCache]: Analyzing trace with hash 922658532, now seen corresponding path program 16 times [2020-12-22 04:34:33,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:33,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362889349] [2020-12-22 04:34:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:39,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362889349] [2020-12-22 04:34:39,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507336938] [2020-12-22 04:34:39,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:34:39,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:34:39,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:39,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 04:34:39,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:40,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:40,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 67 [2020-12-22 04:34:40,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816122005] [2020-12-22 04:34:40,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 04:34:40,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:40,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 04:34:40,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4283, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 04:34:40,881 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 67 states. [2020-12-22 04:34:41,347 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2020-12-22 04:34:41,651 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 8 [2020-12-22 04:34:41,962 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 7 [2020-12-22 04:34:42,285 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2020-12-22 04:34:42,610 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 9 [2020-12-22 04:34:42,936 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2020-12-22 04:34:43,246 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2020-12-22 04:34:43,565 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2020-12-22 04:34:43,893 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 9 [2020-12-22 04:34:44,203 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2020-12-22 04:34:44,522 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-12-22 04:34:44,840 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-12-22 04:34:45,177 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2020-12-22 04:34:45,550 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2020-12-22 04:34:45,932 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-12-22 04:34:46,322 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-22 04:34:46,685 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 9 [2020-12-22 04:34:47,056 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-22 04:34:47,412 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-12-22 04:34:47,754 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-22 04:34:48,132 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-22 04:34:48,501 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-22 04:34:48,871 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-12-22 04:34:49,236 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-22 04:34:49,598 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 9 [2020-12-22 04:34:49,960 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-22 04:34:50,319 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 9 [2020-12-22 04:34:50,678 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-22 04:34:51,046 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-22 04:34:51,399 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-22 04:34:51,751 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-12-22 04:34:52,098 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-22 04:34:52,433 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 9 [2020-12-22 04:34:52,773 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2020-12-22 04:34:53,098 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 9 [2020-12-22 04:34:53,415 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 9 [2020-12-22 04:34:53,739 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 9 [2020-12-22 04:34:54,056 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 9 [2020-12-22 04:34:54,388 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 9 [2020-12-22 04:34:54,715 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 9 [2020-12-22 04:35:01,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:01,081 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2020-12-22 04:35:01,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 04:35:01,088 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 125 [2020-12-22 04:35:01,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:01,089 INFO L225 Difference]: With dead ends: 138 [2020-12-22 04:35:01,089 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 04:35:01,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=4229, Invalid=12283, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 04:35:01,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 04:35:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-12-22 04:35:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 04:35:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2020-12-22 04:35:01,098 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 125 [2020-12-22 04:35:01,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:01,099 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2020-12-22 04:35:01,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 04:35:01,099 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2020-12-22 04:35:01,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 04:35:01,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:01,100 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:01,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:35:01,314 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:01,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:01,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1758014828, now seen corresponding path program 17 times [2020-12-22 04:35:01,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:01,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067820006] [2020-12-22 04:35:01,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:07,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067820006] [2020-12-22 04:35:07,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650605618] [2020-12-22 04:35:07,875 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 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 [2020-12-22 04:35:07,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2020-12-22 04:35:07,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:07,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 04:35:07,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:17,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:17,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 101 [2020-12-22 04:35:17,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493509308] [2020-12-22 04:35:17,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-12-22 04:35:17,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:17,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-12-22 04:35:17,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=9305, Unknown=0, NotChecked=0, Total=10100 [2020-12-22 04:35:17,300 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 101 states. [2020-12-22 04:35:17,912 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 8 [2020-12-22 04:35:18,630 WARN L197 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 8 [2020-12-22 04:35:19,346 WARN L197 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 7 [2020-12-22 04:35:20,056 WARN L197 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 9 [2020-12-22 04:35:20,782 WARN L197 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 9 [2020-12-22 04:35:21,515 WARN L197 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 9 [2020-12-22 04:35:22,246 WARN L197 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 9 [2020-12-22 04:35:22,982 WARN L197 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 9 [2020-12-22 04:35:23,720 WARN L197 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 9 [2020-12-22 04:35:24,439 WARN L197 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 9 [2020-12-22 04:35:25,174 WARN L197 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 9 [2020-12-22 04:35:25,914 WARN L197 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 9 [2020-12-22 04:35:26,668 WARN L197 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 9 [2020-12-22 04:35:27,399 WARN L197 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 9 [2020-12-22 04:35:28,137 WARN L197 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 9 [2020-12-22 04:35:28,860 WARN L197 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 9 [2020-12-22 04:35:29,599 WARN L197 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 9 [2020-12-22 04:35:30,348 WARN L197 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 9 [2020-12-22 04:35:31,050 WARN L197 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 9 [2020-12-22 04:35:31,764 WARN L197 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 9 [2020-12-22 04:35:32,502 WARN L197 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2020-12-22 04:35:33,248 WARN L197 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 9 [2020-12-22 04:35:33,975 WARN L197 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2020-12-22 04:35:34,706 WARN L197 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 9 [2020-12-22 04:35:35,444 WARN L197 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2020-12-22 04:35:36,181 WARN L197 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 9 [2020-12-22 04:35:36,907 WARN L197 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2020-12-22 04:35:37,685 WARN L197 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 9 [2020-12-22 04:35:38,447 WARN L197 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2020-12-22 04:35:39,180 WARN L197 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 9 [2020-12-22 04:35:39,911 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2020-12-22 04:35:40,640 WARN L197 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 9 [2020-12-22 04:35:41,394 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2020-12-22 04:35:42,120 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2020-12-22 