/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/loops/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:17:21,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:17:21,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:17:21,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:17:21,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:17:21,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:17:21,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:17:21,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:17:21,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:17:21,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:17:21,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:17:21,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-22 04:17:21,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:17:21,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:17:21,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:17:21,909 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:17:21,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:17:21,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:17:21,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:17:21,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:17:21,966 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:17:21,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:17:21,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:17:21,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:17:21,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:17:21,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:17:21,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:17:21,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:17:21,968 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:17:21,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:17:21,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:17:21,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:17:21,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:17:21,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:17:21,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:17:21,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:17:21,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:17:21,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:17:21,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:17:21,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:17:21,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:17:21,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:17:22,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:17:22,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:17:22,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:17:22,429 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:17:22,430 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:17:22,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/eureka_01-2.c [2020-12-22 04:17:22,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cea444572/da465e8b31ba419e9ff1e142fe476b85/FLAGbcb5ceafb [2020-12-22 04:17:23,139 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:17:23,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-2.c [2020-12-22 04:17:23,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cea444572/da465e8b31ba419e9ff1e142fe476b85/FLAGbcb5ceafb [2020-12-22 04:17:23,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cea444572/da465e8b31ba419e9ff1e142fe476b85 [2020-12-22 04:17:23,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:17:23,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:17:23,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:17:23,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:17:23,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:17:23,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:17:23" (1/1) ... [2020-12-22 04:17:23,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2fbfae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:23, skipping insertion in model container [2020-12-22 04:17:23,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:17:23" (1/1) ... [2020-12-22 04:17:23,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:17:23,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:17:23,673 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/loops/eureka_01-2.c[323,336] [2020-12-22 04:17:23,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:17:23,723 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:17:23,737 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/loops/eureka_01-2.c[323,336] [2020-12-22 04:17:23,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:17:23,777 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:17:23,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:23 WrapperNode [2020-12-22 04:17:23,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:17:23,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:17:23,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:17:23,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:17:23,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:23" (1/1) ... [2020-12-22 04:17:23,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:23" (1/1) ... [2020-12-22 04:17:23,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:17:23,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:17:23,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:17:23,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:17:23,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:23" (1/1) ... [2020-12-22 04:17:23,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:23" (1/1) ... [2020-12-22 04:17:23,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:23" (1/1) ... [2020-12-22 04:17:23,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:23" (1/1) ... [2020-12-22 04:17:23,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:23" (1/1) ... [2020-12-22 04:17:23,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:23" (1/1) ... [2020-12-22 04:17:23,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:23" (1/1) ... [2020-12-22 04:17:23,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:17:23,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:17:23,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:17:23,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:17:23,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:23" (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 04:17:24,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:17:24,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:17:24,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:17:24,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:17:24,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:17:24,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:17:24,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:17:24,671 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:17:24,674 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 04:17:24,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:17:24 BoogieIcfgContainer [2020-12-22 04:17:24,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:17:24,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:17:24,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:17:24,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:17:24,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:17:23" (1/3) ... [2020-12-22 04:17:24,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67265b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:17:24, skipping insertion in model container [2020-12-22 04:17:24,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:23" (2/3) ... [2020-12-22 04:17:24,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67265b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:17:24, skipping insertion in model container [2020-12-22 04:17:24,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:17:24" (3/3) ... [2020-12-22 04:17:24,697 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2020-12-22 04:17:24,704 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:17:24,710 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:17:24,734 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:17:24,779 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:17:24,781 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:17:24,781 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:17:24,781 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:17:24,782 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:17:24,782 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:17:24,782 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:17:24,782 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:17:24,800 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-22 04:17:24,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:17:24,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:24,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:24,808 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:24,814 INFO L82 PathProgramCache]: Analyzing trace with hash 678614248, now seen corresponding path program 1 times [2020-12-22 04:17:24,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:24,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794635793] [2020-12-22 04:17:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:25,157 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 04:17:25,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794635793] [2020-12-22 04:17:25,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:17:25,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:17:25,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356245575] [2020-12-22 04:17:25,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:17:25,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:25,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:17:25,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:17:25,191 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-12-22 04:17:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:25,208 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2020-12-22 04:17:25,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:17:25,210 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-22 04:17:25,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:25,221 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:17:25,221 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:17:25,225 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 04:17:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:17:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 04:17:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:17:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2020-12-22 04:17:25,265 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2020-12-22 04:17:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:25,265 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2020-12-22 04:17:25,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:17:25,266 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2020-12-22 04:17:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:17:25,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:25,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:25,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:17:25,267 