/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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:38:38,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:38:38,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:38:38,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:38:38,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:38:38,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:38:38,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:38:38,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:38:38,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:38:38,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:38:38,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:38:38,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:38:38,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:38:38,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:38:38,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:38:38,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:38:38,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:38:38,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:38:38,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:38:38,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:38:38,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:38:38,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:38:38,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:38:38,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:38:38,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:38:38,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:38:38,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:38:38,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:38:38,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:38:38,994 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:38:38,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:38:39,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:38:39,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:38:39,001 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:38:39,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:38:39,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:38:39,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:38:39,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:38:39,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:38:39,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:38:39,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:38:39,005 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:38:39,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:38:39,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:38:39,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:38:39,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:38:39,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:38:39,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:38:39,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:38:39,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:38:39,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:38:39,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:38:39,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:38:39,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:38:39,008 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:38:39,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:38:39,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:38:39,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:38:39,513 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:38:39,514 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:38:39,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 09:38:39,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89ebb7fa5/a629125bfc224a30af27800b7589408d/FLAGfa54b6712 [2020-12-22 09:38:40,716 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:38:40,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 09:38:40,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89ebb7fa5/a629125bfc224a30af27800b7589408d/FLAGfa54b6712 [2020-12-22 09:38:41,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89ebb7fa5/a629125bfc224a30af27800b7589408d [2020-12-22 09:38:41,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:38:41,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:38:41,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:38:41,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:38:41,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:38:41,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:38:41" (1/1) ... [2020-12-22 09:38:41,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e9bf527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:41, skipping insertion in model container [2020-12-22 09:38:41,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:38:41" (1/1) ... [2020-12-22 09:38:41,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:38:41,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:38:41,617 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label07.c[6508,6521] [2020-12-22 09:38:41,645 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label07.c[7107,7120] [2020-12-22 09:38:42,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:38:42,903 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:38:42,971 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label07.c[6508,6521] [2020-12-22 09:38:42,977 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label07.c[7107,7120] [2020-12-22 09:38:43,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:38:43,773 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:38:43,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:43 WrapperNode [2020-12-22 09:38:43,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:38:43,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:38:43,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:38:43,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:38:43,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:43" (1/1) ... [2020-12-22 09:38:43,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:43" (1/1) ... [2020-12-22 09:38:44,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:38:44,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:38:44,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:38:44,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:38:44,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:43" (1/1) ... [2020-12-22 09:38:44,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:43" (1/1) ... [2020-12-22 09:38:44,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:43" (1/1) ... [2020-12-22 09:38:44,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:43" (1/1) ... [2020-12-22 09:38:44,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:43" (1/1) ... [2020-12-22 09:38:44,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:43" (1/1) ... [2020-12-22 09:38:44,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:43" (1/1) ... [2020-12-22 09:38:44,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:38:44,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:38:44,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:38:44,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:38:44,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:43" (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 09:38:45,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:38:45,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:38:45,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:38:45,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:38:50,594 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:38:50,594 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:38:50,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:38:50 BoogieIcfgContainer [2020-12-22 09:38:50,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:38:50,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:38:50,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:38:50,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:38:50,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:38:41" (1/3) ... [2020-12-22 09:38:50,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab0d62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:38:50, skipping insertion in model container [2020-12-22 09:38:50,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:43" (2/3) ... [2020-12-22 09:38:50,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab0d62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:38:50, skipping insertion in model container [2020-12-22 09:38:50,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:38:50" (3/3) ... [2020-12-22 09:38:50,608 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 09:38:50,615 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:38:50,630 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:38:50,651 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:38:50,689 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:38:50,689 