/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/simple_built_from_end.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:48:38,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:48:38,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:48:38,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:48:38,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:48:38,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:48:38,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:48:38,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:48:38,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:48:38,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:48:38,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:48:38,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:48:38,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:48:38,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:48:38,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:48:38,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:48:38,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:48:38,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:48:38,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:48:38,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:48:38,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:48:38,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:48:38,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:48:38,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:48:38,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:48:38,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:48:38,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:48:38,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:48:38,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:48:38,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:48:38,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:48:38,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:48:38,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:48:38,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:48:38,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:48:38,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:48:38,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:48:38,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:48:38,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:48:38,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:48:38,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:48:38,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 15:48:38,324 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:48:38,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:48:38,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:48:38,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:48:38,327 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:48:38,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:48:38,328 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:48:38,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:48:38,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:48:38,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:48:38,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:48:38,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:48:38,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:48:38,330 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:48:38,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:48:38,331 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:48:38,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:48:38,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:48:38,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:48:38,331 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:48:38,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:48:38,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:48:38,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:48:38,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:48:38,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:48:38,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:48:38,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:48:38,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:48:38,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:48:38,333 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:48:38,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:48:38,693 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:48:38,697 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:48:38,699 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:48:38,699 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:48:38,700 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple_built_from_end.i [2020-10-12 15:48:38,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea90776c2/c1ea83440f6f4949b2270e6acd6708d6/FLAG59dda48af [2020-10-12 15:48:39,251 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:48:39,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/simple_built_from_end.i [2020-10-12 15:48:39,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea90776c2/c1ea83440f6f4949b2270e6acd6708d6/FLAG59dda48af [2020-10-12 15:48:39,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea90776c2/c1ea83440f6f4949b2270e6acd6708d6 [2020-10-12 15:48:39,595 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:48:39,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:48:39,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:48:39,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:48:39,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:48:39,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:48:39" (1/1) ... [2020-10-12 15:48:39,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c454e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:39, skipping insertion in model container [2020-10-12 15:48:39,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:48:39" (1/1) ... [2020-10-12 15:48:39,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:48:39,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:48:40,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:48:40,204 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:48:40,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:48:40,326 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:48:40,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:40 WrapperNode [2020-10-12 15:48:40,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:48:40,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:48:40,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:48:40,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:48:40,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:40" (1/1) ... [2020-10-12 15:48:40,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:40" (1/1) ... [2020-10-12 15:48:40,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:40" (1/1) ... [2020-10-12 15:48:40,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:40" (1/1) ... [2020-10-12 15:48:40,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:40" (1/1) ... [2020-10-12 15:48:40,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:40" (1/1) ... [2020-10-12 15:48:40,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:40" (1/1) ... [2020-10-12 15:48:40,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:48:40,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:48:40,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:48:40,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:48:40,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:48:40,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:48:40,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:48:40,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:48:40,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:48:40,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-12 15:48:40,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-12 15:48:40,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-12 15:48:40,457 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:48:40,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:48:40,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:48:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:48:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:48:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:48:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:48:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:48:40,459 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:48:40,459 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:48:40,459 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:48:40,460 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:48:40,460 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:48:40,460 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:48:40,460 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:48:40,460 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:48:40,461 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:48:40,461 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:48:40,461 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:48:40,462 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:48:40,462 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:48:40,462 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:48:40,462 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-12 15:48:40,462 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-12 15:48:40,462 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-12 15:48:40,462 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:48:40,463 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:48:40,463 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:48:40,463 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:48:40,463 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:48:40,463 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:48:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:48:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:48:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:48:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:48:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:48:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:48:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:48:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:48:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:48:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:48:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:48:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:48:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:48:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:48:40,471 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:48:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:48:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:48:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:48:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:48:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:48:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:48:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:48:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:48:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:48:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:48:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:48:40,474 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:48:40,474 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:48:40,474 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:48:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:48:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:48:40,476 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:48:40,476 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:48:40,478 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:48:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:48:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:48:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:48:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:48:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:48:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:48:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:48:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:48:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:48:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:48:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:48:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:48:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:48:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:48:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:48:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:48:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:48:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:48:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:48:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:48:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:48:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:48:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:48:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:48:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:48:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:48:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:48:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:48:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:48:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:48:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:48:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:48:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:48:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:48:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:48:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:48:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:48:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:48:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:48:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:48:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:48:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:48:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:48:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:48:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:48:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:48:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:48:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:48:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:48:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:48:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:48:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:48:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:48:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:48:40,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:48:40,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:48:40,801 