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:25,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:25,268 INFO L82 PathProgramCache]: Analyzing trace with hash 137869947, now seen corresponding path program 1 times [2020-12-22 04:17:25,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:25,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350808691] [2020-12-22 04:17:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:25,381 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 04:17:25,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350808691] [2020-12-22 04:17:25,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:17:25,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:17:25,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922603363] [2020-12-22 04:17:25,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:17:25,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:25,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:17:25,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:17:25,386 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 3 states. [2020-12-22 04:17:25,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:25,434 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-12-22 04:17:25,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:17:25,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-22 04:17:25,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:25,436 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:17:25,436 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:17:25,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:17:25,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:17:25,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-12-22 04:17:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:17:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-12-22 04:17:25,443 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 11 [2020-12-22 04:17:25,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:25,444 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-12-22 04:17:25,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:17:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-12-22 04:17:25,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:17:25,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:25,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:25,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:17:25,446 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:25,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:25,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1682093747, now seen corresponding path program 1 times [2020-12-22 04:17:25,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:25,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773955041] [2020-12-22 04:17:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:25,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773955041] [2020-12-22 04:17:25,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:17:25,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:17:25,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942175176] [2020-12-22 04:17:25,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:17:25,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:25,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:17:25,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:17:25,612 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 4 states. [2020-12-22 04:17:25,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:25,688 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-12-22 04:17:25,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:17:25,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-22 04:17:25,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:25,694 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:17:25,695 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:17:25,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:17:25,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:17:25,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2020-12-22 04:17:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:17:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-12-22 04:17:25,703 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 14 [2020-12-22 04:17:25,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:25,704 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-12-22 04:17:25,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:17:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2020-12-22 04:17:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:17:25,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:25,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:25,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:17:25,705 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:25,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:25,706 INFO L82 PathProgramCache]: Analyzing trace with hash 701151449, now seen corresponding path program 1 times [2020-12-22 04:17:25,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:25,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888680583] [2020-12-22 04:17:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:25,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888680583] [2020-12-22 04:17:25,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:17:25,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:17:25,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003877080] [2020-12-22 04:17:25,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:17:25,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:25,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:17:25,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:17:25,779 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 4 states. [2020-12-22 04:17:25,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:25,837 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2020-12-22 04:17:25,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:17:25,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-22 04:17:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:25,839 INFO L225 Difference]: With dead ends: 43 [2020-12-22 04:17:25,839 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:17:25,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:17:25,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:17:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-12-22 04:17:25,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:17:25,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-12-22 04:17:25,847 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 17 [2020-12-22 04:17:25,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:25,847 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-12-22 04:17:25,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:17:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-12-22 04:17:25,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:17:25,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:25,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:25,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 04:17:25,849 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:25,850 INFO L82 PathProgramCache]: Analyzing trace with hash -792194438, now seen corresponding path program 1 times [2020-12-22 04:17:25,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:25,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258709888] [2020-12-22 04:17:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:17:25,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258709888] [2020-12-22 04:17:25,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:17:25,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:17:25,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16856534] [2020-12-22 04:17:25,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:17:25,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:25,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:17:25,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:17:25,925 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 4 states. [2020-12-22 04:17:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:26,032 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-12-22 04:17:26,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:17:26,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-22 04:17:26,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:26,037 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:17:26,037 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:17:26,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:17:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:17:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2020-12-22 04:17:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:17:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-22 04:17:26,050 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2020-12-22 04:17:26,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:26,052 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-22 04:17:26,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:17:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-22 04:17:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:17:26,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:26,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:26,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 04:17:26,057 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:26,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:26,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1624635408, now seen corresponding path program 1 times [2020-12-22 04:17:26,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:26,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147060475] [2020-12-22 04:17:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:17:26,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147060475] [2020-12-22 04:17:26,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791523540] [2020-12-22 04:17:26,235 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 04:17:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:26,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:17:26,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:17:26,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:26,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 04:17:26,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594709837] [2020-12-22 04:17:26,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:17:26,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:26,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:17:26,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:17:26,513 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-12-22 04:17:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:26,609 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-12-22 04:17:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:17:26,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-12-22 04:17:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:26,612 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:17:26,613 