/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/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:08:00,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:08:00,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:08:00,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:08:00,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:08:00,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:08:00,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:08:00,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:08:00,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:08:00,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:08:00,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:08:00,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:08:00,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:08:00,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:08:00,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:08:00,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:08:00,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:08:00,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:08:00,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:08:00,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:08:00,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:08:00,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:08:00,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:08:00,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:08:00,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:08:00,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:08:00,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:08:00,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:08:00,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:08:00,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 17:08:00,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:08:00,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:08:00,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:08:00,965 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 17:08:00,991 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:08:00,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:08:00,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:08:00,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:08:00,994 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:08:00,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:08:00,994 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:08:00,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:08:00,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:08:00,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:08:00,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:08:00,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:08:00,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:08:00,996 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:08:00,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:08:00,996 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:08:00,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:08:00,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:08:00,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:08:00,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:08:00,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:08:00,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:08:00,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:08:00,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:08:00,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:08:00,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:08:00,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:08:00,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:08:00,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:08:00,999 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 17:08:01,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:08:01,511 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:08:01,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:08:01,520 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:08:01,521 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:08:01,522 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-24 17:08:01,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb7be3102/d4003386ebf64ac5a232d19fe348015c/FLAG0f50a3270 [2020-09-24 17:08:02,199 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:08:02,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-24 17:08:02,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb7be3102/d4003386ebf64ac5a232d19fe348015c/FLAG0f50a3270 [2020-09-24 17:08:02,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb7be3102/d4003386ebf64ac5a232d19fe348015c [2020-09-24 17:08:02,537 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:08:02,544 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:08:02,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:08:02,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:08:02,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:08:02,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:08:02" (1/1) ... [2020-09-24 17:08:02,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78523b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:02, skipping insertion in model container [2020-09-24 17:08:02,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:08:02" (1/1) ... [2020-09-24 17:08:02,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:08:02,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:08:02,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:08:02,867 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:08:02,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:08:02,907 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:08:02,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:02 WrapperNode [2020-09-24 17:08:02,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:08:02,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:08:02,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:08:02,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:08:03,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:02" (1/1) ... [2020-09-24 17:08:03,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:02" (1/1) ... [2020-09-24 17:08:03,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:02" (1/1) ... [2020-09-24 17:08:03,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:02" (1/1) ... [2020-09-24 17:08:03,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:02" (1/1) ... [2020-09-24 17:08:03,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:02" (1/1) ... [2020-09-24 17:08:03,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:02" (1/1) ... [2020-09-24 17:08:03,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:08:03,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:08:03,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:08:03,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:08:03,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:02" (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 17:08:03,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:08:03,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:08:03,107 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-24 17:08:03,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:08:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:08:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:08:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 17:08:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 17:08:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:08:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 17:08:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 17:08:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 17:08:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:08:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:08:03,477 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:08:03,477 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 17:08:03,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:08:03 BoogieIcfgContainer [2020-09-24 17:08:03,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:08:03,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:08:03,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:08:03,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:08:03,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:08:02" (1/3) ... [2020-09-24 17:08:03,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a796c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:08:03, skipping insertion in model container [2020-09-24 17:08:03,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:02" (2/3) ... [2020-09-24 17:08:03,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a796c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:08:03, skipping insertion in model container [2020-09-24 17:08:03,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:08:03" (3/3) ... [2020-09-24 17:08:03,495 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-09-24 17:08:03,504 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:08:03,513 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:08:03,535 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:08:03,564 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:08:03,565 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:08:03,565 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:08:03,565 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:08:03,565 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:08:03,565 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:08:03,565 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:08:03,565 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:08:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-09-24 17:08:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 17:08:03,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:03,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:08:03,597 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:03,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:03,603 INFO L82 PathProgramCache]: Analyzing trace with hash 2031307650, now seen corresponding path program 1 times [2020-09-24 17:08:03,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:03,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645393395] [2020-09-24 17:08:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:03,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:03,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:04,010 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:04,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 17:08:04,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:08:04,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-09-24 17:08:04,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:04,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:04,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 17:08:04,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:04,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:04,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:04,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:04,092 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:04,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:04,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:04,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 