/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/list-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:34:25,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:34:25,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:34:25,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:34:25,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:34:25,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:34:25,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:34:25,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:34:25,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:34:25,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:34:25,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:34:25,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:34:25,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:34:25,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:34:25,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:34:25,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:34:25,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:34:25,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:34:25,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:34:25,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:34:25,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:34:25,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:34:25,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:34:25,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:34:25,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:34:25,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:34:25,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:34:25,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:34:25,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:34:25,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:34:25,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:34:25,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:34:25,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:34:25,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:34:25,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:34:25,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:34:25,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:34:25,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:34:25,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:34:25,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:34:25,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:34:25,405 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 23:34:25,428 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:34:25,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:34:25,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:34:25,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:34:25,430 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:34:25,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:34:25,430 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:34:25,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:34:25,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:34:25,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:34:25,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:34:25,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:34:25,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:34:25,432 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:34:25,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:34:25,432 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:34:25,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:34:25,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:34:25,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:34:25,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:34:25,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:34:25,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:34:25,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:34:25,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:34:25,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:34:25,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:34:25,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:34:25,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:34:25,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:34:25,435 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:34:25,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:34:25,749 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:34:25,753 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:34:25,755 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:34:25,755 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:34:25,756 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-1.i [2020-10-14 23:34:25,820 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34c4bf379/ee50c808db9b475db35ce55d748951ee/FLAGdde8c7892 [2020-10-14 23:34:26,389 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:34:26,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-1.i [2020-10-14 23:34:26,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34c4bf379/ee50c808db9b475db35ce55d748951ee/FLAGdde8c7892 [2020-10-14 23:34:26,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34c4bf379/ee50c808db9b475db35ce55d748951ee [2020-10-14 23:34:26,646 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:34:26,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:34:26,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:34:26,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:34:26,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:34:26,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:34:26" (1/1) ... [2020-10-14 23:34:26,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a47163c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:26, skipping insertion in model container [2020-10-14 23:34:26,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:34:26" (1/1) ... [2020-10-14 23:34:26,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:34:26,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:34:27,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:34:27,241 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:34:27,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:34:27,373 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:34:27,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:27 WrapperNode [2020-10-14 23:34:27,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:34:27,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:34:27,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:34:27,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:34:27,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:27" (1/1) ... [2020-10-14 23:34:27,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:27" (1/1) ... [2020-10-14 23:34:27,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:27" (1/1) ... [2020-10-14 23:34:27,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:27" (1/1) ... [2020-10-14 23:34:27,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:27" (1/1) ... [2020-10-14 23:34:27,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:27" (1/1) ... [2020-10-14 23:34:27,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:27" (1/1) ... [2020-10-14 23:34:27,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:34:27,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:34:27,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:34:27,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:34:27,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:27" (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 [2020-10-14 23:34:27,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:34:27,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:34:27,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 23:34:27,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 23:34:27,508 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-14 23:34:27,508 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-14 23:34:27,508 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-14 23:34:27,508 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 23:34:27,508 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:34:27,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:34:27,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:34:27,509 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 23:34:27,509 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 23:34:27,509 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 23:34:27,509 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 23:34:27,510 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 23:34:27,510 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 23:34:27,510 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 23:34:27,510 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 23:34:27,510 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 23:34:27,510 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 23:34:27,511 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 23:34:27,511 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 23:34:27,511 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 23:34:27,511 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 23:34:27,511 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 23:34:27,511 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 23:34:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 23:34:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 23:34:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-14 23:34:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-14 23:34:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-14 23:34:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 23:34:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 23:34:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 23:34:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 23:34:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 23:34:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 23:34:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 23:34:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 23:34:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 23:34:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 23:34:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 23:34:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 23:34:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 23:34:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 23:34:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 23:34:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 23:34:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 23:34:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 23:34:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 23:34:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 23:34:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 23:34:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 23:34:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 23:34:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 23:34:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 23:34:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 23:34:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 23:34:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 23:34:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 23:34:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 23:34:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 23:34:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 23:34:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 23:34:27,521 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 23:34:27,521 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 23:34:27,522 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 23:34:27,522 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 23:34:27,523 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 23:34:27,523 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 23:34:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 23:34:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 23:34:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 23:34:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:34:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 23:34:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 23:34:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 23:34:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:34:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 23:34:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 23:34:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 23:34:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 23:34:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 23:34:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 23:34:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 23:34:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 23:34:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 23:34:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 23:34:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 23:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 23:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 23:34:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 23:34:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 23:34:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 23:34:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 23:34:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 23:34:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 23:34:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 23:34:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 23:34:27,530 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 23:34:27,530 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 23:34:27,530 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 23:34:27,530 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 23:34:27,530 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 