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:38:50,689 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:38:50,689 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:38:50,689 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:38:50,690 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:38:50,690 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:38:50,690 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:38:50,727 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states. [2020-12-22 09:38:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 09:38:50,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:50,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:50,738 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:50,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2062784631, now seen corresponding path program 1 times [2020-12-22 09:38:50,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:50,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641421749] [2020-12-22 09:38:50,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:50,984 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 09:38:50,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641421749] [2020-12-22 09:38:50,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:50,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:38:50,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219530620] [2020-12-22 09:38:50,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:50,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:51,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:51,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:51,012 INFO L87 Difference]: Start difference. First operand 879 states. Second operand 3 states. [2020-12-22 09:38:57,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:57,858 INFO L93 Difference]: Finished difference Result 2489 states and 4796 transitions. [2020-12-22 09:38:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:57,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 09:38:57,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:57,912 INFO L225 Difference]: With dead ends: 2489 [2020-12-22 09:38:57,912 INFO L226 Difference]: Without dead ends: 1564 [2020-12-22 09:38:57,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 09:38:57,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2020-12-22 09:38:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1564. [2020-12-22 09:38:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2020-12-22 09:38:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2910 transitions. [2020-12-22 09:38:58,084 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2910 transitions. Word has length 7 [2020-12-22 09:38:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:58,085 INFO L481 AbstractCegarLoop]: Abstraction has 1564 states and 2910 transitions. [2020-12-22 09:38:58,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2910 transitions. [2020-12-22 09:38:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:38:58,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:58,088 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, 1, 1, 1] [2020-12-22 09:38:58,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:38:58,088 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2020-12-22 09:38:58,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:58,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556945637] [2020-12-22 09:38:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:58,251 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 09:38:58,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556945637] [2020-12-22 09:38:58,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:58,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:58,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621128766] [2020-12-22 09:38:58,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:38:58,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:58,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:38:58,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:38:58,257 INFO L87 Difference]: Start difference. First operand 1564 states and 2910 transitions. Second operand 5 states. [2020-12-22 09:38:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:58,378 INFO L93 Difference]: Finished difference Result 1605 states and 2972 transitions. [2020-12-22 09:38:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:38:58,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:38:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:58,392 INFO L225 Difference]: With dead ends: 1605 [2020-12-22 09:38:58,393 INFO L226 Difference]: Without dead ends: 1564 [2020-12-22 09:38:58,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:38:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2020-12-22 09:38:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1564. [2020-12-22 09:38:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2020-12-22 09:38:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2894 transitions. [2020-12-22 09:38:58,462 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2894 transitions. Word has length 26 [2020-12-22 09:38:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:58,463 INFO L481 AbstractCegarLoop]: Abstraction has 1564 states and 2894 transitions. [2020-12-22 09:38:58,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:38:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2894 transitions. [2020-12-22 09:38:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:38:58,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:58,467 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:58,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:38:58,468 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:58,472 INFO L82 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2020-12-22 09:38:58,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:58,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609109148] [2020-12-22 09:38:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:58,633 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 09:38:58,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609109148] [2020-12-22 09:38:58,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:58,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:58,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432183513] [2020-12-22 09:38:58,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:58,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:58,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:58,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:58,637 INFO L87 Difference]: Start difference. First operand 1564 states and 2894 transitions. Second operand 3 states. [2020-12-22 09:38:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:58,698 INFO L93 Difference]: Finished difference Result 1632 states and 3000 transitions. [2020-12-22 09:38:58,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:58,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:38:58,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:58,715 INFO L225 Difference]: With dead ends: 1632 [2020-12-22 09:38:58,716 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:38:58,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 09:38:58,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:38:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1593. [2020-12-22 09:38:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1593 states. [2020-12-22 09:38:58,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2940 transitions. [2020-12-22 09:38:58,787 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2940 transitions. Word has length 41 [2020-12-22 09:38:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:58,789 INFO L481 AbstractCegarLoop]: Abstraction has 1593 states and 2940 transitions. [2020-12-22 09:38:58,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2940 transitions. [2020-12-22 09:38:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:38:58,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:58,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:58,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:38:58,800 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:58,801 INFO L82 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2020-12-22 09:38:58,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:58,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045610232] [2020-12-22 09:38:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:58,892 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 09:38:58,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045610232] [2020-12-22 09:38:58,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:58,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:58,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461088106] [2020-12-22 09:38:58,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:58,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:58,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:58,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:58,895 INFO L87 Difference]: Start difference. First operand 1593 states and 2940 transitions. Second operand 3 states. [2020-12-22 09:38:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:58,947 INFO L93 Difference]: Finished difference Result 1713 states and 3128 transitions. [2020-12-22 09:38:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:58,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:38:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:58,959 INFO L225 Difference]: With dead ends: 1713 [2020-12-22 09:38:58,959 INFO L226 Difference]: Without dead ends: 1647 [2020-12-22 09:38:58,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 09:38:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2020-12-22 09:38:59,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1645. [2020-12-22 09:38:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1645 states. [2020-12-22 09:38:59,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 3021 transitions. [2020-12-22 09:38:59,014 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 3021 transitions. Word has length 41 [2020-12-22 09:38:59,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:59,014 INFO L481 AbstractCegarLoop]: Abstraction has 1645 states and 3021 transitions. [2020-12-22 09:38:59,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 3021 transitions. [2020-12-22 09:38:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:38:59,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:59,020 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:59,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:38:59,021 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:59,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:59,022 INFO L82 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2020-12-22 09:38:59,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:59,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993320259] [2020-12-22 09:38:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:59,145 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 09:38:59,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993320259] [2020-12-22 09:38:59,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:59,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:59,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900643739] [2020-12-22 09:38:59,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:38:59,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:59,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:38:59,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:38:59,147 INFO L87 Difference]: Start difference. First operand 1645 states and 3021 transitions. Second operand 5 states. [2020-12-22 09:38:59,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:59,356 INFO L93 Difference]: Finished difference Result 2353 states and 4131 transitions. [2020-12-22 09:38:59,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:38:59,359 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:38:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:59,374 INFO L225 Difference]: With dead ends: 2353 [2020-12-22 09:38:59,374 INFO L226 Difference]: Without dead ends: 2235 [2020-12-22 09:38:59,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:38:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2020-12-22 09:38:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1761. [2020-12-22 09:38:59,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-12-22 09:38:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 3197 transitions. [2020-12-22 09:38:59,501 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 3197 transitions. Word has length 41 [2020-12-22 09:38:59,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:59,504 INFO L481 AbstractCegarLoop]: Abstraction has 1761 states and 3197 transitions. [2020-12-22 09:38:59,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:38:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 3197 transitions. [2020-12-22 09:38:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:38:59,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:59,505 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:59,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:38:59,506 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:59,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2020-12-22 09:38:59,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:59,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101517508] [2020-12-22 09:38:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:59,624 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 09:38:59,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101517508] [2020-12-22 09:38:59,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:59,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:59,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888250760] [2020-12-22 09:38:59,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:59,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:59,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:59,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:59,627 INFO L87 Difference]: Start difference. First operand 1761 states and 3197 transitions. Second operand 3 states. [2020-12-22 09:38:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:59,704 INFO L93 Difference]: Finished difference Result 2185 states and 3843 transitions. [2020-12-22 09:38:59,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:59,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:38:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:59,718 INFO L225 Difference]: With dead ends: 2185 [2020-12-22 09:38:59,718 INFO L226 Difference]: Without dead ends: 1951 [2020-12-22 09:38:59,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 09:38:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2020-12-22 09:38:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1941. [2020-12-22 09:38:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2020-12-22 09:38:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 3453 transitions. [2020-12-22 09:38:59,799 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 3453 transitions. Word has length 43 [2020-12-22 09:38:59,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:59,800 INFO L481 AbstractCegarLoop]: Abstraction has 1941 states and 3453 transitions. [2020-12-22 09:38:59,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 3453 transitions. [2020-12-22 09:38:59,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:38:59,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:59,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:59,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:38:59,808 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:59,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:59,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2020-12-22 09:38:59,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:59,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684665862] [2020-12-22 09:38:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:59,972 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 09:38:59,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684665862] [2020-12-22 09:38:59,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:59,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:59,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946989552] [2020-12-22 09:38:59,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:38:59,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:59,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:38:59,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:38:59,977 INFO L87 Difference]: Start difference. First operand 1941 states and 3453 transitions. Second operand 5 states. [2020-12-22 09:39:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:00,115 INFO L93 Difference]: Finished difference Result 2357 states and 4071 transitions. [2020-12-22 09:39:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:39:00,116 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:39:00,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:00,128 INFO L225 Difference]: With dead ends: 2357 [2020-12-22 09:39:00,128 INFO L226 Difference]: Without dead ends: 1943 [2020-12-22 09:39:00,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 09:39:00,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2020-12-22 09:39:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1941. [2020-12-22 09:39:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2020-12-22 09:39:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 3445 transitions. [2020-12-22 09:39:00,199 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 3445 transitions. Word has length 43 [2020-12-22 09:39:00,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:00,202 INFO L481 AbstractCegarLoop]: Abstraction has 1941 states and 3445 transitions. [2020-12-22 09:39:00,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:39:00,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 3445 transitions. [2020-12-22 09:39:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:39:00,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:00,204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:00,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:39:00,206 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:00,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:00,206 INFO L82 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2020-12-22 09:39:00,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:00,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704561266] [2020-12-22 09:39:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:00,370 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 09:39:00,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704561266] [2020-12-22 09:39:00,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:00,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:39:00,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893271620] [2020-12-22 09:39:00,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:39:00,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:00,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:39:00,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:39:00,375 INFO L87 Difference]: Start difference. First operand 1941 states and 3445 transitions. Second operand 8 states. [2020-12-22 09:39:00,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:00,658 INFO L93 Difference]: Finished difference Result 2267 states and 3909 transitions. [2020-12-22 09:39:00,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:39:00,659 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-22 09:39:00,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:00,676 INFO L225 Difference]: With dead ends: 2267 [2020-12-22 09:39:00,676 INFO L226 Difference]: Without dead ends: 2265 [2020-12-22 09:39:00,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:39:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2020-12-22 09:39:00,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1965. [2020-12-22 09:39:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1965 states. [2020-12-22 09:39:00,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 3465 transitions. [2020-12-22 09:39:00,760 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 3465 transitions. Word has length 44 [2020-12-22 09:39:00,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:00,760 INFO L481 AbstractCegarLoop]: Abstraction has 1965 states and 3465 transitions. [2020-12-22 09:39:00,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:39:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 3465 transitions. [2020-12-22 09:39:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 09:39:00,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:00,761 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, 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 09:39:00,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:39:00,762 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:00,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:00,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2020-12-22 09:39:00,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:00,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241669662] [2020-12-22 09:39:00,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:00,837 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 09:39:00,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241669662] [2020-12-22 09:39:00,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:00,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:39:00,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834391310] [2020-12-22 09:39:00,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:39:00,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:00,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:39:00,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:39:00,842 INFO L87 Difference]: Start difference. First operand 1965 states and 3465 transitions. Second operand 3 states. [2020-12-22 09:39:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:00,937 INFO L93 Difference]: Finished difference Result 2420 states and 4127 transitions. [2020-12-22 09:39:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:39:00,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-22 09:39:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:00,953 INFO L225 Difference]: With dead ends: 2420 [2020-12-22 09:39:00,953 INFO L226 Difference]: Without dead ends: 2161 [2020-12-22 09:39:00,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 09:39:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2020-12-22 09:39:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 2159. [2020-12-22 09:39:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2020-12-22 09:39:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3735 transitions. [2020-12-22 09:39:01,068 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3735 transitions. Word has length 45 [2020-12-22 09:39:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:01,069 INFO L481 AbstractCegarLoop]: Abstraction has 2159 states and 3735 transitions. [2020-12-22 09:39:01,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:39:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3735 transitions. [2020-12-22 09:39:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:39:01,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:01,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:39:01,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:39:01,072 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:01,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1836022441, now seen corresponding path program 1 times [2020-12-22 09:39:01,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:01,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488391934] [2020-12-22 09:39:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:39:01,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488391934] [2020-12-22 09:39:01,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:01,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:39:01,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863645534] [2020-12-22 09:39:01,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:39:01,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:01,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:39:01,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:39:01,197 INFO L87 Difference]: Start difference. First operand 2159 states and 3735 transitions. Second operand 5 states. [2020-12-22 09:39:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:01,435 INFO L93 Difference]: Finished difference Result 4187 states and 6611 transitions. [2020-12-22 09:39:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:39:01,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:39:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:01,456 INFO L225 Difference]: With dead ends: 4187 [2020-12-22 09:39:01,456 INFO L226 Difference]: Without dead ends: 3557 [2020-12-22 09:39:01,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:39:01,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2020-12-22 09:39:01,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2020-12-22 09:39:01,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2787 states. [2020-12-22 09:39:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4619 transitions. [2020-12-22 09:39:01,598 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4619 transitions. Word has length 63 [2020-12-22 09:39:01,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:01,599 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 4619 transitions. [2020-12-22 09:39:01,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:39:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4619 transitions. [2020-12-22 09:39:01,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:39:01,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:01,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:39:01,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:39:01,601 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:01,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:01,602 INFO L82 PathProgramCache]: Analyzing trace with hash 67239625, now seen corresponding path program 1 times [2020-12-22 09:39:01,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:01,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879064064] [2020-12-22 09:39:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:39:01,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879064064] [2020-12-22 09:39:01,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:01,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:39:01,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998557338] [2020-12-22 09:39:01,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:39:01,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:01,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:39:01,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:39:01,703 INFO L87 Difference]: Start difference. First operand 2787 states and 4619 transitions. Second operand 5 states. [2020-12-22 09:39:02,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:02,004 INFO L93 Difference]: Finished difference Result 4815 states and 7495 transitions. [2020-12-22 09:39:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:39:02,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:39:02,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:02,046 INFO L225 Difference]: With dead ends: 4815 [2020-12-22 09:39:02,046 INFO L226 Difference]: Without dead ends: 4185 [2020-12-22 09:39:02,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:39:02,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2020-12-22 09:39:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2020-12-22 09:39:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3731 states. [2020-12-22 09:39:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5935 transitions. [2020-12-22 09:39:02,333 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5935 transitions. Word has length 63 [2020-12-22 09:39:02,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:02,334 INFO L481 AbstractCegarLoop]: Abstraction has 3731 states and 5935 transitions. [2020-12-22 09:39:02,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:39:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5935 transitions. [2020-12-22 09:39:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:39:02,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:02,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:02,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:39:02,336 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:02,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:02,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2131767521, now seen corresponding path program 1 times [2020-12-22 09:39:02,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:02,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210132236] [2020-12-22 09:39:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:02,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210132236] [2020-12-22 09:39:02,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:02,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:39:02,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893289519] [2020-12-22 09:39:02,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:39:02,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:02,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:39:02,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:39:02,386 INFO L87 Difference]: Start difference. First operand 3731 states and 5935 transitions. Second operand 3 states. [2020-12-22 09:39:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:02,549 INFO L93 Difference]: Finished difference Result 5324 states and 8202 transitions. [2020-12-22 09:39:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:39:02,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:39:02,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:02,559 INFO L225 Difference]: With dead ends: 5324 [2020-12-22 09:39:02,560 INFO L226 Difference]: Without dead ends: 3122 [2020-12-22 09:39:02,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 09:39:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2020-12-22 09:39:02,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 3120. [2020-12-22 09:39:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3120 states. [2020-12-22 09:39:02,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 5075 transitions. [2020-12-22 09:39:02,753 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 5075 transitions. Word has length 65 [2020-12-22 09:39:02,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:02,753 INFO L481 AbstractCegarLoop]: Abstraction has 3120 states and 5075 transitions. [2020-12-22 09:39:02,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:39:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 5075 transitions. [2020-12-22 09:39:02,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:39:02,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:02,756 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:02,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:39:02,756 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1187468114, now seen corresponding path program 1 times [2020-12-22 09:39:02,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:02,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971351161] [2020-12-22 09:39:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:39:02,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971351161] [2020-12-22 09:39:02,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:02,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:39:02,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191623201] [2020-12-22 09:39:02,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:39:02,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:02,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:39:02,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:39:02,869 INFO L87 Difference]: Start difference. First operand 3120 states and 5075 transitions. Second operand 5 states. [2020-12-22 09:39:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:03,177 INFO L93 Difference]: Finished difference Result 4472 states and 6999 transitions. [2020-12-22 09:39:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:39:03,178 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 09:39:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:03,189 INFO L225 Difference]: With dead ends: 4472 [2020-12-22 09:39:03,190 INFO L226 Difference]: Without dead ends: 4022 [2020-12-22 09:39:03,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:39:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2020-12-22 09:39:03,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 3568. [2020-12-22 09:39:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3568 states. [2020-12-22 09:39:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 5707 transitions. [2020-12-22 09:39:03,429 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 5707 transitions. Word has length 65 [2020-12-22 09:39:03,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:03,429 INFO L481 AbstractCegarLoop]: Abstraction has 3568 states and 5707 transitions. [2020-12-22 09:39:03,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:39:03,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 5707 transitions. [2020-12-22 09:39:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:39:03,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:03,438 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:03,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:39:03,438 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:03,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:03,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1662229482, now seen corresponding path program 1 times [2020-12-22 09:39:03,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:03,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327147123] [2020-12-22 09:39:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:03,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327147123] [2020-12-22 09:39:03,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985913521] [2020-12-22 09:39:03,722 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 09:39:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:03,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:39:03,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:39:04,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:39:04,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:39:04,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858762363] [2020-12-22 09:39:04,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:39:04,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:04,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:39:04,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:39:04,260 INFO L87 Difference]: Start difference. First operand 3568 states and 5707 transitions. Second operand 12 states. [2020-12-22 09:39:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:08,121 INFO L93 Difference]: Finished difference Result 12862 states and 18463 transitions. [2020-12-22 09:39:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 09:39:08,122 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-12-22 09:39:08,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:08,150 INFO L225 Difference]: With dead ends: 12862 [2020-12-22 09:39:08,150 INFO L226 Difference]: Without dead ends: 10844 [2020-12-22 09:39:08,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=441, Invalid=1629, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 09:39:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10844 states. [2020-12-22 09:39:09,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10844 to 7580. [2020-12-22 09:39:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7580 states. [2020-12-22 09:39:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7580 states to 7580 states and 10984 transitions. [2020-12-22 09:39:09,070 INFO L78 Accepts]: Start accepts. Automaton has 7580 states and 10984 transitions. Word has length 66 [2020-12-22 09:39:09,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:09,070 INFO L481 AbstractCegarLoop]: Abstraction has 7580 states and 10984 transitions. [2020-12-22 09:39:09,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:39:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7580 states and 10984 transitions. [2020-12-22 09:39:09,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:09,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:09,074 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:09,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 09:39:09,288 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:09,289 INFO L82 PathProgramCache]: Analyzing trace with hash -44763738, now seen corresponding path program 1 times [2020-12-22 09:39:09,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:09,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110051892] [2020-12-22 09:39:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:09,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110051892] [2020-12-22 09:39:09,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832997082] [2020-12-22 09:39:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:39:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:09,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:39:09,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:09,934 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:39:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:10,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:39:10,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:39:10,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877645817] [2020-12-22 09:39:10,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:39:10,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:10,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:39:10,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:39:10,305 INFO L87 Difference]: Start difference. First operand 7580 states and 10984 transitions. Second operand 17 states. [2020-12-22 09:39:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:14,676 INFO L93 Difference]: Finished difference Result 31451 states and 43042 transitions. [2020-12-22 09:39:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:39:14,677 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:39:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:14,737 INFO L225 Difference]: With dead ends: 31451 [2020-12-22 09:39:14,737 INFO L226 Difference]: Without dead ends: 26540 [2020-12-22 09:39:14,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:39:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26540 states. [2020-12-22 09:39:16,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26540 to 15253. [2020-12-22 09:39:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15253 states. [2020-12-22 09:39:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15253 states to 15253 states and 21270 transitions. [2020-12-22 09:39:16,503 INFO L78 Accepts]: Start accepts. Automaton has 15253 states and 21270 transitions. Word has length 67 [2020-12-22 09:39:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:16,503 INFO L481 AbstractCegarLoop]: Abstraction has 15253 states and 21270 transitions. [2020-12-22 09:39:16,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:39:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 15253 states and 21270 transitions. [2020-12-22 09:39:16,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:16,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:16,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:16,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 09:39:16,720 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:16,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2066736808, now seen corresponding path program 1 times [2020-12-22 09:39:16,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:16,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904269303] [2020-12-22 09:39:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:16,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904269303] [2020-12-22 09:39:16,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904165513] [2020-12-22 09:39:16,996 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 09:39:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:17,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:39:17,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:17,422 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:39:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:17,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:39:17,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:39:17,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068484331] [2020-12-22 09:39:17,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:39:17,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:17,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:39:17,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:39:17,818 INFO L87 Difference]: Start difference. First operand 15253 states and 21270 transitions. Second operand 17 states. [2020-12-22 09:39:24,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:24,873 INFO L93 Difference]: Finished difference Result 76692 states and 103926 transitions. [2020-12-22 09:39:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:39:24,874 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:39:24,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:25,034 INFO L225 Difference]: With dead ends: 76692 [2020-12-22 09:39:25,035 INFO L226 Difference]: Without dead ends: 65262 [2020-12-22 09:39:25,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=591, Invalid=1665, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:39:25,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65262 states. [2020-12-22 09:39:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65262 to 33304. [2020-12-22 09:39:28,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33304 states. [2020-12-22 09:39:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33304 states to 33304 states and 45538 transitions. [2020-12-22 09:39:28,604 INFO L78 Accepts]: Start accepts. Automaton has 33304 states and 45538 transitions. Word has length 67 [2020-12-22 09:39:28,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:28,605 INFO L481 AbstractCegarLoop]: Abstraction has 33304 states and 45538 transitions. [2020-12-22 09:39:28,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:39:28,605 INFO L276 IsEmpty]: Start isEmpty. Operand 33304 states and 45538 transitions. [2020-12-22 09:39:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:28,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:28,608 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:28,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:39:28,823 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:28,824 INFO L82 PathProgramCache]: Analyzing trace with hash -848751410, now seen corresponding path program 1 times [2020-12-22 09:39:28,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:28,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966461634] [2020-12-22 09:39:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:28,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966461634] [2020-12-22 09:39:28,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:28,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:39:28,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440070461] [2020-12-22 09:39:28,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:39:28,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:28,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:39:28,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:39:28,885 INFO L87 Difference]: Start difference. First operand 33304 states and 45538 transitions. Second operand 3 states. [2020-12-22 09:39:30,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:30,437 INFO L93 Difference]: Finished difference Result 48522 states and 66147 transitions. [2020-12-22 09:39:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:39:30,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:39:30,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:30,480 INFO L225 Difference]: With dead ends: 48522 [2020-12-22 09:39:30,480 INFO L226 Difference]: Without dead ends: 20010 [2020-12-22 09:39:30,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 09:39:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20010 states. [2020-12-22 09:39:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20010 to 19774. [2020-12-22 09:39:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19774 states. [2020-12-22 09:39:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19774 states to 19774 states and 26700 transitions. [2020-12-22 09:39:32,593 INFO L78 Accepts]: Start accepts. Automaton has 19774 states and 26700 transitions. Word has length 67 [2020-12-22 09:39:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:32,593 INFO L481 AbstractCegarLoop]: Abstraction has 19774 states and 26700 transitions. [2020-12-22 09:39:32,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:39:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 19774 states and 26700 transitions. [2020-12-22 09:39:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:32,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:32,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:32,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:39:32,597 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2096259026, now seen corresponding path program 1 times [2020-12-22 09:39:32,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:32,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497173424] [2020-12-22 09:39:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:32,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497173424] [2020-12-22 09:39:32,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:32,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:39:32,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338555168] [2020-12-22 09:39:32,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:39:32,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:32,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:39:32,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:39:32,652 INFO L87 Difference]: Start difference. First operand 19774 states and 26700 transitions. Second operand 3 states. [2020-12-22 09:39:33,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:33,709 INFO L93 Difference]: Finished difference Result 29676 states and 39831 transitions. [2020-12-22 09:39:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:39:33,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:39:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:33,826 INFO L225 Difference]: With dead ends: 29676 [2020-12-22 09:39:33,826 INFO L226 Difference]: Without dead ends: 13664 [2020-12-22 09:39:33,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 09:39:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13664 states. [2020-12-22 09:39:34,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13664 to 13662. [2020-12-22 09:39:34,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13662 states. [2020-12-22 09:39:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13662 states to 13662 states and 18323 transitions. [2020-12-22 09:39:34,923 INFO L78 Accepts]: Start accepts. Automaton has 13662 states and 18323 transitions. Word has length 67 [2020-12-22 09:39:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:34,923 INFO L481 AbstractCegarLoop]: Abstraction has 13662 states and 18323 transitions. [2020-12-22 09:39:34,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:39:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 13662 states and 18323 transitions. [2020-12-22 09:39:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:34,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:34,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:34,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:39:34,925 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:34,926 INFO L82 PathProgramCache]: Analyzing trace with hash 873869654, now seen corresponding path program 1 times [2020-12-22 09:39:34,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:34,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806668694] [2020-12-22 09:39:34,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:39:35,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806668694] [2020-12-22 09:39:35,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:35,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:39:35,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944214537] [2020-12-22 09:39:35,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:39:35,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:35,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:39:35,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:39:35,006 INFO L87 Difference]: Start difference. First operand 13662 states and 18323 transitions. Second operand 6 states. [2020-12-22 09:39:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:36,011 INFO L93 Difference]: Finished difference Result 23425 states and 30875 transitions. [2020-12-22 09:39:36,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:39:36,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:39:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:36,028 INFO L225 Difference]: With dead ends: 23425 [2020-12-22 09:39:36,028 INFO L226 Difference]: Without dead ends: 11373 [2020-12-22 09:39:36,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:39:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2020-12-22 09:39:37,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 11373. [2020-12-22 09:39:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11373 states. [2020-12-22 09:39:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11373 states to 11373 states and 15204 transitions. [2020-12-22 09:39:37,165 INFO L78 Accepts]: Start accepts. Automaton has 11373 states and 15204 transitions. Word has length 67 [2020-12-22 09:39:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:37,165 INFO L481 AbstractCegarLoop]: Abstraction has 11373 states and 15204 transitions. [2020-12-22 09:39:37,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:39:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 11373 states and 15204 transitions. [2020-12-22 09:39:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:37,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:37,168 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:37,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:39:37,168 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:37,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1198871190, now seen corresponding path program 1 times [2020-12-22 09:39:37,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:37,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433009355] [2020-12-22 09:39:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:39:37,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433009355] [2020-12-22 09:39:37,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:37,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:39:37,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128155422] [2020-12-22 09:39:37,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:39:37,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:37,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:39:37,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:39:37,267 INFO L87 Difference]: Start difference. First operand 11373 states and 15204 transitions. Second operand 6 states. [2020-12-22 09:39:38,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:38,547 INFO L93 Difference]: Finished difference Result 18542 states and 24267 transitions. [2020-12-22 09:39:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:39:38,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:39:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:38,558 INFO L225 Difference]: With dead ends: 18542 [2020-12-22 09:39:38,558 INFO L226 Difference]: Without dead ends: 8813 [2020-12-22 09:39:38,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:39:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8813 states. [2020-12-22 09:39:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8813 to 8813. [2020-12-22 09:39:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8813 states. [2020-12-22 09:39:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8813 states to 8813 states and 11856 transitions. [2020-12-22 09:39:39,285 INFO L78 Accepts]: Start accepts. Automaton has 8813 states and 11856 transitions. Word has length 67 [2020-12-22 09:39:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:39,285 INFO L481 AbstractCegarLoop]: Abstraction has 8813 states and 11856 transitions. [2020-12-22 09:39:39,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:39:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 8813 states and 11856 transitions. [2020-12-22 09:39:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:39,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:39,287 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:39,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:39:39,288 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:39,288 INFO L82 PathProgramCache]: Analyzing trace with hash -49807498, now seen corresponding path program 1 times [2020-12-22 09:39:39,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:39,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907998090] [2020-12-22 09:39:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:39:39,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907998090] [2020-12-22 09:39:39,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:39,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:39:39,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795924016] [2020-12-22 09:39:39,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:39:39,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:39,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:39:39,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:39:39,370 INFO L87 Difference]: Start difference. First operand 8813 states and 11856 transitions. Second operand 6 states. [2020-12-22 09:39:40,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:40,431 INFO L93 Difference]: Finished difference Result 14363 states and 18801 transitions. [2020-12-22 09:39:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:39:40,432 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:39:40,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:40,446 INFO L225 Difference]: With dead ends: 14363 [2020-12-22 09:39:40,447 INFO L226 Difference]: Without dead ends: 7116 [2020-12-22 09:39:40,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:39:40,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7116 states. [2020-12-22 09:39:41,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7116 to 7116. [2020-12-22 09:39:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7116 states. [2020-12-22 09:39:41,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 9710 transitions. [2020-12-22 09:39:41,036 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 9710 transitions. Word has length 67 [2020-12-22 09:39:41,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:41,037 INFO L481 AbstractCegarLoop]: Abstraction has 7116 states and 9710 transitions. [2020-12-22 09:39:41,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:39:41,037 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 9710 transitions. [2020-12-22 09:39:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:39:41,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:41,038 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:41,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:39:41,039 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:41,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:41,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1937529655, now seen corresponding path program 1 times [2020-12-22 09:39:41,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:41,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504761218] [2020-12-22 09:39:41,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:41,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504761218] [2020-12-22 09:39:41,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270755726] [2020-12-22 09:39:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:39:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:41,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 09:39:41,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:42,563 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:39:42,581 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:42,583 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:42,588 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:42,883 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 28 [2020-12-22 09:39:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:43,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:39:43,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-22 09:39:43,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613854242] [2020-12-22 09:39:43,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 09:39:43,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:43,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 09:39:43,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-12-22 09:39:43,098 INFO L87 Difference]: Start difference. First operand 7116 states and 9710 transitions. Second operand 26 states. [2020-12-22 09:39:44,174 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-12-22 09:39:44,469 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-12-22 09:39:44,725 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 09:39:44,974 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:39:45,233 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:39:45,504 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:39:45,791 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-12-22 09:39:46,090 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:39:46,299 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:39:46,478 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:39:46,657 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 09:39:47,179 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-12-22 09:39:47,598 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-22 09:39:47,779 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-12-22 09:39:48,358 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-12-22 09:39:48,639 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:39:49,197 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 09:39:49,904 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-12-22 09:39:50,324 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:39:50,637 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-12-22 09:39:50,869 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-12-22 09:39:51,164 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 09:39:51,396 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:39:51,619 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-12-22 09:39:51,893 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:39:52,070 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 09:39:52,500 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:39:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:54,633 INFO L93 Difference]: Finished difference Result 13247 states and 17403 transitions. [2020-12-22 09:39:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 09:39:54,634 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2020-12-22 09:39:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:54,648 INFO L225 Difference]: With dead ends: 13247 [2020-12-22 09:39:54,649 INFO L226 Difference]: Without dead ends: 10342 [2020-12-22 09:39:54,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1297, Invalid=6359, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 09:39:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10342 states. [2020-12-22 09:39:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10342 to 6278. [2020-12-22 09:39:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2020-12-22 09:39:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 8729 transitions. [2020-12-22 09:39:55,270 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 8729 transitions. Word has length 68 [2020-12-22 09:39:55,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:55,270 INFO L481 AbstractCegarLoop]: Abstraction has 6278 states and 8729 transitions. [2020-12-22 09:39:55,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 09:39:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 8729 transitions. [2020-12-22 09:39:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:39:55,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:55,272 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:55,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:39:55,481 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:55,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:55,482 INFO L82 PathProgramCache]: Analyzing trace with hash 75217277, now seen corresponding path program 1 times [2020-12-22 09:39:55,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:55,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041913880] [2020-12-22 09:39:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:56,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041913880] [2020-12-22 09:39:56,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275103598] [2020-12-22 09:39:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 09:39:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:56,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 09:39:56,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:58,841 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 09:39:58,884 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-12-22 09:39:58,885 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:39:58,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:39:59,574 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44