/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:01:37,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:01:37,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:01:37,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:01:37,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:01:37,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:01:37,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:01:37,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:01:37,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:01:37,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:01:37,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:01:37,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:01:37,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:01:37,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:01:37,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:01:37,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:01:37,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:01:37,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:01:37,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:01:37,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:01:37,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:01:37,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:01:37,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:01:37,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:01:37,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:01:37,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:01:37,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:01:37,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:01:37,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:01:37,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:01:37,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:01:37,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:01:37,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:01:37,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:01:37,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:01:37,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:01:37,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:01:37,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:01:37,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:01:37,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:01:37,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:01:37,405 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 [2020-09-24 17:01:37,452 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:01:37,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:01:37,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:01:37,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:01:37,455 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:01:37,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:01:37,455 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:01:37,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:01:37,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:01:37,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:01:37,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:01:37,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:01:37,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:01:37,458 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:01:37,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:01:37,458 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:01:37,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:01:37,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:01:37,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:01:37,459 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:01:37,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:01:37,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:01:37,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:01:37,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:01:37,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:01:37,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:01:37,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:01:37,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:01:37,461 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:01:37,461 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:01:37,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:01:37,940 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:01:37,944 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:01:37,946 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:01:37,946 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:01:37,948 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci03.c [2020-09-24 17:01:38,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bef638a39/3fb1cc696b94418fb407432d74782aec/FLAGb846fb0b2 [2020-09-24 17:01:38,537 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:01:38,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Fibonacci03.c [2020-09-24 17:01:38,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bef638a39/3fb1cc696b94418fb407432d74782aec/FLAGb846fb0b2 [2020-09-24 17:01:38,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bef638a39/3fb1cc696b94418fb407432d74782aec [2020-09-24 17:01:38,899 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:01:38,904 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:01:38,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:01:38,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:01:38,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:01:38,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:01:38" (1/1) ... [2020-09-24 17:01:38,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad15a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:38, skipping insertion in model container [2020-09-24 17:01:38,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:01:38" (1/1) ... [2020-09-24 17:01:38,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:01:38,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:01:39,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:01:39,148 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:01:39,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:01:39,179 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:01:39,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:39 WrapperNode [2020-09-24 17:01:39,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:01:39,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:01:39,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:01:39,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:01:39,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:39" (1/1) ... [2020-09-24 17:01:39,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:39" (1/1) ... [2020-09-24 17:01:39,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:39" (1/1) ... [2020-09-24 17:01:39,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:39" (1/1) ... [2020-09-24 17:01:39,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:39" (1/1) ... [2020-09-24 17:01:39,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:39" (1/1) ... [2020-09-24 17:01:39,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:39" (1/1) ... [2020-09-24 17:01:39,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:01:39,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:01:39,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:01:39,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:01:39,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:39" (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 [2020-09-24 17:01:39,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:01:39,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:01:39,361 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-09-24 17:01:39,361 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:01:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:01:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:01:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-09-24 17:01:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:01:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:01:39,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:01:39,576 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:01:39,577 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 17:01:39,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:01:39 BoogieIcfgContainer [2020-09-24 17:01:39,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:01:39,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:01:39,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:01:39,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:01:39,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:01:38" (1/3) ... [2020-09-24 17:01:39,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4eacb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:01:39, skipping insertion in model container [2020-09-24 17:01:39,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:39" (2/3) ... [2020-09-24 17:01:39,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4eacb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:01:39, skipping insertion in model container [2020-09-24 17:01:39,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:01:39" (3/3) ... [2020-09-24 17:01:39,594 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2020-09-24 17:01:39,608 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:01:39,620 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:01:39,664 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:01:39,730 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:01:39,730 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:01:39,730 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:01:39,731 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:01:39,731 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:01:39,731 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:01:39,731 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:01:39,731 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:01:39,752 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-24 17:01:39,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 17:01:39,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:39,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:01:39,761 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:39,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1379859160, now seen corresponding path program 1 times [2020-09-24 17:01:39,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:39,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878125018] [2020-09-24 17:01:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:39,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,011 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:40,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 17:01:40,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:40,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-09-24 17:01:40,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:40,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:40,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:01:40,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 17:01:40,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:01:40,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:40,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,089 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:40,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:40,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:40,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:01:40,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:40,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:40,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:40,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:40,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:40,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:40,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,121 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:40,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:01:40,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:40,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 17:01:40,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:40,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:40,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:40,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:40,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:01:40,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878125018] [2020-09-24 17:01:40,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:01:40,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:01:40,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236442673] [2020-09-24 17:01:40,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:01:40,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:01:40,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:01:40,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:01:40,197 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 5 states. [2020-09-24 17:01:40,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:01:40,333 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-09-24 17:01:40,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:01:40,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-24 17:01:40,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:01:40,349 INFO L225 Difference]: With dead ends: 50 [2020-09-24 17:01:40,350 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 17:01:40,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:01:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 17:01:40,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-24 17:01:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-24 17:01:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-09-24 17:01:40,409 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2020-09-24 17:01:40,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:01:40,409 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-09-24 17:01:40,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:01:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-09-24 17:01:40,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 17:01:40,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:40,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:01:40,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:01:40,413 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:40,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2056866127, now seen corresponding path program 1 times [2020-09-24 17:01:40,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:40,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208579963] [2020-09-24 17:01:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:40,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,510 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:40,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 17:01:40,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:40,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-24 17:01:40,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:40,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:40,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:01:40,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 17:01:40,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:40,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:40,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,554 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:40,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:40,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:40,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:01:40,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:40,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:40,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:40,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:40,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:40,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:40,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,614 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:40,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:01:40,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:40,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 17:01:40,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:40,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:40,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:40,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:01:40,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:01:40,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208579963] [2020-09-24 17:01:40,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:01:40,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:01:40,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371243] [2020-09-24 17:01:40,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:01:40,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:01:40,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:01:40,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:01:40,655 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2020-09-24 17:01:40,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:01:40,730 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-09-24 17:01:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:01:40,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-24 17:01:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:01:40,733 INFO L225 Difference]: With dead ends: 39 [2020-09-24 17:01:40,733 INFO L226 Difference]: Without dead ends: 33 [2020-09-24 17:01:40,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:01:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-24 17:01:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-09-24 17:01:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-24 17:01:40,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-09-24 17:01:40,743 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2020-09-24 17:01:40,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:01:40,744 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-09-24 17:01:40,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:01:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-09-24 17:01:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 17:01:40,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:40,746 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-09-24 17:01:40,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:01:40,747 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:40,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1274124978, now seen corresponding path program 1 times [2020-09-24 17:01:40,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:40,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125969808] [2020-09-24 17:01:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:40,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:40,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,243 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:41,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 17:01:41,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:01:41,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-09-24 17:01:41,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:41,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:01:41,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:01:41,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:01:41,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:41,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:41,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,257 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:41,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:41,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:41,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:01:41,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:41,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:41,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:41,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,318 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:41,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 17:01:41,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:41,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 17:01:41,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:41,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:01:41,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 17:01:41,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:01:41,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:41,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:01:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:41,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,357 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:41,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:01:41,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:41,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:01:41,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:41,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:41,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:01:41,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:01:41,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:41,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 17:01:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:41,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,383 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:41,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:01:41,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:41,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:01:41,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:41,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:41,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 17:01:41,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:41,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:01:41,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125969808] [2020-09-24 17:01:41,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:01:41,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:01:41,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153184971] [2020-09-24 17:01:41,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:01:41,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:01:41,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:01:41,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:01:41,393 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2020-09-24 17:01:41,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:01:41,505 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-09-24 17:01:41,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:01:41,506 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-09-24 17:01:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:01:41,507 INFO L225 Difference]: With dead ends: 55 [2020-09-24 17:01:41,507 INFO L226 Difference]: Without dead ends: 33 [2020-09-24 17:01:41,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:01:41,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-24 17:01:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-24 17:01:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-24 17:01:41,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-24 17:01:41,525 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 36 [2020-09-24 17:01:41,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:01:41,525 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-24 17:01:41,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:01:41,525 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-24 17:01:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 17:01:41,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:41,534 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:01:41,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:01:41,534 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:41,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:41,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2043121517, now seen corresponding path program 1 times [2020-09-24 17:01:41,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:41,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605798198] [2020-09-24 17:01:41,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:41,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:41,978 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:41,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 17:01:41,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:01:41,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-09-24 17:01:41,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:41,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:01:41,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:01:41,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 17:01:41,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:42,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:42,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:42,005 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:42,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:42,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:42,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:01:42,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:42,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:42,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:42,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:42,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:42,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:42,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:42,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:42,329 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:42,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:01:42,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:01:42,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-09-24 17:01:42,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:42,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:01:42,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:42,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 17:01:42,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:42,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:01:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:42,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:42,370 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:42,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:01:42,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:42,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 17:01:42,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:42,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:01:42,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:42,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:42,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:42,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:01:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:42,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:42,392 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:42,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:01:42,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:42,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:01:42,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:42,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:01:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:42,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:01:42,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605798198] [2020-09-24 17:01:42,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:01:42,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:01:42,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964380779] [2020-09-24 17:01:42,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:01:42,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:01:42,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:01:42,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:01:42,416 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-09-24 17:01:42,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:01:42,517 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-09-24 17:01:42,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:01:42,519 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-09-24 17:01:42,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:01:42,520 INFO L225 Difference]: With dead ends: 45 [2020-09-24 17:01:42,521 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 17:01:42,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:01:42,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 17:01:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-09-24 17:01:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-24 17:01:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-09-24 17:01:42,538 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 37 [2020-09-24 17:01:42,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:01:42,538 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-09-24 17:01:42,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:01:42,538 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-09-24 17:01:42,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 17:01:42,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:42,541 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-24 17:01:42,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:01:42,542 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:42,542 INFO L82 PathProgramCache]: Analyzing trace with hash -693972664, now seen corresponding path program 1 times [2020-09-24 17:01:42,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:42,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878922592] [2020-09-24 17:01:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:42,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:42,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:42,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:42,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:43,161 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:43,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-24 17:01:43,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:01:43,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-09-24 17:01:43,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:01:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:01:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 17:01:43,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:43,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:43,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:43,181 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:43,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:43,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:43,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:01:43,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:43,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:43,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:43,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:43,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:43,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:43,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:43,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:43,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:43,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:43,620 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:43,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 17:01:43,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:01:43,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-09-24 17:01:43,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:43,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:01:43,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 17:01:43,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:01:43,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:43,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:01:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:43,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:43,661 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:43,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:01:43,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:43,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 17:01:43,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:43,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:43,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:43,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:01:43,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:43,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:01:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:43,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:43,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:43,727 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:43,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:01:43,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:01:43,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 17:01:43,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:43,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:01:43,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:01:43,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:43,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-24 17:01:43,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878922592] [2020-09-24 17:01:43,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:01:43,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 17:01:43,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451934061] [2020-09-24 17:01:43,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:01:43,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:01:43,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:01:43,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:01:43,757 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2020-09-24 17:01:43,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:01:43,910 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2020-09-24 17:01:43,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:01:43,911 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-09-24 17:01:43,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:01:43,912 INFO L225 Difference]: With dead ends: 78 [2020-09-24 17:01:43,912 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 17:01:43,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:01:43,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 17:01:43,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-09-24 17:01:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 17:01:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-09-24 17:01:43,934 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 38 [2020-09-24 17:01:43,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:01:43,934 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-09-24 17:01:43,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:01:43,935 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-09-24 17:01:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 17:01:43,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:43,940 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:01:43,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:01:43,940 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1275966376, now seen corresponding path program 2 times [2020-09-24 17:01:43,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:43,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083625503] [2020-09-24 17:01:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:43,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:43,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:44,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:46,187 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:46,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-24 17:01:46,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:01:46,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2227 [2020-09-24 17:01:46,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:46,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:01:46,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:01:46,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-24 17:01:46,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:46,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:46,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:46,209 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:46,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:46,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:46,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:01:46,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:46,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:46,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:46,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:46,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:46,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:46,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:46,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:46,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:48,471 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:48,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 17:01:48,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:01:48,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2249 [2020-09-24 17:01:48,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:48,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:01:48,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:48,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 17:01:48,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:48,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:01:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:48,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:48,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:48,771 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:48,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:01:48,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:01:48,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-09-24 17:01:48,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:01:48,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:48,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 17:01:48,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:48,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:01:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:48,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:48,815 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:48,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:01:48,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:48,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:01:48,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:48,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:01:48,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:48,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:48,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:48,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:01:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:48,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:48,835 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:48,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:01:48,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:48,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:01:48,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:48,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:01:48,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:48,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:48,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:48,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 17:01:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:48,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:48,864 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:48,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:01:48,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:48,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:01:48,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:48,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:01:48,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:48,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:01:48,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:01:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-24 17:01:48,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083625503] [2020-09-24 17:01:48,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:01:48,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:01:48,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130762106] [2020-09-24 17:01:48,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:01:48,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:01:48,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:01:48,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:01:48,879 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 8 states. [2020-09-24 17:01:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:01:49,040 INFO L93 Difference]: Finished difference Result 101 states and 136 transitions. [2020-09-24 17:01:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 17:01:49,043 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-09-24 17:01:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:01:49,047 INFO L225 Difference]: With dead ends: 101 [2020-09-24 17:01:49,047 INFO L226 Difference]: Without dead ends: 63 [2020-09-24 17:01:49,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:01:49,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-24 17:01:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2020-09-24 17:01:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 17:01:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2020-09-24 17:01:49,070 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 55 [2020-09-24 17:01:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:01:49,071 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-09-24 17:01:49,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:01:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2020-09-24 17:01:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 17:01:49,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:01:49,077 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:01:49,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:01:49,078 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:01:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:01:49,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1106616419, now seen corresponding path program 3 times [2020-09-24 17:01:49,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:01:49,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650676400] [2020-09-24 17:01:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:01:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:49,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:49,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:49,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:49,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:50,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:50,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:55,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:55,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:57,195 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:57,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-24 17:01:57,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 17:01:57,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8101 [2020-09-24 17:01:57,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:01:57,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:01:57,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 17:01:57,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:57,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:01:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:57,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:57,228 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:01:57,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:01:57,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:01:57,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:01:57,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:01:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:01:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:01:57,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:01:57,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:01:57,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 17:01:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:01:57,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:57,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:57,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:57,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:57,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:58,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:01:58,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:01,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:01,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:02,444 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:02,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-24 17:02:02,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 17:02:02,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5203 [2020-09-24 17:02:02,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:02,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:02:02,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 17:02:02,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-24 17:02:02,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:02,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:02,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:02,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:02,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:02,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:02,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:02,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:05,347 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:05,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 17:02:05,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 17:02:05,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2875 [2020-09-24 17:02:05,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:05,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:02:05,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:05,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 17:02:05,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:05,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:05,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:05,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:05,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:05,592 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:05,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:02:05,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:02:05,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-09-24 17:02:05,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:05,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:02:05,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:05,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 17:02:05,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:05,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:05,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:05,651 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:05,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:05,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:05,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 17:02:05,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:05,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:02:05,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:05,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:02:05,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:05,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:02:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:05,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:05,675 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:05,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:05,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:05,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:02:05,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:05,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:02:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:05,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:05,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 17:02:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:05,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:05,689 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:05,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:05,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:05,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:02:05,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:05,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:02:05,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:05,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:05,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:05,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 17:02:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:05,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:05,708 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:05,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:05,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:05,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 17:02:05,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:05,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:05,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:05,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:05,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 56 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-24 17:02:05,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650676400] [2020-09-24 17:02:05,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:05,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 17:02:05,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402516295] [2020-09-24 17:02:05,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 17:02:05,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:05,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 17:02:05,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:02:05,726 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 9 states. [2020-09-24 17:02:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:05,912 INFO L93 Difference]: Finished difference Result 129 states and 193 transitions. [2020-09-24 17:02:05,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 17:02:05,913 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2020-09-24 17:02:05,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:05,915 INFO L225 Difference]: With dead ends: 129 [2020-09-24 17:02:05,915 INFO L226 Difference]: Without dead ends: 79 [2020-09-24 17:02:05,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-24 17:02:05,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-24 17:02:05,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-09-24 17:02:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-24 17:02:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2020-09-24 17:02:05,929 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 73 [2020-09-24 17:02:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:05,930 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2020-09-24 17:02:05,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 17:02:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2020-09-24 17:02:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-24 17:02:05,932 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:05,932 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:02:05,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:02:05,933 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:05,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:05,933 INFO L82 PathProgramCache]: Analyzing trace with hash -692654002, now seen corresponding path program 4 times [2020-09-24 17:02:05,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:05,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142334698] [2020-09-24 17:02:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:05,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:06,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:06,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:06,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:08,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:08,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:08,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:08,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:08,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:08,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:08,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:09,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:09,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:09,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... 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