23:34:27,530 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 23:34:27,530 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 23:34:27,531 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 23:34:27,531 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 23:34:27,531 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 23:34:27,531 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 23:34:27,531 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 23:34:27,531 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 23:34:27,531 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 23:34:27,532 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 23:34:27,532 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 23:34:27,532 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 23:34:27,533 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 23:34:27,533 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 23:34:27,533 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:34:27,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 23:34:27,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:34:27,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 23:34:27,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 23:34:27,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:34:27,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:34:27,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:34:27,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:34:27,841 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 23:34:28,026 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:34:28,026 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 23:34:28,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:34:28 BoogieIcfgContainer [2020-10-14 23:34:28,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:34:28,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:34:28,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:34:28,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:34:28,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:34:26" (1/3) ... [2020-10-14 23:34:28,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0907bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:34:28, skipping insertion in model container [2020-10-14 23:34:28,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:27" (2/3) ... [2020-10-14 23:34:28,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0907bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:34:28, skipping insertion in model container [2020-10-14 23:34:28,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:34:28" (3/3) ... [2020-10-14 23:34:28,044 INFO L109 eAbstractionObserver]: Analyzing ICFG list-1.i [2020-10-14 23:34:28,055 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:34:28,068 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:34:28,079 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:34:28,099 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:34:28,100 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:34:28,100 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:34:28,100 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:34:28,100 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:34:28,100 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:34:28,100 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:34:28,100 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:34:28,116 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-14 23:34:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:34:28,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:28,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:28,124 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1613857984, now seen corresponding path program 1 times [2020-10-14 23:34:28,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:28,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960017984] [2020-10-14 23:34:28,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:28,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:28,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:28,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:28,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:28,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:28,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:28,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:34:28,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:34:28,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-14 23:34:28,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:28,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:28,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:34:28,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:34:28,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:34:28,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 23:34:28,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:28,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:28,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:28,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:28,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:28,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 23:34:28,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:28,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:28,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:28,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:28,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:28,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:28,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960017984] [2020-10-14 23:34:28,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:34:28,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:34:28,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813125039] [2020-10-14 23:34:28,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:34:28,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:28,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:34:28,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:34:28,705 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-10-14 23:34:28,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:28,964 INFO L93 Difference]: Finished difference Result 87 states and 121 transitions. [2020-10-14 23:34:28,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:34:28,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 23:34:28,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:28,976 INFO L225 Difference]: With dead ends: 87 [2020-10-14 23:34:28,977 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 23:34:28,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:34:29,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 23:34:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-10-14 23:34:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 23:34:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-14 23:34:29,030 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 16 [2020-10-14 23:34:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:29,030 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-14 23:34:29,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:34:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-14 23:34:29,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:34:29,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:29,032 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:29,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:34:29,033 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:29,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2024806125, now seen corresponding path program 1 times [2020-10-14 23:34:29,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:29,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338352821] [2020-10-14 23:34:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:29,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:29,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:29,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:34:29,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:29,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-14 23:34:29,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:29,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:34:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:34:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:34:29,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:34:29,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:29,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:29,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:29,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:29,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:29,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 23:34:29,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:29,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:29,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:29,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:29,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:29,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:29,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338352821] [2020-10-14 23:34:29,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:34:29,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:34:29,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254552699] [2020-10-14 23:34:29,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:34:29,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:29,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:34:29,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:34:29,298 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-10-14 23:34:29,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:29,468 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-14 23:34:29,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:34:29,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-14 23:34:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:29,470 INFO L225 Difference]: With dead ends: 52 [2020-10-14 23:34:29,470 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 23:34:29,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:34:29,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 23:34:29,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-10-14 23:34:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 23:34:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-14 23:34:29,480 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-10-14 23:34:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:29,481 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-14 23:34:29,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:34:29,481 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-14 23:34:29,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:34:29,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:29,482 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:29,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:34:29,483 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:29,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1000103149, now seen corresponding path program 1 times [2020-10-14 23:34:29,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:29,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340582296] [2020-10-14 23:34:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:29,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:29,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:29,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:34:29,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:29,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-14 23:34:29,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:29,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:29,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:34:29,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:34:29,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:34:29,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:29,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:29,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:29,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:29,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:29,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:29,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:34:29,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:29,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:29,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:29,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:29,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:29,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:29,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340582296] [2020-10-14 23:34:29,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:34:29,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:34:29,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989018795] [2020-10-14 23:34:29,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:34:29,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:29,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:34:29,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:34:29,638 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-10-14 23:34:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:29,783 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-14 23:34:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:34:29,784 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-14 23:34:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:29,785 INFO L225 Difference]: With dead ends: 52 [2020-10-14 23:34:29,785 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 23:34:29,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:34:29,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 23:34:29,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-10-14 23:34:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:34:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-14 