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:48:40,908 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:48:40,908 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 15:48:40,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:48:40 BoogieIcfgContainer [2020-10-12 15:48:40,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:48:40,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:48:40,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:48:40,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:48:40,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:48:39" (1/3) ... [2020-10-12 15:48:40,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c0ae6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:48:40, skipping insertion in model container [2020-10-12 15:48:40,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:40" (2/3) ... [2020-10-12 15:48:40,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c0ae6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:48:40, skipping insertion in model container [2020-10-12 15:48:40,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:48:40" (3/3) ... [2020-10-12 15:48:40,922 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-10-12 15:48:40,933 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:48:40,941 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:48:40,955 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:48:40,982 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:48:40,982 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:48:40,982 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:48:40,982 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:48:40,982 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:48:40,983 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:48:40,983 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:48:40,983 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:48:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-12 15:48:41,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 15:48:41,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:41,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:41,011 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:41,018 INFO L82 PathProgramCache]: Analyzing trace with hash 442801557, now seen corresponding path program 1 times [2020-10-12 15:48:41,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:41,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427153755] [2020-10-12 15:48:41,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 15:48:41,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:41,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-12 15:48:41,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:48:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:41,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 15:48:41,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 15:48:41,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:41,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:41,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 15:48:41,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:41,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:41,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:41,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:41,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427153755] [2020-10-12 15:48:41,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:48:41,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 15:48:41,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144820816] [2020-10-12 15:48:41,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 15:48:41,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 15:48:41,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:48:41,422 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2020-10-12 15:48:41,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:41,540 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2020-10-12 15:48:41,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:48:41,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-12 15:48:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:41,551 INFO L225 Difference]: With dead ends: 39 [2020-10-12 15:48:41,551 INFO L226 Difference]: Without dead ends: 19 [2020-10-12 15:48:41,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:48:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-12 15:48:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-12 15:48:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 15:48:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-12 15:48:41,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2020-10-12 15:48:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:41,595 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-12 15:48:41,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 15:48:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-12 15:48:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 15:48:41,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:41,597 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:41,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:48:41,597 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:41,598 INFO L82 PathProgramCache]: Analyzing trace with hash -589997544, now seen corresponding path program 1 times [2020-10-12 15:48:41,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:41,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221808597] [2020-10-12 15:48:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:48:41,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:41,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-12 15:48:41,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 15:48:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:48:41,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 15:48:41,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:41,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:41,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:41,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:48:41,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:41,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:41,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:41,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:41,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221808597] [2020-10-12 15:48:41,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:48:41,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 15:48:41,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750673507] [2020-10-12 15:48:41,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 15:48:41,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:41,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 15:48:41,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:48:41,935 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-12 15:48:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:42,003 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-10-12 15:48:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:48:42,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-12 15:48:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:42,004 INFO L225 Difference]: With dead ends: 24 [2020-10-12 15:48:42,005 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 15:48:42,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:48:42,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 15:48:42,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-12 15:48:42,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 15:48:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-12 15:48:42,011 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-10-12 15:48:42,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:42,011 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-12 15:48:42,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 15:48:42,011 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-12 15:48:42,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 15:48:42,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:42,012 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:42,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:48:42,013 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:42,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:42,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1605849708, now seen corresponding path program 1 times [2020-10-12 15:48:42,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:42,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44830775] [2020-10-12 15:48:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:42,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:42,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:42,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:48:42,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:42,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-12 15:48:42,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:42,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:48:42,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:42,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:48:42,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:42,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:42,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:42,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:42,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:42,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:42,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:48:42,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:42,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:42,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:42,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:42,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:42,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44830775] [2020-10-12 15:48:42,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:42,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 15:48:42,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553949825] [2020-10-12 15:48:42,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 15:48:42,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:42,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 15:48:42,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:48:42,181 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-12 15:48:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:42,249 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-12 15:48:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:48:42,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-12 15:48:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:42,250 INFO L225 Difference]: With dead ends: 34 [2020-10-12 15:48:42,251 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 15:48:42,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:48:42,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 15:48:42,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-12 15:48:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 15:48:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-12 15:48:42,257 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2020-10-12 15:48:42,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:42,257 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-12 15:48:42,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 15:48:42,258 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-12 15:48:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:48:42,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:42,259 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:42,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:48:42,259 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:42,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1671651003, now seen corresponding path program 2 times [2020-10-12 15:48:42,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:42,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13099472] [2020-10-12 15:48:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:42,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:42,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:42,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:48:42,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:42,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-12 