17:08:04,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:04,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:04,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:04,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:04,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:04,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 17:08:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:04,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:04,124 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:04,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:04,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:04,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 17:08:04,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:04,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:04,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:04,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:04,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:04,141 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 17:08:04,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645393395] [2020-09-24 17:08:04,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:08:04,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:08:04,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935305788] [2020-09-24 17:08:04,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:08:04,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:04,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:08:04,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:08:04,179 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-09-24 17:08:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:04,354 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-09-24 17:08:04,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:08:04,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-24 17:08:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:04,370 INFO L225 Difference]: With dead ends: 102 [2020-09-24 17:08:04,370 INFO L226 Difference]: Without dead ends: 53 [2020-09-24 17:08:04,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:08:04,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-24 17:08:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-24 17:08:04,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-24 17:08:04,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-09-24 17:08:04,424 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2020-09-24 17:08:04,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:04,425 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-09-24 17:08:04,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:08:04,425 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-09-24 17:08:04,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 17:08:04,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:04,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:08:04,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:08:04,428 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:04,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash 897550373, now seen corresponding path program 1 times [2020-09-24 17:08:04,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:04,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008198507] [2020-09-24 17:08:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:04,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:04,574 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:04,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 17:08:04,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:04,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-09-24 17:08:04,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:08:04,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:04,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 17:08:04,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:04,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:04,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:04,621 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:04,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:04,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:04,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:08:04,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:04,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:04,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:04,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-24 17:08:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:04,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:04,645 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:04,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:04,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:04,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 17:08:04,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:04,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:04,655 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 17:08:04,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008198507] [2020-09-24 17:08:04,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:08:04,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:08:04,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795650285] [2020-09-24 17:08:04,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:08:04,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:04,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:08:04,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:08:04,660 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 4 states. [2020-09-24 17:08:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:04,799 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-09-24 17:08:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 17:08:04,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-09-24 17:08:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:04,801 INFO L225 Difference]: With dead ends: 92 [2020-09-24 17:08:04,801 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 17:08:04,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:08:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 17:08:04,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-09-24 17:08:04,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 17:08:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-24 17:08:04,813 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2020-09-24 17:08:04,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:04,814 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-24 17:08:04,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:08:04,814 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-24 17:08:04,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 17:08:04,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:04,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:08:04,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:08:04,816 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1785369867, now seen corresponding path program 1 times [2020-09-24 17:08:04,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:04,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132306391] [2020-09-24 17:08:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:04,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:05,082 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:05,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 17:08:05,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:05,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-09-24 17:08:05,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:05,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:08:05,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 17:08:05,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:05,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:05,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:05,150 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:05,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:05,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:05,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:08:05,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:05,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:05,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 17:08:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:05,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:05,175 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:05,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:05,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:05,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 17:08:05,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:05,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:05,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:05,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:05,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:05,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132306391] [2020-09-24 17:08:05,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:05,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:08:05,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617983356] [2020-09-24 17:08:05,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:08:05,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:05,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:08:05,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:08:05,193 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 6 states. [2020-09-24 17:08:05,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:05,380 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-09-24 17:08:05,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:08:05,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-09-24 17:08:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:05,382 INFO L225 Difference]: With dead ends: 102 [2020-09-24 17:08:05,383 INFO L226 Difference]: Without dead ends: 72 [2020-09-24 17:08:05,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:08:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-24 17:08:05,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-09-24 17:08:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 17:08:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-09-24 17:08:05,393 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 49 [2020-09-24 17:08:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:05,394 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-09-24 17:08:05,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:08:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-09-24 17:08:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 17:08:05,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:05,396 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:08:05,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:08:05,397 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:05,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:05,397 INFO L82 PathProgramCache]: Analyzing trace with hash 862927473, now seen corresponding path program 2 times [2020-09-24 17:08:05,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:05,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558387465] [2020-09-24 