23:34:29,792 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-10-14 23:34:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:29,793 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-14 23:34:29,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:34:29,793 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-14 23:34:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:34:29,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:29,794 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:29,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:34:29,795 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:29,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:29,795 INFO L82 PathProgramCache]: Analyzing trace with hash 422878047, now seen corresponding path program 1 times [2020-10-14 23:34:29,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:29,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135343996] [2020-10-14 23:34:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:29,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:29,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:30,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:30,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:34:30,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:34:30,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-14 23:34:30,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:30,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:30,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:34:30,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:30,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:34:30,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:30,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:30,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:30,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:30,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:30,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:30,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 23:34:30,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:30,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:30,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:30,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:30,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:30,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:30,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135343996] [2020-10-14 23:34:30,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:30,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:34:30,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401768057] [2020-10-14 23:34:30,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:34:30,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:30,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:34:30,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:34:30,338 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2020-10-14 23:34:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:30,625 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-14 23:34:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:34:30,625 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 23:34:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:30,626 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:34:30,626 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 23:34:30,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:34:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 23:34:30,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2020-10-14 23:34:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:34:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-14 23:34:30,641 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2020-10-14 23:34:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:30,641 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-14 23:34:30,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:34:30,641 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-14 23:34:30,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:34:30,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:30,642 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:30,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:34:30,643 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:30,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:30,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1286279711, now seen corresponding path program 1 times [2020-10-14 23:34:30,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:30,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231325484] [2020-10-14 23:34:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:30,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:30,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:30,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:30,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:34:30,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:34:30,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-14 23:34:30,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:30,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:30,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:34:30,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:30,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:34:30,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:31,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:31,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:31,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:31,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:31,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:31,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:34:31,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:31,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:31,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:31,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:31,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:31,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:31,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231325484] [2020-10-14 23:34:31,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:31,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:34:31,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557800014] [2020-10-14 23:34:31,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:34:31,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:31,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:34:31,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:34:31,060 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 9 states. [2020-10-14 23:34:31,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:31,345 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-10-14 23:34:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:34:31,346 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 23:34:31,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:31,347 INFO L225 Difference]: With dead ends: 65 [2020-10-14 23:34:31,347 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 23:34:31,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:34:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 23:34:31,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-10-14 23:34:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:34:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-14 23:34:31,355 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 24 [2020-10-14 23:34:31,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:31,355 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-14 23:34:31,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:34:31,356 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-14 23:34:31,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:34:31,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:31,357 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:31,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:34:31,358 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:31,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:31,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1587413318, now seen corresponding path program 1 times [2020-10-14 23:34:31,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:31,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021465051] [2020-10-14 23:34:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:31,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:31,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:31,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:34:31,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:31,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-14 23:34:31,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:31,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:31,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:34:31,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:31,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:34:31,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:31,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:31,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:31,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:31,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:31,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:31,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:34:31,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:31,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:31,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:31,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:31,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:31,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:31,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021465051] [2020-10-14 23:34:31,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:31,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:34:31,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879119336] [2020-10-14 23:34:31,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:34:31,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:31,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:34:31,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:34:31,744 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2020-10-14 23:34:32,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:32,151 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-14 23:34:32,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:34:32,152 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 23:34:32,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:32,153 INFO L225 Difference]: With dead ends: 67 [2020-10-14 23:34:32,153 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 23:34:32,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:34:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 23:34:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-10-14 23:34:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:34:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-14 23:34:32,161 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 26 [2020-10-14 23:34:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:32,162 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-14 23:34:32,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:34:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-14 23:34:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:34:32,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:32,164 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:32,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:34:32,165 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:32,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:32,165 INFO L82 PathProgramCache]: Analyzing trace with hash -742131883, now seen corresponding path program 2 times [2020-10-14 23:34:32,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:32,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310329610] [2020-10-14 23:34:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:32,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:32,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:32,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:34:32,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:32,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-14 23:34:32,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:32,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:32,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:34:32,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:32,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:34:32,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:32,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:32,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:32,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:32,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:32,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:32,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:34:32,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:32,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:32,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:32,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:32,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:32,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:32,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310329610] [2020-10-14 23:34:32,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:32,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:34:32,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119404113] [2020-10-14 23:34:32,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:34:32,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:32,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:34:32,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:34:32,457 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 10 states. [2020-10-14 