15:48:42,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:48:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:48:42,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:48:42,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:42,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:42,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:42,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:42,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:42,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:42,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:48:42,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:42,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:42,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:42,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:42,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:42,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13099472] [2020-10-12 15:48:42,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:42,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:48:42,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893104890] [2020-10-12 15:48:42,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:48:42,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:42,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:48:42,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:48:42,547 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2020-10-12 15:48:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:42,764 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-12 15:48:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:48:42,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-12 15:48:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:42,766 INFO L225 Difference]: With dead ends: 31 [2020-10-12 15:48:42,766 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 15:48:42,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:48:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 15:48:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-12 15:48:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 15:48:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-12 15:48:42,773 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-10-12 15:48:42,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:42,773 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-12 15:48:42,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:48:42,773 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-12 15:48:42,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:48:42,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:42,774 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:42,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:48:42,775 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:42,775 INFO L82 PathProgramCache]: Analyzing trace with hash 14041617, now seen corresponding path program 3 times [2020-10-12 15:48:42,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:42,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70732395] [2020-10-12 15:48:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:42,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:43,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:43,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:48:43,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:43,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-12 15:48:43,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:48:43,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:43,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:48:43,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:43,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:43,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:43,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:43,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:43,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:43,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:48:43,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:43,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:43,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 15:48:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:43,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70732395] [2020-10-12 15:48:43,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:43,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:48:43,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658689940] [2020-10-12 15:48:43,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:48:43,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:43,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:48:43,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:48:43,284 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2020-10-12 15:48:43,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:43,461 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-12 15:48:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:48:43,463 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-12 15:48:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:43,465 INFO L225 Difference]: With dead ends: 44 [2020-10-12 15:48:43,465 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 15:48:43,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:48:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 15:48:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-12 15:48:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 15:48:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-12 15:48:43,477 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2020-10-12 15:48:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:43,478 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-12 15:48:43,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:48:43,478 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-12 15:48:43,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:48:43,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:43,480 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:43,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:48:43,481 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:43,481 INFO L82 PathProgramCache]: Analyzing trace with hash 663766794, now seen corresponding path program 4 times [2020-10-12 15:48:43,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:43,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634924667] [2020-10-12 15:48:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:43,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:43,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:43,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:48:43,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:43,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-12 15:48:43,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:43,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:48:43,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:48:43,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:48:43,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:44,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:44,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:44,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:44,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:44,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:44,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:48:44,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:44,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:44,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:44,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:44,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:44,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634924667] [2020-10-12 15:48:44,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:44,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:48:44,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426374356] [2020-10-12 15:48:44,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:48:44,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:44,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:48:44,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:48:44,336 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-10-12 15:48:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:44,970 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-10-12 15:48:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:48:44,971 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-12 15:48:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:44,972 INFO L225 Difference]: With dead ends: 38 [2020-10-12 15:48:44,972 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 15:48:44,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:48:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 15:48:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-12 15:48:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 15:48:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-12 15:48:44,987 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2020-10-12 15:48:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:44,988 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-12 15:48:44,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:48:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-12 15:48:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:48:44,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:44,990 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:44,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:48:44,991 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:44,992 INFO L82 PathProgramCache]: Analyzing trace with hash 251937634, now seen corresponding path program 5 times [2020-10-12 15:48:44,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:44,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925708304] [2020-10-12 15:48:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:45,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:45,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:45,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:48:45,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:45,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-12 15:48:45,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:45,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:48:45,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:45,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:48:45,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:45,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:45,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:45,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:45,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:45,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:45,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:48:45,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:45,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:45,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:45,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:45,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:45,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925708304] [2020-10-12 15:48:45,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:45,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:48:45,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875969181] [2020-10-12 15:48:45,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:48:45,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:45,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:48:45,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:48:45,695 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-10-12 15:48:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:45,920 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-12 15:48:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:48:45,920 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-12 15:48:45,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:45,921 INFO L225 Difference]: With dead ends: 54 [2020-10-12 15:48:45,921 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 15:48:45,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:48:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 15:48:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-12 15:48:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 15:48:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-12 15:48:45,928 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2020-10-12 15:48:45,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:45,929 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-12 15:48:45,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:48:45,929 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-12 15:48:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:48:45,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:45,930 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:45,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:48:45,930 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:45,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1371694153, now seen corresponding path program 6 times [2020-10-12 15:48:45,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:45,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601864006] [2020-10-12 15:48:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:45,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:46,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:46,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:48:46,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:46,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-12 15:48:46,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:46,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:48:46,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:48:46,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:48:46,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:46,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:46,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:46,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:46,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:46,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:46,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:48:46,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:46,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:46,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:46,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:46,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:46,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601864006] [2020-10-12 15:48:46,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:46,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:48:46,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210638991] [2020-10-12 15:48:46,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:48:46,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:46,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:48:46,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:48:46,933 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 15 states. [2020-10-12 15:48:47,631 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-12 15:48:48,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:48,041 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-10-12 15:48:48,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:48:48,041 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-12 15:48:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:48,043 INFO L225 Difference]: With dead ends: 45 [2020-10-12 15:48:48,043 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 15:48:48,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:48:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 15:48:48,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-12 15:48:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 15:48:48,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-12 15:48:48,050 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-10-12 15:48:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:48,051 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-12 15:48:48,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:48:48,051 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-12 15:48:48,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:48:48,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:48,052 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:48,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:48:48,052 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1826466243, now seen corresponding path program 7 times [2020-10-12 15:48:48,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:48,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614189715] [2020-10-12 15:48:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:48,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:48,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:48,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:48:48,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:48,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-12 15:48:48,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:48,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:48:48,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:48,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:48:48,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:49,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:49,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:49,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:49,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:49,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:49,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:49,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:49,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:49,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:49,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:49,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:49,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614189715] [2020-10-12 15:48:49,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:49,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:48:49,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694123332] [2020-10-12 15:48:49,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:48:49,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:49,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:48:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:48:49,115 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 15 states. [2020-10-12 15:48:49,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:49,565 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-12 15:48:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:48:49,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-12 15:48:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:49,567 INFO L225 Difference]: With dead ends: 64 [2020-10-12 15:48:49,567 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:48:49,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:48:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:48:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-12 15:48:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:48:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-12 15:48:49,574 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2020-10-12 15:48:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:49,574 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-12 15:48:49,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:48:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-12 15:48:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:48:49,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:49,575 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:49,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:48:49,576 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:49,576 INFO L82 PathProgramCache]: Analyzing trace with hash 439027452, now seen corresponding path program 8 times [2020-10-12 15:48:49,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:49,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690324489] [2020-10-12 15:48:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:49,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:50,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:50,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:48:50,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:50,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 856 [2020-10-12 15:48:50,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:50,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:48:50,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:48:50,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:48:50,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:51,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:51,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:51,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:51,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:51,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:51,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:48:51,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:51,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:51,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:51,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:51,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690324489] [2020-10-12 15:48:51,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:51,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:48:51,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573070246] [2020-10-12 15:48:51,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:48:51,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:51,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:48:51,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:48:51,168 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 18 states. [2020-10-12 15:48:51,725 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-12 15:48:52,016 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2020-10-12 15:48:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:52,604 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-12 15:48:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:48:52,605 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-12 15:48:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:52,606 INFO L225 Difference]: With dead ends: 52 [2020-10-12 15:48:52,607 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 15:48:52,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:48:52,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 15:48:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-12 15:48:52,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 15:48:52,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-12 15:48:52,614 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2020-10-12 15:48:52,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:52,614 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-12 15:48:52,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:48:52,614 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-12 15:48:52,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:48:52,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:52,615 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:52,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:48:52,616 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:52,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:52,616 INFO L82 PathProgramCache]: Analyzing trace with hash 896214576, now seen corresponding path program 9 times [2020-10-12 15:48:52,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:52,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978425936] [2020-10-12 15:48:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:52,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:53,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:53,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:48:53,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:53,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-12 15:48:53,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:48:53,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:53,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:48:53,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:54,023 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-12 15:48:54,170 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-12 15:48:54,359 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-10-12 15:48:54,625 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 31 [2020-10-12 15:48:54,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:54,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:54,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:54,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:54,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:54,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:54,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:54,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:54,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:54,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:54,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 5 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:54,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978425936] [2020-10-12 15:48:54,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:54,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:48:54,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964604498] [2020-10-12 15:48:54,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:48:54,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:54,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:48:54,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:48:54,953 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-10-12 15:48:55,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:55,517 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-12 15:48:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:48:55,517 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-12 15:48:55,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:55,519 INFO L225 Difference]: With dead ends: 74 [2020-10-12 15:48:55,519 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 15:48:55,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:48:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 15:48:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-12 15:48:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 15:48:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-12 15:48:55,528 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2020-10-12 15:48:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:55,529 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-12 15:48:55,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:48:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-12 15:48:55,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:48:55,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:55,534 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:55,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:48:55,536 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:55,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:55,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1441670871, now seen corresponding path program 10 times [2020-10-12 15:48:55,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:55,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736101646] [2020-10-12 15:48:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:55,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:56,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:56,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:48:56,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:56,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1123 [2020-10-12 15:48:56,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:48:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:48:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:48:56,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:57,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:57,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:57,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:57,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:57,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:57,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:57,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:57,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:57,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:57,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:57,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 20 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:57,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736101646] [2020-10-12 15:48:57,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:57,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:48:57,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325414847] [2020-10-12 15:48:57,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:48:57,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:57,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:48:57,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:48:57,541 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 21 states. [2020-10-12 15:48:58,324 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-12 15:48:58,471 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2020-10-12 15:48:58,665 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2020-10-12 15:48:58,818 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-12 15:48:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:59,545 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-10-12 15:48:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:48:59,545 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-12 15:48:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:59,546 INFO L225 Difference]: With dead ends: 59 [2020-10-12 15:48:59,546 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 15:48:59,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 15:48:59,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 15:48:59,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-12 15:48:59,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 15:48:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-12 15:48:59,554 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2020-10-12 15:48:59,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:59,554 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-12 15:48:59,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:48:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-12 15:48:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:48:59,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:59,555 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:59,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:48:59,556 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:59,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:59,556 INFO L82 PathProgramCache]: Analyzing trace with hash -851233675, now seen corresponding path program 11 times [2020-10-12 15:48:59,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:59,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077135909] [2020-10-12 15:48:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:59,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:01,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:01,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:49:01,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:01,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1427 [2020-10-12 15:49:01,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:01,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:49:01,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:01,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:49:01,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:01,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:01,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:01,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:01,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:01,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:01,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:01,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:01,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:01,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:01,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:01,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 6 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:01,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077135909] [2020-10-12 15:49:01,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:01,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:49:01,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643964768] [2020-10-12 15:49:01,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:49:01,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:01,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:49:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:49:01,914 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 21 states. [2020-10-12 15:49:02,399 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-12 15:49:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:02,663 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-12 15:49:02,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:49:02,663 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-12 15:49:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:02,664 INFO L225 Difference]: With dead ends: 84 [2020-10-12 15:49:02,664 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 15:49:02,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:49:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 15:49:02,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-12 15:49:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:49:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-12 15:49:02,673 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2020-10-12 15:49:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:02,674 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-12 15:49:02,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:49:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-12 15:49:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 15:49:02,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:02,675 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:02,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:49:02,675 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:02,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1732540910, now seen corresponding path program 12 times [2020-10-12 15:49:02,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:02,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381901835] [2020-10-12 15:49:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:02,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:04,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:04,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:49:04,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:04,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1835 [2020-10-12 15:49:04,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:04,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:49:04,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:49:04,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 15:49:04,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:05,108 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-12 15:49:05,326 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-12 15:49:05,623 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-10-12 15:49:06,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:06,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:06,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:06,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:06,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:06,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:06,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:06,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:06,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:06,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:06,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 28 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:06,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381901835] [2020-10-12 15:49:06,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:06,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:49:06,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332123833] [2020-10-12 15:49:06,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:49:06,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:06,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:49:06,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:49:06,268 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 24 states. [2020-10-12 15:49:07,107 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-12 15:49:07,312 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2020-10-12 15:49:07,594 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 85 [2020-10-12 15:49:07,839 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 93 [2020-10-12 15:49:08,171 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 103 [2020-10-12 15:49:08,408 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2020-10-12 15:49:08,614 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2020-10-12 15:49:08,785 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2020-10-12 15:49:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:09,467 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-10-12 15:49:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:49:09,468 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-12 15:49:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:09,469 INFO L225 Difference]: With dead ends: 66 [2020-10-12 15:49:09,469 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 15:49:09,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=577, Invalid=1873, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 15:49:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 15:49:09,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-10-12 15:49:09,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 15:49:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-12 15:49:09,479 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2020-10-12 15:49:09,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:09,479 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-12 15:49:09,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:49:09,480 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-12 15:49:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 15:49:09,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:09,481 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:09,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:49:09,481 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:09,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1509062142, now seen corresponding path program 13 times [2020-10-12 15:49:09,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:09,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645203174] [2020-10-12 15:49:09,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:09,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:11,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:11,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:49:11,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:11,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1827 [2020-10-12 15:49:11,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:11,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:49:11,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:11,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 15:49:11,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:12,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:12,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:12,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:12,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:12,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:12,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:49:12,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:12,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:12,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:12,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:12,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 7 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:12,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645203174] [2020-10-12 15:49:12,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:12,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:49:12,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528370441] [2020-10-12 15:49:12,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:49:12,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:12,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:49:12,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:49:12,446 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 24 states. [2020-10-12 15:49:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:13,402 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-12 15:49:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:49:13,403 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 60 [2020-10-12 15:49:13,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:13,404 INFO L225 Difference]: With dead ends: 94 [2020-10-12 15:49:13,404 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 15:49:13,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:49:13,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 15:49:13,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-10-12 15:49:13,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 15:49:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-12 15:49:13,412 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2020-10-12 15:49:13,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:13,412 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-12 15:49:13,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:49:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-12 15:49:13,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 15:49:13,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:13,413 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:13,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:49:13,414 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:13,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2002241125, now seen corresponding path program 14 times [2020-10-12 15:49:13,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:13,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042814686] [2020-10-12 15:49:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:13,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:16,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:16,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 15:49:16,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:16,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2787 [2020-10-12 15:49:16,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:49:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:49:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 15:49:16,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:17,059 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-12 15:49:17,368 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-10-12 15:49:17,517 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-12 15:49:17,819 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 76 [2020-10-12 15:49:18,073 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2020-10-12 15:49:18,549 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 68 [2020-10-12 15:49:18,829 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2020-10-12 15:49:19,107 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 50 [2020-10-12 15:49:19,327 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2020-10-12 15:49:19,505 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-12 15:49:19,683 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-10-12 15:49:19,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:19,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:19,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:19,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:19,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:19,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:19,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:19,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:19,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:19,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:19,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:49:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 28 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:20,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042814686] [2020-10-12 15:49:20,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:20,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:49:20,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484631624] [2020-10-12 15:49:20,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:49:20,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:20,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:49:20,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:49:20,045 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 27 states. [2020-10-12 15:49:20,922 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-12 15:49:21,135 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2020-10-12 15:49:21,357 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2020-10-12 15:49:21,623 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 89 [2020-10-12 15:49:21,927 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 100 [2020-10-12 15:49:22,206 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 99 [2020-10-12 15:49:22,552 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 110 [2020-10-12 15:49:22,872 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 125 [2020-10-12 15:49:23,315 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 141 [2020-10-12 15:49:23,639 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 127 [2020-10-12 15:49:23,942 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 112 [2020-10-12 15:49:24,203 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 114 [2020-10-12 15:49:24,417 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 93 [2020-10-12 15:49:24,613 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2020-10-12 15:49:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:25,525 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-12 15:49:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 15:49:25,525 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-12 15:49:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:25,526 INFO L225 Difference]: With dead ends: 73 [2020-10-12 15:49:25,527 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 15:49:25,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=725, Invalid=2467, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 15:49:25,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 15:49:25,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-12 15:49:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 15:49:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-12 15:49:25,535 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2020-10-12 15:49:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:25,535 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-12 15:49:25,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:49:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-12 15:49:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 15:49:25,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:25,536 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:25,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:49:25,537 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:25,537 INFO L82 PathProgramCache]: Analyzing trace with hash 264356391, now seen corresponding path program 15 times [2020-10-12 15:49:25,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:25,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378220729] [2020-10-12 15:49:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:25,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:27,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:27,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 15:49:27,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:27,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2401 [2020-10-12 15:49:27,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:27,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:49:27,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:27,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 15:49:27,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:28,903 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-12 15:49:29,059 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-12 15:49:29,414 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-12 15:49:29,672 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-12 15:49:30,040 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 82 [2020-10-12 15:49:30,314 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2020-10-12 15:49:30,640 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 66 [2020-10-12 15:49:30,877 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2020-10-12 15:49:31,103 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2020-10-12 15:49:31,312 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2020-10-12 15:49:31,540 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-10-12 15:49:31,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:31,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:31,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:31,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:31,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:31,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:31,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:31,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 8 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:32,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378220729] [2020-10-12 15:49:32,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:32,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:49:32,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255858571] [2020-10-12 15:49:32,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:49:32,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:32,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:49:32,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:49:32,009 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 27 states. [2020-10-12 15:49:32,612 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-12 15:49:33,055 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 89 [2020-10-12 15:49:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:33,785 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-12 15:49:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:49:33,786 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2020-10-12 15:49:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:33,787 INFO L225 Difference]: With dead ends: 104 [2020-10-12 15:49:33,787 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 15:49:33,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:49:33,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 15:49:33,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-12 15:49:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 15:49:33,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-12 15:49:33,796 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2020-10-12 15:49:33,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:33,796 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-12 15:49:33,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:49:33,797 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-12 15:49:33,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 15:49:33,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:33,797 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:33,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:49:33,798 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:33,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:33,798 INFO L82 PathProgramCache]: Analyzing trace with hash 811302880, now seen corresponding path program 16 times [2020-10-12 15:49:33,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:33,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402684141] [2020-10-12 15:49:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:33,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:37,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:37,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 15:49:37,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:37,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3242 [2020-10-12 15:49:37,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:37,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 15:49:37,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:49:37,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 15:49:37,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:37,988 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-12 15:49:38,379 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-12 15:49:38,534 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-12 15:49:38,800 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-12 15:49:39,010 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 63 [2020-10-12 15:49:39,357 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 83 [2020-10-12 15:49:39,573 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2020-10-12 15:49:39,825 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 69 [2020-10-12 15:49:41,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:41,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:41,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:41,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:41,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:41,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:41,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:41,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:41,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:41,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:41,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 32 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:41,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402684141] [2020-10-12 15:49:41,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:41,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 15:49:41,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382037076] [2020-10-12 15:49:41,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 15:49:41,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:41,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 15:49:41,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:49:41,061 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 30 states. [2020-10-12 15:49:42,105 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-12 15:49:42,305 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-12 15:49:42,616 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 96 [2020-10-12 15:49:42,866 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-12 15:49:43,244 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 111 [2020-10-12 15:49:43,520 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2020-10-12 15:49:43,972 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 123 [2020-10-12 15:49:44,326 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 119 [2020-10-12 15:49:44,878 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 145 [2020-10-12 15:49:45,246 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 121 [2020-10-12 15:49:45,514 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2020-10-12 15:49:45,724 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2020-10-12 15:49:45,891 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-12 15:49:46,062 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-12 15:49:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:47,172 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-10-12 15:49:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 15:49:47,172 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 71 [2020-10-12 15:49:47,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:47,174 INFO L225 Difference]: With dead ends: 80 [2020-10-12 15:49:47,174 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 15:49:47,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=827, Invalid=3205, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 15:49:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 15:49:47,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-10-12 15:49:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 15:49:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-12 15:49:47,184 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2020-10-12 15:49:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:47,185 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-12 15:49:47,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 15:49:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-12 15:49:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 15:49:47,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:47,186 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:47,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:49:47,186 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:47,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1747931852, now seen corresponding path program 17 times [2020-10-12 15:49:47,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:47,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856878415] [2020-10-12 15:49:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:47,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:50,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:50,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 15:49:50,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:50,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2754 [2020-10-12 15:49:50,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 15:49:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 15:49:50,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:50,899 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-12 15:49:51,059 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-12 15:49:51,312 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-12 15:49:51,489 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-12 15:49:51,791 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 84 [2020-10-12 15:49:52,052 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-12 15:49:52,321 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2020-10-12 15:49:53,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:53,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:53,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:53,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:53,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:53,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:53,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:53,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:53,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:53,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:53,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 9 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:53,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856878415] [2020-10-12 15:49:53,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:53,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 15:49:53,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497309284] [2020-10-12 15:49:53,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 15:49:53,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:53,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 15:49:53,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:49:53,373 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 30 states. [2020-10-12 15:49:54,611 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2020-10-12 15:49:55,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:55,176 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-10-12 15:49:55,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:49:55,177 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-10-12 15:49:55,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:55,178 INFO L225 Difference]: With dead ends: 114 [2020-10-12 15:49:55,178 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 15:49:55,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:49:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 15:49:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-10-12 15:49:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 15:49:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-12 15:49:55,186 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2020-10-12 15:49:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:55,186 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-12 15:49:55,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 15:49:55,187 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-12 15:49:55,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 15:49:55,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:55,187 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:55,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:49:55,188 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:55,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1766875891, now seen corresponding path program 18 times [2020-10-12 15:49:55,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:55,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610388113] [2020-10-12 15:49:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:55,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:59,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:59,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 15:49:59,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:59,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4200 [2020-10-12 15:49:59,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 15:49:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:49:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 15:49:59,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:00,547 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-10-12 15:50:00,742 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-12 15:50:00,989 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-12 15:50:01,199 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 52 [2020-10-12 15:50:01,590 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 70 [2020-10-12 15:50:01,922 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 65 [2020-10-12 15:50:02,560 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 81 [2020-10-12 15:50:02,931 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 71 [2020-10-12 15:50:03,604 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 91 [2020-10-12 15:50:04,078 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 81 [2020-10-12 15:50:04,819 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 98 [2020-10-12 15:50:05,487 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 81 [2020-10-12 15:50:06,181 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 77 [2020-10-12 15:50:06,707 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 60 [2020-10-12 15:50:07,264 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 57 [2020-10-12 15:50:07,552 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 51 [2020-10-12 15:50:07,794 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2020-10-12 15:50:08,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:50:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:08,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:08,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:08,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:50:08,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:08,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:50:08,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:08,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:50:08,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:50:08,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:50:08,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 36 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:50:08,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610388113] [2020-10-12 15:50:08,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:50:08,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 15:50:08,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906537228] [2020-10-12 15:50:08,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 15:50:08,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:50:08,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 15:50:08,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:50:08,614 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 33 states. [2020-10-12 15:50:09,883 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-12 15:50:10,138 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-12 15:50:10,401 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2020-10-12 15:50:10,730 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 86 [2020-10-12 15:50:11,097 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 102 [2020-10-12 15:50:11,492 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 104 [2020-10-12 15:50:12,120 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 134 [2020-10-12 15:50:12,658 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 127 [2020-10-12 15:50:13,488 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 157 [2020-10-12 15:50:14,195 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 146 [2020-10-12 15:50:15,255 WARN L193 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 175 [2020-10-12 15:50:15,995 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 171 [2020-10-12 15:50:17,218 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 375 DAG size of output: 201 [2020-10-12 15:50:17,933 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 173 [2020-10-12 15:50:18,492 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 141 [2020-10-12 15:50:18,948 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 144 [2020-10-12 15:50:19,247 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 106 [2020-10-12 15:50:19,521 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 108 [2020-10-12 15:50:19,752 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2020-10-12 15:50:19,985 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 93 [2020-10-12 15:50:20,170 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-12 15:50:20,348 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-12 15:50:21,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:50:21,305 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2020-10-12 15:50:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 15:50:21,306 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 78 [2020-10-12 15:50:21,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:50:21,307 INFO L225 Difference]: With dead ends: 87 [2020-10-12 15:50:21,307 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 15:50:21,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=1016, Invalid=3954, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 15:50:21,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 15:50:21,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-12 15:50:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 15:50:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-12 15:50:21,316 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 78 [2020-10-12 15:50:21,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:50:21,317 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-12 15:50:21,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 15:50:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-12 15:50:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 15:50:21,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:50:21,318 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:50:21,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:50:21,318 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:50:21,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:50:21,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2114702631, now seen corresponding path program 19 times [2020-10-12 15:50:21,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:50:21,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703441504] [2020-10-12 15:50:21,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:50:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:21,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:25,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:25,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 15:50:25,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:25,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3803 [2020-10-12 15:50:25,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:25,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 15:50:25,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:50:25,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 15:50:25,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:26,217 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-12 15:50:26,547 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-12 15:50:26,788 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-12 15:50:27,158 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2020-10-12 15:50:27,353 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-12 15:50:27,774 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 81 [2020-10-12 15:50:27,984 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-12 15:50:28,416 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 90 [2020-10-12 15:50:28,680 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 78 [2020-10-12 15:50:28,944 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 80 [2020-10-12 15:50:30,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:50:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:30,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:30,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:30,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:50:30,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:30,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:50:30,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:50:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:50:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:50:30,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 10 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:50:30,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703441504] [2020-10-12 15:50:30,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:50:30,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 15:50:30,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957924375] [2020-10-12 15:50:30,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 15:50:30,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:50:30,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 15:50:30,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:50:30,110 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 33 states. [2020-10-12 15:50:31,154 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2020-10-12 15:50:31,603 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-10-12 15:50:32,389 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-12 15:50:33,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:50:33,369 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-10-12 15:50:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 15:50:33,370 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 81 [2020-10-12 15:50:33,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:50:33,371 INFO L225 Difference]: With dead ends: 124 [2020-10-12 15:50:33,372 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 15:50:33,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:50:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 15:50:33,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-12 15:50:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 15:50:33,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-12 15:50:33,381 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2020-10-12 15:50:33,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:50:33,382 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-12 15:50:33,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 15:50:33,382 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-12 15:50:33,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 15:50:33,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:50:33,383 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:50:33,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:50:33,383 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:50:33,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:50:33,384 INFO L82 PathProgramCache]: Analyzing trace with hash 265222354, now seen corresponding path program 20 times [2020-10-12 15:50:33,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:50:33,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067539729] [2020-10-12 15:50:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:50:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:33,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:38,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:38,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 15:50:38,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:38,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4845 [2020-10-12 15:50:38,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:38,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 15:50:38,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:50:38,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 15:50:38,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:40,421 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-12 15:50:40,597 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 53 [2020-10-12 15:50:40,942 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 76 [2020-10-12 15:50:41,198 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 68 [2020-10-12 15:50:41,677 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 87 [2020-10-12 15:50:42,029 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 73 [2020-10-12 15:50:43,109 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 93 [2020-10-12 15:50:43,887 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 84 [2020-10-12 15:50:44,657 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 106 [2020-10-12 15:50:45,653 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 92 [2020-10-12 15:50:46,766 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 87 [2020-10-12 15:50:47,327 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 65 [2020-10-12 15:50:47,884 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 60 [2020-10-12 15:50:48,267 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 55 [2020-10-12 15:50:48,475 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2020-10-12 15:50:49,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:50:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:49,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:49,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:49,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:50:49,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:49,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:50:49,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:49,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:50:49,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:50:49,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:50:49,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 40 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:50:49,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067539729] [2020-10-12 15:50:49,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:50:49,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 15:50:49,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712065585] [2020-10-12 15:50:49,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 15:50:49,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:50:49,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 15:50:49,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:50:49,368 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 36 states. [2020-10-12 15:50:50,813 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-12 15:50:51,063 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-12 15:50:51,378 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 99 [2020-10-12 15:50:51,698 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2020-10-12 15:50:52,155 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 127 [2020-10-12 15:50:52,551 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 115 [2020-10-12 15:50:53,137 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 153 [2020-10-12 15:50:53,605 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 134 [2020-10-12 15:50:54,384 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 182 [2020-10-12 15:50:55,021 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 163 [2020-10-12 15:50:56,198 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 362 DAG size of output: 212 [2020-10-12 15:50:56,929 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 192 [2020-10-12 15:50:58,380 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 396 DAG size of output: 233 [2020-10-12 15:50:59,089 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 194 [2020-10-12 15:50:59,703 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 170 [2020-10-12 15:51:00,162 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 172 [2020-10-12 15:51:00,560 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 145 [2020-10-12 15:51:01,041 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 147 [2020-10-12 15:51:01,360 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 125 [2020-10-12 15:51:01,679 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 127 [2020-10-12 15:51:01,931 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 101 [2020-10-12 15:51:02,182 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 103 [2020-10-12 15:51:02,542 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-12 15:51:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:51:03,443 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-10-12 15:51:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 15:51:03,446 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 85 [2020-10-12 15:51:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:51:03,447 INFO L225 Difference]: With dead ends: 94 [2020-10-12 15:51:03,448 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 15:51:03,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1278, Invalid=4728, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 15:51:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 15:51:03,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2020-10-12 15:51:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 15:51:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-12 15:51:03,458 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2020-10-12 15:51:03,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:51:03,458 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-12 15:51:03,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 15:51:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-12 15:51:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 15:51:03,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:51:03,459 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:51:03,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:51:03,460 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:51:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:51:03,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1495868262, now seen corresponding path program 21 times [2020-10-12 15:51:03,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:51:03,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615941840] [2020-10-12 15:51:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:51:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:51:03,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:51:08,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:51:08,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 15:51:08,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:51:08,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-12 15:51:08,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:51:08,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 15:51:08,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:51:08,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 15:51:08,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0