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:17:26,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:17:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:17:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-12-22 04:17:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:17:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-12-22 04:17:26,634 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-12-22 04:17:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:26,635 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-12-22 04:17:26,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:17:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-12-22 04:17:26,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:17:26,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:26,644 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:26,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:17:26,860 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:26,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1665429544, now seen corresponding path program 2 times [2020-12-22 04:17:26,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:26,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162217739] [2020-12-22 04:17:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:17:26,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162217739] [2020-12-22 04:17:26,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045322800] [2020-12-22 04:17:26,987 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 04:17:27,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:17:27,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:27,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:17:27,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:17:27,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:17:27,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-12-22 04:17:27,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407792575] [2020-12-22 04:17:27,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:17:27,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:27,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:17:27,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:17:27,177 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 4 states. [2020-12-22 04:17:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:27,243 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-12-22 04:17:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:17:27,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-22 04:17:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:27,245 INFO L225 Difference]: With dead ends: 65 [2020-12-22 04:17:27,245 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:17:27,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:17:27,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:17:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2020-12-22 04:17:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:17:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-22 04:17:27,253 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 26 [2020-12-22 04:17:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:27,253 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-22 04:17:27,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:17:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-22 04:17:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:17:27,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:27,255 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:27,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:27,470 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:27,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:27,471 INFO L82 PathProgramCache]: Analyzing trace with hash 847781094, now seen corresponding path program 1 times [2020-12-22 04:17:27,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:27,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125448158] [2020-12-22 04:17:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:17:27,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125448158] [2020-12-22 04:17:27,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742045743] [2020-12-22 04:17:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:27,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:17:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:17:27,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:27,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 04:17:27,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063058406] [2020-12-22 04:17:27,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:17:27,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:27,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:17:27,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:17:27,716 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 8 states. [2020-12-22 04:17:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:27,771 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-12-22 04:17:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:17:27,771 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-22 04:17:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:27,772 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:17:27,772 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:17:27,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:17:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:17:27,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-12-22 04:17:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:17:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-12-22 04:17:27,779 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 26 [2020-12-22 04:17:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:27,779 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-12-22 04:17:27,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:17:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-12-22 04:17:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:17:27,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:27,780 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:27,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:27,994 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:27,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:27,995 INFO L82 PathProgramCache]: Analyzing trace with hash -2081334224, now seen corresponding path program 2 times [2020-12-22 04:17:27,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:27,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683516808] [2020-12-22 04:17:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:17:28,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683516808] [2020-12-22 04:17:28,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880338518] [2020-12-22 04:17:28,102 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 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 04:17:28,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:17:28,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:28,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:17:28,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:17:28,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:28,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 04:17:28,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409717442] [2020-12-22 04:17:28,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:17:28,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:28,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:17:28,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:17:28,356 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 10 states. [2020-12-22 04:17:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:28,434 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-12-22 04:17:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:17:28,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-12-22 04:17:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:28,438 INFO L225 Difference]: With dead ends: 57 [2020-12-22 04:17:28,438 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 04:17:28,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:17:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 04:17:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-12-22 04:17:28,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:17:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-12-22 04:17:28,450 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 29 [2020-12-22 04:17:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:28,450 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-12-22 04:17:28,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:17:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-12-22 04:17:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:17:28,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:28,452 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:28,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:28,671 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:28,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1789747366, now seen corresponding path program 3 times [2020-12-22 04:17:28,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:28,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426252629] [2020-12-22 04:17:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:17:28,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426252629] [2020-12-22 04:17:28,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495610440] [2020-12-22 04:17:28,794 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 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 04:17:28,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:17:28,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:28,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:17:28,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 04:17:28,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:28,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-22 04:17:28,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673897180] [2020-12-22 04:17:28,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:17:28,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:28,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:17:28,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:17:28,993 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 10 states. [2020-12-22 04:17:29,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:29,130 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2020-12-22 04:17:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:17:29,131 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-22 04:17:29,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:29,132 INFO L225 Difference]: With dead ends: 89 [2020-12-22 04:17:29,132 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 04:17:29,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:17:29,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 04:17:29,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 44. [2020-12-22 04:17:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:17:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-12-22 04:17:29,140 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 32 [2020-12-22 04:17:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:29,141 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-12-22 04:17:29,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:17:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-12-22 04:17:29,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:17:29,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:29,142 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:29,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:17:29,357 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:29,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:29,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1035725687, now seen corresponding path program 4 times [2020-12-22 04:17:29,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:29,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091484975] [2020-12-22 04:17:29,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-12-22 04:17:29,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091484975] [2020-12-22 04:17:29,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337507114] [2020-12-22 04:17:29,450 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 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 04:17:29,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:17:29,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:29,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:17:29,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-22 04:17:29,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:29,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2020-12-22 04:17:29,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91302595] [2020-12-22 04:17:29,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:17:29,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:29,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:17:29,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:17:29,792 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 9 states. [2020-12-22 04:17:30,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:30,119 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2020-12-22 04:17:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:17:30,120 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-12-22 04:17:30,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:30,121 INFO L225 Difference]: With dead ends: 121 [2020-12-22 04:17:30,121 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 04:17:30,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:17:30,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 04:17:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2020-12-22 04:17:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 04:17:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-12-22 04:17:30,132 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 41 [2020-12-22 04:17:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:30,133 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-12-22 04:17:30,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:17:30,133 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-12-22 04:17:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:17:30,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:30,134 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:30,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:30,350 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:30,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1804700177, now seen corresponding path program 5 times [2020-12-22 04:17:30,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:30,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225083822] [2020-12-22 04:17:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 37 proven. 5 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-22 04:17:30,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225083822] [2020-12-22 04:17:30,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626118715] [2020-12-22 04:17:30,458 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 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 04:17:32,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-22 04:17:32,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:17:32,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 61 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-22 04:17:32,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:32,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2020-12-22 04:17:32,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872631387] [2020-12-22 04:17:32,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:17:32,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:32,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:17:32,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:17:32,496 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 12 states. [2020-12-22 04:17:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:32,600 INFO L93 Difference]: Finished difference Result 121 states and 154 transitions. [2020-12-22 04:17:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:17:32,600 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-12-22 04:17:32,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:32,601 INFO L225 Difference]: With dead ends: 121 [2020-12-22 04:17:32,601 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 04:17:32,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:17:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 04:17:32,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-22 04:17:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 04:17:32,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2020-12-22 04:17:32,614 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 62 [2020-12-22 04:17:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:32,614 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2020-12-22 04:17:32,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:17:32,614 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2020-12-22 04:17:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:17:32,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:32,616 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:32,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:32,832 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:32,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:32,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1706795471, now seen corresponding path program 6 times [2020-12-22 04:17:32,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:32,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017463838] [2020-12-22 04:17:32,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 117 proven. 22 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-12-22 04:17:33,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017463838] [2020-12-22 04:17:33,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813905832] [2020-12-22 04:17:33,044 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 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 04:17:33,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:17:33,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:33,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:17:33,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2020-12-22 04:17:33,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:33,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-22 04:17:33,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065899444] [2020-12-22 04:17:33,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:17:33,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:33,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:17:33,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:17:33,555 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 13 states. [2020-12-22 04:17:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:34,334 INFO L93 Difference]: Finished difference Result 217 states and 275 transitions. [2020-12-22 04:17:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:17:34,334 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-12-22 04:17:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:34,338 INFO L225 Difference]: With dead ends: 217 [2020-12-22 04:17:34,338 INFO L226 Difference]: Without dead ends: 167 [2020-12-22 04:17:34,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:17:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-22 04:17:34,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 95. [2020-12-22 04:17:34,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 04:17:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-12-22 04:17:34,366 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 80 [2020-12-22 04:17:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:34,366 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-12-22 04:17:34,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:17:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-12-22 04:17:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 04:17:34,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:34,372 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:34,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:17:34,587 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:34,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1797449848, now seen corresponding path program 7 times [2020-12-22 04:17:34,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:34,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654160982] [2020-12-22 04:17:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 175 proven. 35 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-12-22 04:17:34,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654160982] [2020-12-22 04:17:34,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698316450] [2020-12-22 04:17:34,756 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 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 04:17:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:34,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:17:34,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 175 proven. 35 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-12-22 04:17:35,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:35,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 04:17:35,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678980623] [2020-12-22 04:17:35,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:17:35,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:35,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:17:35,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:17:35,137 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 16 states. [2020-12-22 04:17:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:35,206 INFO L93 Difference]: Finished difference Result 169 states and 214 transitions. [2020-12-22 04:17:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:17:35,207 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 92 [2020-12-22 04:17:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:35,208 INFO L225 Difference]: With dead ends: 169 [2020-12-22 04:17:35,208 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 04:17:35,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:17:35,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 04:17:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2020-12-22 04:17:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 04:17:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2020-12-22 04:17:35,218 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 92 [2020-12-22 04:17:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:35,219 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2020-12-22 04:17:35,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:17:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2020-12-22 04:17:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 04:17:35,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:35,220 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 5, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:35,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:35,436 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:35,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:35,437 INFO L82 PathProgramCache]: Analyzing trace with hash -475132743, now seen corresponding path program 8 times [2020-12-22 04:17:35,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:35,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94548879] [2020-12-22 04:17:35,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 245 proven. 51 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2020-12-22 04:17:35,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94548879] [2020-12-22 04:17:35,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737117121] [2020-12-22 04:17:35,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:35,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:17:35,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:35,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:17:35,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 245 proven. 51 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2020-12-22 04:17:36,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:36,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-22 04:17:36,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766216282] [2020-12-22 04:17:36,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:17:36,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:36,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:17:36,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:17:36,032 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand 18 states. [2020-12-22 04:17:36,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:36,114 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2020-12-22 04:17:36,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:17:36,114 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-12-22 04:17:36,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:36,115 INFO L225 Difference]: With dead ends: 184 [2020-12-22 04:17:36,116 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 04:17:36,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:17:36,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 04:17:36,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2020-12-22 04:17:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 04:17:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 141 transitions. [2020-12-22 04:17:36,128 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 141 transitions. Word has length 101 [2020-12-22 04:17:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:36,129 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 141 transitions. [2020-12-22 04:17:36,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:17:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 141 transitions. [2020-12-22 04:17:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 04:17:36,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:36,130 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 5, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:36,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:17:36,345 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:36,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:36,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1813320024, now seen corresponding path program 9 times [2020-12-22 04:17:36,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:36,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846212331] [2020-12-22 04:17:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 327 proven. 70 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2020-12-22 04:17:36,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846212331] [2020-12-22 04:17:36,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787920141] [2020-12-22 04:17:36,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:17:36,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 04:17:36,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:36,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:17:36,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 740 trivial. 0 not checked. [2020-12-22 04:17:37,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:37,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2020-12-22 04:17:37,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382531470] [2020-12-22 04:17:37,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:17:37,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:37,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:17:37,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:17:37,056 INFO L87 Difference]: Start difference. First operand 113 states and 141 transitions. Second operand 17 states. [2020-12-22 04:17:38,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:38,651 INFO L93 Difference]: Finished difference Result 324 states and 415 transitions. [2020-12-22 04:17:38,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 04:17:38,652 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 110 [2020-12-22 04:17:38,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:38,653 INFO L225 Difference]: With dead ends: 324 [2020-12-22 04:17:38,653 INFO L226 Difference]: Without dead ends: 253 [2020-12-22 04:17:38,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1216, Invalid=2566, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:17:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-22 04:17:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 125. [2020-12-22 04:17:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 04:17:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 156 transitions. [2020-12-22 04:17:38,669 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 156 transitions. Word has length 110 [2020-12-22 04:17:38,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:38,669 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 156 transitions. [2020-12-22 04:17:38,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:17:38,670 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 156 transitions. [2020-12-22 04:17:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 04:17:38,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:38,671 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:38,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:17:38,886 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:38,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:38,887 INFO L82 PathProgramCache]: Analyzing trace with hash -82961039, now seen corresponding path program 10 times [2020-12-22 04:17:38,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:38,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809078145] [2020-12-22 04:17:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 421 proven. 92 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2020-12-22 04:17:39,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809078145] [2020-12-22 04:17:39,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682649874] [2020-12-22 04:17:39,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:39,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:17:39,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:39,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:17:39,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 73 proven. 425 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-22 04:17:39,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:39,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2020-12-22 04:17:39,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093997003] [2020-12-22 04:17:39,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:17:39,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:39,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:17:39,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:17:39,619 INFO L87 Difference]: Start difference. First operand 125 states and 156 transitions. Second operand 27 states. [2020-12-22 04:17:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:42,566 INFO L93 Difference]: Finished difference Result 397 states and 510 transitions. [2020-12-22 04:17:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-22 04:17:42,567 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-12-22 04:17:42,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:42,571 INFO L225 Difference]: With dead ends: 397 [2020-12-22 04:17:42,571 INFO L226 Difference]: Without dead ends: 317 [2020-12-22 04:17:42,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3227 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1869, Invalid=8433, Unknown=0, NotChecked=0, Total=10302 [2020-12-22 04:17:42,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-12-22 04:17:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 137. [2020-12-22 04:17:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 04:17:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-12-22 04:17:42,590 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 122 [2020-12-22 04:17:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:42,591 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-12-22 04:17:42,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:17:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-12-22 04:17:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 04:17:42,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:42,592 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 6, 6, 6, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:42,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:17:42,807 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:42,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:42,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1088737160, now seen corresponding path program 11 times [2020-12-22 04:17:42,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:42,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824260760] [2020-12-22 04:17:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 527 proven. 117 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2020-12-22 04:17:43,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824260760] [2020-12-22 04:17:43,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542947610] [2020-12-22 04:17:43,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true