04:35:42,854 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2020-12-22 04:35:43,583 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2020-12-22 04:35:44,272 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2020-12-22 04:35:44,964 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2020-12-22 04:35:45,656 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2020-12-22 04:35:46,319 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-12-22 04:35:46,955 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2020-12-22 04:35:47,589 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-22 04:35:48,235 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-22 04:35:48,829 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-22 04:35:49,412 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-22 04:35:49,998 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-22 04:35:50,587 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-22 04:35:51,160 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-22 04:35:51,702 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-22 04:35:52,249 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-22 04:35:52,753 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2020-12-22 04:35:53,279 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 9 [2020-12-22 04:35:53,752 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 9 [2020-12-22 04:35:54,253 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 9 [2020-12-22 04:35:54,713 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 9 [2020-12-22 04:35:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:59,104 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2020-12-22 04:35:59,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 04:35:59,106 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 133 [2020-12-22 04:35:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:59,107 INFO L225 Difference]: With dead ends: 146 [2020-12-22 04:35:59,108 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 04:35:59,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 55.4s TimeCoverageRelationStatistics Valid=6868, Invalid=20854, Unknown=0, NotChecked=0, Total=27722 [2020-12-22 04:35:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 04:35:59,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-12-22 04:35:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-22 04:35:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2020-12-22 04:35:59,116 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 133 [2020-12-22 04:35:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:59,116 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2020-12-22 04:35:59,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-12-22 04:35:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2020-12-22 04:35:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 04:35:59,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:59,117 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:59,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:59,318 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:59,319 INFO L82 PathProgramCache]: Analyzing trace with hash -955733004, now seen corresponding path program 18 times [2020-12-22 04:35:59,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:59,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064038827] [2020-12-22 04:35:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:08,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064038827] [2020-12-22 04:36:08,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523223433] [2020-12-22 04:36:08,230 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 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 [2020-12-22 04:36:08,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2020-12-22 04:36:08,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:08,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 04:36:08,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:10,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:10,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 75 [2020-12-22 04:36:10,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453809211] [2020-12-22 04:36:10,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-22 04:36:10,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:10,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-22 04:36:10,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=5395, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:36:10,218 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 75 states. [2020-12-22 04:36:10,840 WARN L197 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2020-12-22 04:36:11,310 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 8 [2020-12-22 04:36:11,770 WARN L197 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 7 [2020-12-22 04:36:12,255 WARN L197 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2020-12-22 04:36:12,729 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 9 [2020-12-22 04:36:13,222 WARN L197 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2020-12-22 04:36:13,695 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 9 [2020-12-22 04:36:14,177 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2020-12-22 04:36:14,676 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 9 [2020-12-22 04:36:15,184 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2020-12-22 04:36:15,685 WARN L197 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 9 [2020-12-22 04:36:16,176 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2020-12-22 04:36:16,659 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 9 [2020-12-22 04:36:17,141 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2020-12-22 04:36:17,609 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2020-12-22 04:36:18,086 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2020-12-22 04:36:18,551 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 9 [2020-12-22 04:36:19,039 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2020-12-22 04:36:19,547 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-12-22 04:36:20,032 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-12-22 04:36:20,515 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2020-12-22 04:36:21,002 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2020-12-22 04:36:21,477 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-12-22 04:36:21,942 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-22 04:36:22,406 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 9 [2020-12-22 04:36:22,870 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-22 04:36:23,333 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-12-22 04:36:23,815 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-22 04:36:24,291 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-22 04:36:24,753 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-22 04:36:25,234 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-12-22 04:36:25,697 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-22 04:36:26,167 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 9 [2020-12-22 04:36:26,616 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-22 04:36:27,091 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 9 [2020-12-22 04:36:27,548 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-22 04:36:27,997 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-22 04:36:28,465 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-22 04:36:28,921 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-12-22 04:36:29,365 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-22 04:36:29,803 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 9 [2020-12-22 04:36:30,257 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2020-12-22 04:36:30,690 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 9 [2020-12-22 04:36:31,128 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 9 [2020-12-22 04:36:31,584 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 9 [2020-12-22 04:36:32,045 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 9 [2020-12-22 04:36:32,476 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 9 [2020-12-22 04:36:32,895 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 9 [2020-12-22 04:36:33,348 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 9 [2020-12-22 04:36:33,787 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 9 [2020-12-22 04:36:34,227 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 9 [2020-12-22 04:36:34,646 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 9 [2020-12-22 04:36:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:41,657 INFO L93 Difference]: Finished difference Result 154 states and 157 transitions. [2020-12-22 04:36:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-22 04:36:41,662 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 141 [2020-12-22 04:36:41,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:41,663 INFO L225 Difference]: With dead ends: 154 [2020-12-22 04:36:41,664 INFO L226 Difference]: Without dead ends: 150 [2020-12-22 04:36:41,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=5333, Invalid=15547, Unknown=0, NotChecked=0, Total=20880 [2020-12-22 04:36:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-22 04:36:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-12-22 04:36:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-22 04:36:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2020-12-22 04:36:41,673 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 141 [2020-12-22 04:36:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:41,673 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2020-12-22 04:36:41,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-22 04:36:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2020-12-22 04:36:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 04:36:41,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:41,674 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:41,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:41,882 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash -381345156, now seen corresponding path program 19 times [2020-12-22 04:36:41,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:41,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198625681] [2020-12-22 04:36:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat