/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/ldv-regression/test23-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:14:21,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:14:21,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:14:21,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:14:21,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:14:21,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:14:21,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:14:21,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:14:21,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:14:21,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:14:21,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:14:21,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:14:21,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:14:21,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:14:21,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:14:21,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:14:21,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:14:21,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:14:21,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:14:21,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:14:21,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:14:21,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:14:21,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:14:21,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:14:21,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:14:21,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:14:21,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:14:21,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:14:21,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:14:21,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:14:21,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:14:21,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:14:21,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:14:21,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:14:21,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:14:21,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:14:21,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:14:21,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:14:21,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:14:21,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:14:21,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:14:21,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:14:22,022 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:14:22,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:14:22,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:14:22,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:14:22,024 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:14:22,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:14:22,025 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:14:22,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:14:22,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:14:22,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:14:22,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:14:22,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:14:22,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:14:22,027 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:14:22,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:14:22,027 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:14:22,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:14:22,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:14:22,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:14:22,028 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:14:22,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:14:22,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:14:22,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:14:22,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:14:22,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:14:22,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:14:22,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:14:22,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:14:22,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:14:22,031 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:14:22,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:14:22,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:14:22,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:14:22,450 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:14:22,451 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:14:22,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test23-1.c [2020-10-27 01:14:22,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c6ac59c3/6084e85f3b1e4d5eaf6e528f17d138f5/FLAGfc0520d0e [2020-10-27 01:14:23,226 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:14:23,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test23-1.c [2020-10-27 01:14:23,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c6ac59c3/6084e85f3b1e4d5eaf6e528f17d138f5/FLAGfc0520d0e [2020-10-27 01:14:23,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c6ac59c3/6084e85f3b1e4d5eaf6e528f17d138f5 [2020-10-27 01:14:23,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:14:23,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:14:23,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:14:23,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:14:23,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:14:23,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:14:23" (1/1) ... [2020-10-27 01:14:23,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c58454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:23, skipping insertion in model container [2020-10-27 01:14:23,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:14:23" (1/1) ... [2020-10-27 01:14:23,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:14:23,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:14:23,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:14:23,926 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:14:23,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:14:23,968 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:14:23,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:23 WrapperNode [2020-10-27 01:14:23,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:14:23,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:14:23,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:14:23,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:14:23,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:23" (1/1) ... [2020-10-27 01:14:23,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:23" (1/1) ... [2020-10-27 01:14:23,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:23" (1/1) ... [2020-10-27 01:14:23,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:23" (1/1) ... [2020-10-27 01:14:24,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:23" (1/1) ... [2020-10-27 01:14:24,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:23" (1/1) ... [2020-10-27 01:14:24,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:23" (1/1) ... [2020-10-27 01:14:24,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:14:24,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:14:24,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:14:24,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:14:24,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-27 01:14:24,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:14:24,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:14:24,118 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:14:24,118 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-27 01:14:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-10-27 01:14:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-27 01:14:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:14:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:14:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:14:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:14:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:14:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:14:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 01:14:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 01:14:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:14:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-10-27 01:14:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 01:14:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:14:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:14:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:14:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:14:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:14:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:14:24,607 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:14:24,607 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:14:24,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:14:24 BoogieIcfgContainer [2020-10-27 01:14:24,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:14:24,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:14:24,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:14:24,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:14:24,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:14:23" (1/3) ... [2020-10-27 01:14:24,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165db602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:14:24, skipping insertion in model container [2020-10-27 01:14:24,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:23" (2/3) ... [2020-10-27 01:14:24,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165db602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:14:24, skipping insertion in model container [2020-10-27 01:14:24,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:14:24" (3/3) ... [2020-10-27 01:14:24,623 INFO L111 eAbstractionObserver]: Analyzing ICFG test23-1.c [2020-10-27 01:14:24,635 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:14:24,641 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:14:24,656 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:14:24,703 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:14:24,703 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:14:24,703 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:14:24,703 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:14:24,703 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:14:24,704 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:14:24,704 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:14:24,704 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:14:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 01:14:24,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:14:24,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:24,736 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:14:24,737 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:24,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:24,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2067776934, now seen corresponding path program 1 times [2020-10-27 01:14:24,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:24,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255682592] [2020-10-27 01:14:24,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:25,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:25,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:25,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:14:25,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:25,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-27 01:14:25,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 01:14:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:25,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:14:25,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:25,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:25,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:25,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:25,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:25,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:14:25,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:25,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:25,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:25,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:25,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:25,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:25,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:25,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:25,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:25,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:25,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:14:25,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:25,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:25,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:25,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:25,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:25,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:25,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:25,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:14:25,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:25,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:25,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:25,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:25,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:25,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:25,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:25,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:25,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:25,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:25,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:14:25,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:25,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:25,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:25,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:25,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:25,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 01:14:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:25,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:25,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:25,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:25,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:25,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:14:25,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:25,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:25,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:25,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:25,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:25,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255682592] [2020-10-27 01:14:25,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:14:25,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:14:25,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733648728] [2020-10-27 01:14:25,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:14:25,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:25,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:14:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:14:25,545 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-10-27 01:14:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:25,735 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-10-27 01:14:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:14:25,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 01:14:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:25,747 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:14:25,747 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:14:25,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:14:25,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:14:25,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 01:14:25,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:14:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 01:14:25,799 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 31 [2020-10-27 01:14:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:25,800 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 01:14:25,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:14:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 01:14:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:14:25,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:25,803 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:14:25,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:14:25,803 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:25,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:25,804 INFO L82 PathProgramCache]: Analyzing trace with hash -721992407, now seen corresponding path program 1 times [2020-10-27 01:14:25,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:25,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345823269] [2020-10-27 01:14:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:25,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:14:26,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-27 01:14:26,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:14:26,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:26,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:14:26,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:26,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:26,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:14:26,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:26,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:26,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:26,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:26,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:26,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:14:26,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:26,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:26,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:26,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:26,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:26,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:14:26,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:26,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:26,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:26,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:14:26,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:26,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:26,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:26,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:26,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:26,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:26,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 01:14:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:26,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:14:26,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:26,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:26,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:26,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:26,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345823269] [2020-10-27 01:14:26,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:14:26,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:14:26,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811776473] [2020-10-27 01:14:26,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:14:26,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:26,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:14:26,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:14:26,425 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 6 states. [2020-10-27 01:14:26,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:26,622 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-27 01:14:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:14:26,623 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-27 01:14:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:26,624 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:14:26,624 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:14:26,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:14:26,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:14:26,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:14:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:14:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 01:14:26,636 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 32 [2020-10-27 01:14:26,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:26,636 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 01:14:26,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:14:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 01:14:26,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:14:26,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:26,638 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:14:26,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:14:26,638 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:26,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1217317746, now seen corresponding path program 1 times [2020-10-27 01:14:26,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:26,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083273299] [2020-10-27 01:14:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:14:26,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-27 01:14:26,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:14:26,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:26,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:14:26,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:26,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:26,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:14:26,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:26,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:26,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:26,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:27,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:14:27,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:27,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:27,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:27,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:27,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:27,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:27,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 01:14:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:27,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:14:27,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:27,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:27,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083273299] [2020-10-27 01:14:27,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:14:27,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:14:27,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235936515] [2020-10-27 01:14:27,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:14:27,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:27,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:14:27,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:14:27,038 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states. [2020-10-27 01:14:27,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:27,209 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-27 01:14:27,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:14:27,210 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-27 01:14:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:27,211 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:14:27,211 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:14:27,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:14:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:14:27,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 01:14:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:14:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 01:14:27,221 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 34 [2020-10-27 01:14:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:27,222 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 01:14:27,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:14:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 01:14:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:14:27,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:27,223 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-27 01:14:27,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:14:27,224 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:27,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:27,225 INFO L82 PathProgramCache]: Analyzing trace with hash -483598669, now seen corresponding path program 2 times [2020-10-27 01:14:27,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:27,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454874847] [2020-10-27 01:14:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:14:27,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-27 01:14:27,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:14:27,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:27,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:14:27,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:27,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:14:27,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:27,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:27,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:27,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:27,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:27,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:14:27,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:27,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:27,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:14:27,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-27 01:14:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:27,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:14:27,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:27,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:27,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454874847] [2020-10-27 01:14:27,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:14:27,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:14:27,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295282255] [2020-10-27 01:14:27,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:14:27,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:27,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:14:27,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:14:27,800 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 8 states. [2020-10-27 01:14:28,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:28,021 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-27 01:14:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:14:28,022 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-27 01:14:28,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:28,023 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:14:28,023 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:14:28,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:14:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:14:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 01:14:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:14:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-27 01:14:28,040 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 36 [2020-10-27 01:14:28,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:28,041 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-27 01:14:28,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:14:28,042 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-27 01:14:28,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:14:28,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:28,044 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:14:28,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:14:28,045 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:28,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash 245797784, now seen corresponding path program 3 times [2020-10-27 01:14:28,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:28,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14863925] [2020-10-27 01:14:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:28,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:28,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:28,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:14:28,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:28,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-27 01:14:28,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:28,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:14:28,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:28,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:14:28,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:28,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:28,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:28,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:28,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:28,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:28,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:14:28,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:28,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:28,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:28,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:28,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:28,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:28,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:28,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:28,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:28,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:28,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:14:28,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:28,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:28,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:28,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:28,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:28,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:28,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:28,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:28,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:28,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:28,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:28,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:28,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:28,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:28,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:28,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:28,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:28,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:28,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:28,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:28,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:28,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:28,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:28,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:28,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:28,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:28,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:28,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 01:14:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:28,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:28,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:28,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:28,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:28,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:14:28,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:28,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:28,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:28,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:28,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:28,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14863925] [2020-10-27 01:14:28,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:14:28,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:14:28,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211457978] [2020-10-27 01:14:28,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:14:28,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:28,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:14:28,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:14:28,520 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 9 states. [2020-10-27 01:14:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:28,758 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-27 01:14:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:14:28,759 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-27 01:14:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:28,762 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:14:28,762 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:14:28,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:14:28,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:14:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 01:14:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:14:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-27 01:14:28,772 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 38 [2020-10-27 01:14:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:28,776 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-27 01:14:28,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:14:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-27 01:14:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:14:28,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:28,780 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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] [2020-10-27 01:14:28,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:14:28,780 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1116119869, now seen corresponding path program 4 times [2020-10-27 01:14:28,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:28,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144555934] [2020-10-27 01:14:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:28,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:29,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:29,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:14:29,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:29,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-27 01:14:29,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:14:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:14:29,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:29,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:29,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:29,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:29,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:29,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:29,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:14:29,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:29,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:29,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:29,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:29,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:29,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:29,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:29,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:29,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:29,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:29,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:29,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:29,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:29,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:29,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:29,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:29,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:29,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:29,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:29,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:29,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:29,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:29,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:29,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:29,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:29,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:29,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:29,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:29,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:29,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:29,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:29,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:29,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:29,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:29,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:29,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:29,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:29,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:29,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 01:14:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:29,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:29,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:29,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:29,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:29,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:29,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:29,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:29,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:29,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:29,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:29,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144555934] [2020-10-27 01:14:29,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:14:29,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:14:29,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136286877] [2020-10-27 01:14:29,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:14:29,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:29,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:14:29,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:14:29,224 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 10 states. [2020-10-27 01:14:29,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:29,530 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-27 01:14:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:14:29,531 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-27 01:14:29,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:29,532 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:14:29,532 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:14:29,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:14:29,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:14:29,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 01:14:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:14:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 01:14:29,546 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 40 [2020-10-27 01:14:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:29,547 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 01:14:29,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:14:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 01:14:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:14:29,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:29,548 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 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] [2020-10-27 01:14:29,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:14:29,548 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:29,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:29,549 INFO L82 PathProgramCache]: Analyzing trace with hash -22979166, now seen corresponding path program 5 times [2020-10-27 01:14:29,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:29,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893519252] [2020-10-27 01:14:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:29,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:29,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:29,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:14:29,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:29,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-27 01:14:29,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:14:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:14:29,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:30,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:30,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:30,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:30,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:30,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:30,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:14:30,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:30,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:30,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:30,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:30,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:30,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:30,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:30,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:30,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:30,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:30,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:30,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:30,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:30,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:30,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:30,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:30,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:30,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:30,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:30,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:30,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:30,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:30,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:30,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:30,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:30,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:30,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:30,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:30,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:30,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:30,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:30,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:30,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:30,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:30,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 01:14:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:30,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:30,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:30,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:30,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:30,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:30,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:30,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:30,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:30,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:30,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:30,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893519252] [2020-10-27 01:14:30,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:14:30,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:14:30,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684074688] [2020-10-27 01:14:30,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:14:30,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:30,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:14:30,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:14:30,186 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-10-27 01:14:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:30,485 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-27 01:14:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:14:30,486 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-27 01:14:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:30,487 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:14:30,487 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:14:30,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:14:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:14:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 01:14:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:14:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-27 01:14:30,496 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 42 [2020-10-27 01:14:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:30,496 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-27 01:14:30,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:14:30,497 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-27 01:14:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:14:30,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:30,498 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 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] [2020-10-27 01:14:30,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:14:30,498 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash 519508679, now seen corresponding path program 6 times [2020-10-27 01:14:30,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:30,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159282900] [2020-10-27 01:14:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:30,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:30,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:30,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:14:30,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:30,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-27 01:14:30,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:30,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:14:30,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:30,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:14:30,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:31,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:31,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:31,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:31,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:31,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:31,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:14:31,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:31,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:31,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:31,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:31,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:31,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:31,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:31,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:31,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:31,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:31,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:31,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:31,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:31,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:31,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:31,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:31,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:31,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:31,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:31,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:31,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:31,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:31,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:31,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:31,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:31,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:31,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:31,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:31,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:31,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:31,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:31,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:31,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:31,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:31,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:31,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:31,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:31,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:31,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 01:14:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:31,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:31,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:31,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:31,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:31,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:31,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:31,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:31,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:31,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:31,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:31,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159282900] [2020-10-27 01:14:31,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:14:31,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:14:31,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232245950] [2020-10-27 01:14:31,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:14:31,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:31,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:14:31,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:14:31,096 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 12 states. [2020-10-27 01:14:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:31,457 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-27 01:14:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:14:31,458 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-27 01:14:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:31,459 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:14:31,459 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:14:31,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:14:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:14:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 01:14:31,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:14:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 01:14:31,468 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 44 [2020-10-27 01:14:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:31,468 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 01:14:31,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:14:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 01:14:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:14:31,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:31,470 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 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] [2020-10-27 01:14:31,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:14:31,470 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:31,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:31,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2135682388, now seen corresponding path program 7 times [2020-10-27 01:14:31,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:31,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327584888] [2020-10-27 01:14:31,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:31,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:31,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:31,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:14:31,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:31,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-27 01:14:31,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:14:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:14:31,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:32,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:32,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:32,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:32,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:32,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:32,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:14:32,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:32,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:32,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:32,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:32,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:32,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:32,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:32,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:32,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:32,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:32,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:32,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:32,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:32,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:32,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:32,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:32,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:32,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:32,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:32,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:32,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:32,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:32,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:32,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:32,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:32,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:32,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:32,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:32,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:32,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:32,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:32,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:32,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:32,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:32,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:32,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:32,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 01:14:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:32,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:32,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:32,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:32,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:32,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:32,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:32,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:32,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:32,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:32,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:32,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327584888] [2020-10-27 01:14:32,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:14:32,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:14:32,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437656259] [2020-10-27 01:14:32,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:14:32,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:32,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:14:32,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:14:32,086 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 13 states. [2020-10-27 01:14:32,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:32,435 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-27 01:14:32,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:14:32,436 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-27 01:14:32,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:32,437 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:14:32,437 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:14:32,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:14:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:14:32,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 01:14:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:14:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-27 01:14:32,444 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 46 [2020-10-27 01:14:32,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:32,444 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-27 01:14:32,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:14:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-27 01:14:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:14:32,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:32,446 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 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] [2020-10-27 01:14:32,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:14:32,446 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:32,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1731243345, now seen corresponding path program 8 times [2020-10-27 01:14:32,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:32,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33015652] [2020-10-27 01:14:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:32,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:32,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:32,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:14:32,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:32,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-27 01:14:32,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:32,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:14:32,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:32,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:14:32,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:33,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:33,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:33,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:33,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:33,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:33,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:14:33,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:33,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:33,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:33,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:33,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:33,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:33,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:33,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:33,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:33,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:33,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:33,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:33,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:33,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:33,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:33,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:33,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:33,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:33,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:33,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:33,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:33,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:33,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:33,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:33,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:33,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:33,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:33,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:33,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:33,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:33,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:33,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:33,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:33,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:33,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:33,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:33,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:33,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:33,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 01:14:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:33,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:33,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:33,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:33,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:33,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:14:33,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:33,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:33,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:33,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:33,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:33,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33015652] [2020-10-27 01:14:33,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:14:33,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:14:33,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539875161] [2020-10-27 01:14:33,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:14:33,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:33,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:14:33,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:14:33,135 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 14 states. [2020-10-27 01:14:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:33,625 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-27 01:14:33,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:14:33,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-27 01:14:33,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:33,627 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:14:33,627 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:14:33,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:14:33,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:14:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 01:14:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:14:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-27 01:14:33,640 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 48 [2020-10-27 01:14:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:33,641 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-27 01:14:33,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:14:33,641 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-27 01:14:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:14:33,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:33,643 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 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] [2020-10-27 01:14:33,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:14:33,644 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:33,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1594805578, now seen corresponding path program 9 times [2020-10-27 01:14:33,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:33,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857396095] [2020-10-27 01:14:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:33,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:34,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:34,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:14:34,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:34,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-27 01:14:34,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:34,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:14:34,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:34,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:14:34,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:34,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:34,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:34,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:34,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:34,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:34,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:14:34,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:34,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:34,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:34,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:34,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:34,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:34,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:34,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:34,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:34,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:34,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:34,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:34,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:34,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:34,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:34,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:34,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:34,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:34,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:34,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:34,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:34,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:34,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:34,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:34,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:34,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:34,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:34,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:34,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:34,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:34,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:34,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:34,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 01:14:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:34,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:34,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:34,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:34,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:34,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:34,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:34,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:34,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:34,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:34,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:34,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857396095] [2020-10-27 01:14:34,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:14:34,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:14:34,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787458066] [2020-10-27 01:14:34,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:14:34,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:34,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:14:34,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:14:34,526 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 15 states. [2020-10-27 01:14:34,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:34,958 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-27 01:14:34,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:14:34,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-27 01:14:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:34,959 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:14:34,959 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:14:34,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:14:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:14:34,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:14:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:14:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-27 01:14:34,966 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 50 [2020-10-27 01:14:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:34,967 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-27 01:14:34,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:14:34,967 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-27 01:14:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:14:34,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:34,968 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 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] [2020-10-27 01:14:34,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:14:34,968 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:34,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1822814939, now seen corresponding path program 10 times [2020-10-27 01:14:34,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:34,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543592817] [2020-10-27 01:14:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:35,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:35,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:36,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:36,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:14:36,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:14:36,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1240 [2020-10-27 01:14:36,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:36,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:14:36,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:36,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:14:36,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:14:36,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:36,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:36,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:36,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:36,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:36,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:14:36,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:36,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:36,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:36,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:36,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:36,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:36,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:36,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:36,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:36,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:36,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:36,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:36,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:36,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:36,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:36,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:36,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:36,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:36,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:36,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:36,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:36,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:36,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:36,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:36,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:36,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:36,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:36,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:36,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:36,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:36,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:36,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:36,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:36,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:36,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:36,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:36,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 01:14:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:36,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:36,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:36,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:36,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:36,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:14:36,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:36,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:36,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:36,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:36,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:36,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543592817] [2020-10-27 01:14:36,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:14:36,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:14:36,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449968904] [2020-10-27 01:14:36,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:14:36,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:36,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:14:36,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:14:36,538 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 16 states. [2020-10-27 01:14:36,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:36,976 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-27 01:14:36,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:14:36,976 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-27 01:14:36,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:36,977 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:14:36,977 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:14:36,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:14:36,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:14:36,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 01:14:36,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:14:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-27 01:14:36,985 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 52 [2020-10-27 01:14:36,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:36,985 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-27 01:14:36,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:14:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-27 01:14:36,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:14:36,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:36,986 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 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] [2020-10-27 01:14:36,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:14:36,986 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:36,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:36,987 INFO L82 PathProgramCache]: Analyzing trace with hash 506150336, now seen corresponding path program 11 times [2020-10-27 01:14:36,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:36,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239522874] [2020-10-27 01:14:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:14:37,010 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:14:37,010 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:14:37,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:14:37,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:14:37 BoogieIcfgContainer [2020-10-27 01:14:37,037 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:14:37,039 INFO L168 Benchmark]: Toolchain (without parser) took 13434.37 ms. Allocated memory was 162.5 MB in the beginning and 282.1 MB in the end (delta: 119.5 MB). Free memory was 138.4 MB in the beginning and 116.4 MB in the end (delta: 22.0 MB). Peak memory consumption was 142.2 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:37,040 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory is still 99.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:14:37,041 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.31 ms. Allocated memory is still 162.5 MB. Free memory was 137.8 MB in the beginning and 127.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:37,041 INFO L168 Benchmark]: Boogie Preprocessor took 47.03 ms. Allocated memory is still 162.5 MB. Free memory was 127.7 MB in the beginning and 126.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:37,042 INFO L168 Benchmark]: RCFGBuilder took 591.17 ms. Allocated memory is still 162.5 MB. Free memory was 126.0 MB in the beginning and 143.7 MB in the end (delta: -17.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:37,043 INFO L168 Benchmark]: TraceAbstraction took 12421.70 ms. Allocated memory was 162.5 MB in the beginning and 282.1 MB in the end (delta: 119.5 MB). Free memory was 143.1 MB in the beginning and 116.4 MB in the end (delta: 26.8 MB). Peak memory consumption was 145.8 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:37,046 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory is still 99.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 354.31 ms. Allocated memory is still 162.5 MB. Free memory was 137.8 MB in the beginning and 127.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.03 ms. Allocated memory is still 162.5 MB. Free memory was 127.7 MB in the beginning and 126.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 591.17 ms. Allocated memory is still 162.5 MB. Free memory was 126.0 MB in the beginning and 143.7 MB in the end (delta: -17.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12421.70 ms. Allocated memory was 162.5 MB in the beginning and 282.1 MB in the end (delta: 119.5 MB). Free memory was 143.1 MB in the beginning and 116.4 MB in the end (delta: 26.8 MB). Peak memory consumption was 145.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] struct dummy d1, d2; [L35] CALL init() [L16] d1.a = __VERIFIER_nondet_int() [L17] d1.b = __VERIFIER_nondet_int() [L19] d2.a = __VERIFIER_nondet_int() [L20] d2.b = __VERIFIER_nondet_int() [L35] RET init() [L36] CALL, EXPR get_dummy() [L25] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] RET, EXPR get_dummy() [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L36] CALL, EXPR get_dummy() [L25] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] RET, EXPR get_dummy() [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L37] int i = __VERIFIER_nondet_int(); [L38] COND TRUE pd1 != 0 && pd1 == pd2 && i >= 0 && i < 10 [L39] pd2->array[i] = i [L40] int *pa = &pd1->array[i]; [L41] EXPR pd2->array[i] [L41] i = pd2->array[i] - 10 [L42] EXPR \read(*pa) [L42] COND TRUE i <= *pa [L43] ++i [L42] EXPR \read(*pa) [L42] COND TRUE i <= *pa [L43] ++i [L42] EXPR \read(*pa) [L42] COND TRUE i <= *pa [L43] ++i [L42] EXPR \read(*pa) [L42] COND TRUE i <= *pa [L43] ++i [L42] EXPR \read(*pa) [L42] COND TRUE i <= *pa [L43] ++i [L42] EXPR \read(*pa) [L42] COND TRUE i <= *pa [L43] ++i [L42] EXPR \read(*pa) [L42] COND TRUE i <= *pa [L43] ++i [L42] EXPR \read(*pa) [L42] COND TRUE i <= *pa [L43] ++i [L42] EXPR \read(*pa) [L42] COND TRUE i <= *pa [L43] ++i [L42] EXPR \read(*pa) [L42] COND TRUE i <= *pa [L43] ++i [L42] EXPR \read(*pa) [L42] COND TRUE i <= *pa [L43] ++i [L42] EXPR \read(*pa) [L42] COND FALSE !(i <= *pa) [L45] CALL, EXPR check(pd2, i) [L30] EXPR s1->array[i] [L30] return s1->array[i] == i; [L45] RET, EXPR check(pd2, i) [L45] COND TRUE !check(pd2, i) [L52] CALL reach_error() [L3] __assert_fail("0", "test23-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.3s, OverallIterations: 13, TraceHistogramMax: 12, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 296 SDtfs, 164 SDslu, 1157 SDs, 0 SdLazy, 1604 SolverSat, 104 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 287 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 547 NumberOfCodeBlocks, 547 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 481 ConstructedInterpolants, 0 QuantifiedInterpolants, 86868 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 48/488 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...