17:08:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:05,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:05,712 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:05,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 17:08:05,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:05,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-09-24 17:08:05,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:08:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:05,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 17:08:05,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:08:05,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:05,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:05,823 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:05,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:05,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:05,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:08:05,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:05,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:05,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:05,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 17:08:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:05,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:05,845 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:05,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:05,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:05,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 17:08:05,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:05,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:05,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:05,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:05,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:05,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558387465] [2020-09-24 17:08:05,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:05,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:08:05,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082653738] [2020-09-24 17:08:05,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:08:05,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:05,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:08:05,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:08:05,868 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-09-24 17:08:06,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:06,119 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-09-24 17:08:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 17:08:06,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-09-24 17:08:06,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:06,121 INFO L225 Difference]: With dead ends: 112 [2020-09-24 17:08:06,122 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 17:08:06,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:08:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 17:08:06,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-09-24 17:08:06,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 17:08:06,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-09-24 17:08:06,141 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 59 [2020-09-24 17:08:06,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:06,152 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-09-24 17:08:06,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:08:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-09-24 17:08:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 17:08:06,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:06,157 INFO L422 BasicCegarLoop]: trace histogram [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, 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 17:08:06,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:08:06,157 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:06,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:06,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1103681623, now seen corresponding path program 3 times [2020-09-24 17:08:06,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:06,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547357498] [2020-09-24 17:08:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:06,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:06,591 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:06,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 17:08:06,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:06,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-09-24 17:08:06,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:08:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:06,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 17:08:06,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:06,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:06,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:06,700 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:06,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:06,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:06,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:08:06,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:06,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:06,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:06,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:06,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:06,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-24 17:08:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:06,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:06,716 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:06,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:06,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:06,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:08:06,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:06,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:06,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:06,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:06,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:06,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547357498] [2020-09-24 17:08:06,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:06,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 17:08:06,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363230085] [2020-09-24 17:08:06,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 17:08:06,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:06,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 17:08:06,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:08:06,730 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-09-24 17:08:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:06,937 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-09-24 17:08:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 17:08:06,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-24 17:08:06,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:06,939 INFO L225 Difference]: With dead ends: 122 [2020-09-24 17:08:06,939 INFO L226 Difference]: Without dead ends: 92 [2020-09-24 17:08:06,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:08:06,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-24 17:08:06,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-09-24 17:08:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 17:08:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-09-24 17:08:06,948 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 69 [2020-09-24 17:08:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:06,949 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-09-24 17:08:06,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 17:08:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-09-24 17:08:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 17:08:06,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:06,951 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:06,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:08:06,951 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:06,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:06,952 INFO L82 PathProgramCache]: Analyzing trace with hash -67449155, now seen corresponding path program 4 times [2020-09-24 17:08:06,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:06,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198188098] [2020-09-24 17:08:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:06,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:07,444 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:07,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-24 17:08:07,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:07,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-09-24 17:08:07,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:07,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:08:07,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:07,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 17:08:07,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:07,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:07,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:07,603 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:07,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:07,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:07,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:08:07,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:07,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:07,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:07,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:07,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:07,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 17:08:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:07,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:07,623 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:07,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:07,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:07,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 17:08:07,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:07,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:07,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:07,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:07,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:07,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198188098] [2020-09-24 17:08:07,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:07,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 17:08:07,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708825277] [2020-09-24 17:08:07,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 17:08:07,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:07,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 17:08:07,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:08:07,641 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-09-24 17:08:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:07,940 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-09-24 17:08:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 17:08:07,941 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-09-24 17:08:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:07,944 INFO L225 Difference]: With dead ends: 132 [2020-09-24 17:08:07,948 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 17:08:07,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 17:08:07,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 17:08:07,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-09-24 17:08:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-24 17:08:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-09-24 17:08:07,965 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 79 [2020-09-24 17:08:07,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:07,968 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-09-24 17:08:07,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 17:08:07,968 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-09-24 17:08:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 17:08:07,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:07,970 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:07,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:08:07,971 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:07,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:07,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2083488349, now seen corresponding path program 5 times [2020-09-24 17:08:07,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:07,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226639312] [2020-09-24 17:08:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:08,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:08,618 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:08,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-24 17:08:08,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:08,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-09-24 17:08:08,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:08,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 17:08:08,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:08,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 17:08:08,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:08,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:08,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:08,791 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:08,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:08,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:08,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:08:08,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:08,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:08,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:08,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:08,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:08,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-24 17:08:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:08,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:08,804 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:08,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:08,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:08,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:08:08,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:08,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:08,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:08,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:08,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:08,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226639312] [2020-09-24 17:08:08,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:08,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 17:08:08,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49251253] [2020-09-24 17:08:08,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 17:08:08,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:08,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 17:08:08,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-24 17:08:08,820 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 14 states. [2020-09-24 17:08:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:09,147 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-09-24 17:08:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 17:08:09,148 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-09-24 17:08:09,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:09,150 INFO L225 Difference]: With dead ends: 142 [2020-09-24 17:08:09,152 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 17:08:09,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-24 17:08:09,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 17:08:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-09-24 17:08:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 17:08:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-09-24 17:08:09,174 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 89 [2020-09-24 17:08:09,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:09,174 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-09-24 17:08:09,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 17:08:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-09-24 17:08:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-24 17:08:09,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:09,176 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:09,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:08:09,180 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:09,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1012745481, now seen corresponding path program 6 times [2020-09-24 17:08:09,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:09,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7974004] [2020-09-24 17:08:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:09,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:09,960 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:09,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-24 17:08:09,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:09,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-09-24 17:08:09,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:09,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 17:08:09,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:09,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 17:08:09,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:10,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:10,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:10,174 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:10,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:10,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:10,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:08:10,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:10,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:10,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:10,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:10,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:10,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 17:08:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:10,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:10,192 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:10,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:10,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:10,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:08:10,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:10,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:10,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7974004] [2020-09-24 17:08:10,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:10,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 17:08:10,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983938025] [2020-09-24 17:08:10,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 17:08:10,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:10,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 17:08:10,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:08:10,220 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-09-24 17:08:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:10,727 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-09-24 17:08:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 17:08:10,727 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-09-24 17:08:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:10,729 INFO L225 Difference]: With dead ends: 152 [2020-09-24 17:08:10,729 INFO L226 Difference]: Without dead ends: 122 [2020-09-24 17:08:10,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-24 17:08:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-24 17:08:10,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2020-09-24 17:08:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 17:08:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-09-24 17:08:10,749 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 99 [2020-09-24 17:08:10,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:10,751 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-09-24 17:08:10,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 17:08:10,752 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-09-24 17:08:10,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-24 17:08:10,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:10,756 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:10,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 17:08:10,757 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash -805534481, now seen corresponding path program 7 times [2020-09-24 17:08:10,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:10,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828324806] [2020-09-24 17:08:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:10,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:11,752 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:11,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-24 17:08:11,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:11,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-09-24 17:08:11,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:11,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 17:08:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 17:08:11,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:11,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:11,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:11,981 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:11,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:11,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:11,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:08:11,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:11,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:11,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 17:08:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:11,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:12,000 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:12,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:12,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:12,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 17:08:12,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:12,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:12,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:12,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:12,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:12,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828324806] [2020-09-24 17:08:12,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:12,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 17:08:12,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603496615] [2020-09-24 17:08:12,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 17:08:12,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:12,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 17:08:12,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-24 17:08:12,034 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 18 states. [2020-09-24 17:08:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:12,488 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-09-24 17:08:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 17:08:12,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-09-24 17:08:12,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:12,490 INFO L225 Difference]: With dead ends: 162 [2020-09-24 17:08:12,490 INFO L226 Difference]: Without dead ends: 132 [2020-09-24 17:08:12,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-24 17:08:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-24 17:08:12,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-24 17:08:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-24 17:08:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-09-24 17:08:12,505 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 109 [2020-09-24 17:08:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:12,505 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-09-24 17:08:12,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 17:08:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-09-24 17:08:12,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-24 17:08:12,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:12,507 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:12,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 17:08:12,508 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:12,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1236165291, now seen corresponding path program 8 times [2020-09-24 17:08:12,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:12,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520083800] [2020-09-24 17:08:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:12,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:13,591 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:13,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-09-24 17:08:13,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:13,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-09-24 17:08:13,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:13,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 17:08:13,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:13,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-24 17:08:13,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:13,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:13,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:13,839 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:13,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:13,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:13,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:08:13,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:13,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:13,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:13,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:13,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:13,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 17:08:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:13,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:13,853 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:13,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:13,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:13,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:08:13,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:13,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:13,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:13,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:13,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:13,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520083800] [2020-09-24 17:08:13,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:13,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 17:08:13,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504725510] [2020-09-24 17:08:13,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 17:08:13,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:13,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 17:08:13,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-24 17:08:13,872 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 20 states. [2020-09-24 17:08:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:14,355 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-09-24 17:08:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 17:08:14,356 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-09-24 17:08:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:14,357 INFO L225 Difference]: With dead ends: 172 [2020-09-24 17:08:14,357 INFO L226 Difference]: Without dead ends: 142 [2020-09-24 17:08:14,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 17:08:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-24 17:08:14,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-09-24 17:08:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-24 17:08:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-09-24 17:08:14,364 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 119 [2020-09-24 17:08:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:14,364 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-09-24 17:08:14,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 17:08:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-09-24 17:08:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-24 17:08:14,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:14,366 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:14,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 17:08:14,367 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:14,367 INFO L82 PathProgramCache]: Analyzing trace with hash 977792571, now seen corresponding path program 9 times [2020-09-24 17:08:14,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:14,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61011527] [2020-09-24 17:08:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:14,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:15,706 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:15,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-09-24 17:08:15,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:15,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1313 [2020-09-24 17:08:15,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:15,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 17:08:15,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:15,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 17:08:15,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:16,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:16,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:16,027 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:16,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:16,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:16,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:08:16,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:16,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:16,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:16,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:16,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:16,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-24 17:08:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:16,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:16,039 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:16,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:16,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:16,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:08:16,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:16,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:16,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:16,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:16,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:16,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61011527] [2020-09-24 17:08:16,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:16,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 17:08:16,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131342744] [2020-09-24 17:08:16,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 17:08:16,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:16,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 17:08:16,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-24 17:08:16,062 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-09-24 17:08:16,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:16,647 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-09-24 17:08:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 17:08:16,648 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-09-24 17:08:16,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:16,649 INFO L225 Difference]: With dead ends: 182 [2020-09-24 17:08:16,649 INFO L226 Difference]: Without dead ends: 152 [2020-09-24 17:08:16,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 17:08:16,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-24 17:08:16,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2020-09-24 17:08:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-24 17:08:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-09-24 17:08:16,657 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2020-09-24 17:08:16,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:16,657 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-09-24 17:08:16,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 17:08:16,658 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-09-24 17:08:16,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 17:08:16,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:16,659 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:16,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 17:08:16,660 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:16,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1234849, now seen corresponding path program 10 times [2020-09-24 17:08:16,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:16,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824129316] [2020-09-24 17:08:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:16,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:18,187 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:18,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 17:08:18,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:18,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1502 [2020-09-24 17:08:18,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:18,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 17:08:18,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:18,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-24 17:08:18,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:18,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:18,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:18,524 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:18,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:18,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:18,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:08:18,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:18,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:18,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:18,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:18,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:18,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-24 17:08:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:18,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:18,534 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:18,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:18,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:18,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:08:18,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:18,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:18,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:18,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:18,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:18,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824129316] [2020-09-24 17:08:18,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:18,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 17:08:18,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940775320] [2020-09-24 17:08:18,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 17:08:18,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:18,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 17:08:18,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-24 17:08:18,556 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 24 states. [2020-09-24 17:08:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:19,230 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-09-24 17:08:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 17:08:19,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-09-24 17:08:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:19,233 INFO L225 Difference]: With dead ends: 192 [2020-09-24 17:08:19,233 INFO L226 Difference]: Without dead ends: 162 [2020-09-24 17:08:19,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 17:08:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-24 17:08:19,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-09-24 17:08:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-24 17:08:19,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-09-24 17:08:19,242 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 139 [2020-09-24 17:08:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:19,243 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-09-24 17:08:19,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 17:08:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-09-24 17:08:19,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-24 17:08:19,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:19,244 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:19,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 17:08:19,245 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:19,245 INFO L82 PathProgramCache]: Analyzing trace with hash 187545991, now seen corresponding path program 11 times [2020-09-24 17:08:19,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:19,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418086133] [2020-09-24 17:08:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:19,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:21,057 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:21,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-24 17:08:21,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:21,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1784 [2020-09-24 17:08:21,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:21,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 17:08:21,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:21,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-24 17:08:21,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:21,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:21,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:21,428 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:21,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:21,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:21,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:08:21,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:21,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:21,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:21,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:21,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:21,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-24 17:08:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:21,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:21,440 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:21,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:21,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:21,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:08:21,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:21,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:21,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418086133] [2020-09-24 17:08:21,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:21,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 17:08:21,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238300356] [2020-09-24 17:08:21,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 17:08:21,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:21,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 17:08:21,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-24 17:08:21,488 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 26 states. [2020-09-24 17:08:22,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:22,215 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-09-24 17:08:22,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-24 17:08:22,216 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-09-24 17:08:22,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:22,218 INFO L225 Difference]: With dead ends: 202 [2020-09-24 17:08:22,218 INFO L226 Difference]: Without dead ends: 172 [2020-09-24 17:08:22,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-24 17:08:22,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-24 17:08:22,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-09-24 17:08:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-24 17:08:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-09-24 17:08:22,225 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 149 [2020-09-24 17:08:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:22,226 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-09-24 17:08:22,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 17:08:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-09-24 17:08:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-24 17:08:22,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:22,228 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:22,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 17:08:22,228 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:22,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1146876909, now seen corresponding path program 12 times [2020-09-24 17:08:22,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:22,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167552307] [2020-09-24 17:08:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:22,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:24,268 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:24,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-24 17:08:24,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:24,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2011 [2020-09-24 17:08:24,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:24,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 17:08:24,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:24,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-24 17:08:24,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:24,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:24,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:24,707 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:24,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:24,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:24,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:08:24,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:24,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:24,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:24,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:24,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:24,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-24 17:08:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:24,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:24,722 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:24,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:24,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:24,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:08:24,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:24,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:24,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:24,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:24,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:24,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167552307] [2020-09-24 17:08:24,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:24,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 17:08:24,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381778551] [2020-09-24 17:08:24,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 17:08:24,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:24,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 17:08:24,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-24 17:08:24,775 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 28 states. [2020-09-24 17:08:25,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:25,800 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-09-24 17:08:25,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 17:08:25,801 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-09-24 17:08:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:25,803 INFO L225 Difference]: With dead ends: 212 [2020-09-24 17:08:25,803 INFO L226 Difference]: Without dead ends: 182 [2020-09-24 17:08:25,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 17:08:25,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-24 17:08:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-09-24 17:08:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-24 17:08:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-09-24 17:08:25,815 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2020-09-24 17:08:25,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:25,816 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-09-24 17:08:25,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 17:08:25,816 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-09-24 17:08:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-24 17:08:25,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:25,820 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:25,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 17:08:25,821 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:25,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2141775571, now seen corresponding path program 13 times [2020-09-24 17:08:25,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:25,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328235620] [2020-09-24 17:08:25,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:25,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:28,272 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:28,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-09-24 17:08:28,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:28,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2411 [2020-09-24 17:08:28,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:28,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 17:08:28,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:28,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-09-24 17:08:28,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:28,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:28,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:28,723 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:28,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:28,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:28,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:08:28,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:28,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:28,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:28,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:28,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:28,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-24 17:08:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:28,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:28,737 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:28,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:28,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:28,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:08:28,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:28,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:28,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:28,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:28,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:28,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328235620] [2020-09-24 17:08:28,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:28,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 17:08:28,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061797265] [2020-09-24 17:08:28,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 17:08:28,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 17:08:28,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-24 17:08:28,781 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 30 states. [2020-09-24 17:08:29,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:29,825 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-09-24 17:08:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-24 17:08:29,826 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 169 [2020-09-24 17:08:29,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:29,828 INFO L225 Difference]: With dead ends: 222 [2020-09-24 17:08:29,829 INFO L226 Difference]: Without dead ends: 192 [2020-09-24 17:08:29,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-24 17:08:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-24 17:08:29,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-09-24 17:08:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-24 17:08:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2020-09-24 17:08:29,836 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 169 [2020-09-24 17:08:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:29,837 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2020-09-24 17:08:29,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 17:08:29,837 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2020-09-24 17:08:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-24 17:08:29,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:29,839 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:29,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 17:08:29,839 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:29,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:29,840 INFO L82 PathProgramCache]: Analyzing trace with hash 40366649, now seen corresponding path program 14 times [2020-09-24 17:08:29,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:29,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962278697] [2020-09-24 17:08:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:29,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:32,398 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:32,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-24 17:08:32,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:32,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2528 [2020-09-24 17:08:32,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:32,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 17:08:32,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:32,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-24 17:08:32,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:33,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:33,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:33,010 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:33,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:33,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:33,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:08:33,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:33,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:33,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:33,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:33,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:33,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-24 17:08:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:33,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:33,019 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:33,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:33,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:33,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:08:33,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:33,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:33,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:33,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:33,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:33,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962278697] [2020-09-24 17:08:33,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:33,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-24 17:08:33,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150454635] [2020-09-24 17:08:33,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-24 17:08:33,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:33,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-24 17:08:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-24 17:08:33,042 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 32 states. [2020-09-24 17:08:34,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:34,100 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-09-24 17:08:34,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-24 17:08:34,101 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-09-24 17:08:34,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:34,103 INFO L225 Difference]: With dead ends: 232 [2020-09-24 17:08:34,103 INFO L226 Difference]: Without dead ends: 202 [2020-09-24 17:08:34,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-24 17:08:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-24 17:08:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-09-24 17:08:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-24 17:08:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-09-24 17:08:34,116 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 179 [2020-09-24 17:08:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:34,116 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-09-24 17:08:34,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-24 17:08:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-09-24 17:08:34,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-24 17:08:34,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:34,119 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:34,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 17:08:34,120 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:34,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1993050593, now seen corresponding path program 15 times [2020-09-24 17:08:34,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:34,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746643273] [2020-09-24 17:08:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:34,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:36,887 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:36,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-09-24 17:08:36,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:36,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2733 [2020-09-24 17:08:36,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 17:08:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-09-24 17:08:36,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:37,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:37,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:37,541 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:37,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:37,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:37,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:08:37,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:37,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:37,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:37,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:37,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:37,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-24 17:08:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:37,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:37,548 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:37,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:37,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:37,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:08:37,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:37,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:37,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746643273] [2020-09-24 17:08:37,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:37,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-24 17:08:37,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379104642] [2020-09-24 17:08:37,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-24 17:08:37,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:37,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-24 17:08:37,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 17:08:37,579 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 34 states. [2020-09-24 17:08:38,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:38,748 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-09-24 17:08:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-24 17:08:38,748 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-09-24 17:08:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:38,751 INFO L225 Difference]: With dead ends: 242 [2020-09-24 17:08:38,751 INFO L226 Difference]: Without dead ends: 212 [2020-09-24 17:08:38,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-24 17:08:38,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-24 17:08:38,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-09-24 17:08:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-24 17:08:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-09-24 17:08:38,761 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 189 [2020-09-24 17:08:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:38,761 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-09-24 17:08:38,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-24 17:08:38,762 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-09-24 17:08:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-24 17:08:38,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:38,764 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:38,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 17:08:38,765 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:38,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:38,765 INFO L82 PathProgramCache]: Analyzing trace with hash -839789947, now seen corresponding path program 16 times [2020-09-24 17:08:38,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:38,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039842446] [2020-09-24 17:08:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:38,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:41,640 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:41,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-09-24 17:08:41,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:41,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2841 [2020-09-24 17:08:41,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:41,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 17:08:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-09-24 17:08:41,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:42,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:42,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:42,309 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:42,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:42,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:42,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:08:42,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:42,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:42,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:42,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:42,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:42,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-24 17:08:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:42,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:42,318 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:42,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:42,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:42,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:08:42,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:42,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:42,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039842446] [2020-09-24 17:08:42,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:42,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-24 17:08:42,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501681982] [2020-09-24 17:08:42,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-24 17:08:42,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:42,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-24 17:08:42,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 17:08:42,345 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 36 states. [2020-09-24 17:08:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:43,694 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-09-24 17:08:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-24 17:08:43,695 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 199 [2020-09-24 17:08:43,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:43,696 INFO L225 Difference]: With dead ends: 252 [2020-09-24 17:08:43,697 INFO L226 Difference]: Without dead ends: 222 [2020-09-24 17:08:43,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-24 17:08:43,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-24 17:08:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2020-09-24 17:08:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-24 17:08:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-09-24 17:08:43,721 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 199 [2020-09-24 17:08:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:43,721 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-09-24 17:08:43,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-24 17:08:43,722 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-09-24 17:08:43,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-24 17:08:43,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:43,724 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:43,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 17:08:43,725 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:43,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1916049557, now seen corresponding path program 17 times [2020-09-24 17:08:43,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:43,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29315076] [2020-09-24 17:08:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:43,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:46,831 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:46,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-09-24 17:08:46,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:46,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3068 [2020-09-24 17:08:46,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:46,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 17:08:46,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:46,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-09-24 17:08:46,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:47,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:47,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:47,639 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:47,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:47,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:47,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:08:47,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:47,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:47,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:47,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:47,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:47,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-24 17:08:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:47,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:47,649 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:47,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:08:47,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:47,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:08:47,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:47,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:47,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 17:08:47,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:47,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:47,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29315076] [2020-09-24 17:08:47,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:47,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-24 17:08:47,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706483075] [2020-09-24 17:08:47,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-24 17:08:47,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:47,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-24 17:08:47,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 17:08:47,678 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 38 states. [2020-09-24 17:08:49,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:49,255 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-09-24 17:08:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-24 17:08:49,259 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-09-24 17:08:49,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:49,261 INFO L225 Difference]: With dead ends: 262 [2020-09-24 17:08:49,261 INFO L226 Difference]: Without dead ends: 232 [2020-09-24 17:08:49,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-24 17:08:49,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-24 17:08:49,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-09-24 17:08:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-09-24 17:08:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2020-09-24 17:08:49,270 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 209 [2020-09-24 17:08:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:49,271 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2020-09-24 17:08:49,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-24 17:08:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2020-09-24 17:08:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-09-24 17:08:49,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:49,272 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:08:49,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 17:08:49,273 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:49,273 INFO L82 PathProgramCache]: Analyzing trace with hash 255104209, now seen corresponding path program 18 times [2020-09-24 17:08:49,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:49,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031807062] [2020-09-24 17:08:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:49,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:52,956 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:52,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-09-24 17:08:52,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:52,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3653 [2020-09-24 17:08:52,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 17:08:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:52,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-09-24 17:08:52,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0