23:34:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:32,725 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-10-14 23:34:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:34:32,725 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 23:34:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:32,726 INFO L225 Difference]: With dead ends: 69 [2020-10-14 23:34:32,726 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 23:34:32,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:34:32,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 23:34:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-10-14 23:34:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 23:34:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-14 23:34:32,733 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-10-14 23:34:32,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:32,733 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-14 23:34:32,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:34:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-14 23:34:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:34:32,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:32,734 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:32,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:34:32,735 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:32,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:32,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1474620245, now seen corresponding path program 1 times [2020-10-14 23:34:32,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:32,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054651499] [2020-10-14 23:34:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:32,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:32,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:33,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:33,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:34:33,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:34:33,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-14 23:34:33,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:33,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:33,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:34:33,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:33,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:34:33,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:33,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:33,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:33,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:33,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:33,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:33,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:34:33,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:33,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:33,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:33,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:33,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:33,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054651499] [2020-10-14 23:34:33,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:33,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:34:33,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426393086] [2020-10-14 23:34:33,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:34:33,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:33,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:34:33,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:34:33,405 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-10-14 23:34:33,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:33,776 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-14 23:34:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:34:33,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 23:34:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:33,778 INFO L225 Difference]: With dead ends: 62 [2020-10-14 23:34:33,779 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 23:34:33,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:34:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 23:34:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-10-14 23:34:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 23:34:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-14 23:34:33,790 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-10-14 23:34:33,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:33,790 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-14 23:34:33,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:34:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-14 23:34:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:34:33,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:33,792 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:33,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:34:33,792 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:33,793 INFO L82 PathProgramCache]: Analyzing trace with hash -149429434, now seen corresponding path program 2 times [2020-10-14 23:34:33,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:33,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698326550] [2020-10-14 23:34:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:33,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:34,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:34,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:34:34,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:34,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-14 23:34:34,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:34,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:34,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:34:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:34:34,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:34,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:34,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:34,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:34,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:34,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:34,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:34:34,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:34,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:34,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:34,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:34,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:34,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:34,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698326550] [2020-10-14 23:34:34,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:34,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:34:34,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468089119] [2020-10-14 23:34:34,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:34:34,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:34,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:34:34,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:34:34,359 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 11 states. [2020-10-14 23:34:34,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:34,591 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-14 23:34:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:34:34,591 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 23:34:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:34,592 INFO L225 Difference]: With dead ends: 60 [2020-10-14 23:34:34,592 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 23:34:34,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:34:34,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 23:34:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2020-10-14 23:34:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 23:34:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-14 23:34:34,598 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 28 [2020-10-14 23:34:34,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:34,598 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-14 23:34:34,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:34:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-14 23:34:34,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:34:34,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:34,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:34,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:34:34,600 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:34,601 INFO L82 PathProgramCache]: Analyzing trace with hash 150272518, now seen corresponding path program 1 times [2020-10-14 23:34:34,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:34,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176136645] [2020-10-14 23:34:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:34,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:34,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:34,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:34:34,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:34,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-14 23:34:34,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:34,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:34,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:34:34,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:34,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:34:34,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:34,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:34,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:34,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:34,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:34,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:34:34,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:34,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:34,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:34,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:34,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:34,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:34,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176136645] [2020-10-14 23:34:34,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:34,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:34:34,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311573765] [2020-10-14 23:34:34,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:34:34,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:34,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:34:34,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:34:34,952 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 11 states. [2020-10-14 23:34:35,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:35,180 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-14 23:34:35,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:34:35,180 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 23:34:35,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:35,181 INFO L225 Difference]: With dead ends: 56 [2020-10-14 23:34:35,181 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 23:34:35,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:34:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 23:34:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-14 23:34:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:34:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-14 23:34:35,187 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 28 [2020-10-14 23:34:35,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:35,187 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-14 23:34:35,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:34:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-14 23:34:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:34:35,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:35,189 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:35,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:34:35,189 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1819088671, now seen corresponding path program 3 times [2020-10-14 23:34:35,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:35,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303086100] [2020-10-14 23:34:35,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:35,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:35,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:35,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:34:35,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:35,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-14 23:34:35,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:35,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:35,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:34:35,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:35,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:34:35,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 29 [2020-10-14 23:34:35,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:35,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:35,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:35,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:35,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:35,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:34:35,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:35,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:35,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:35,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:35,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:35,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:35,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303086100] [2020-10-14 23:34:35,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:35,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:34:35,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093797695] [2020-10-14 23:34:35,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:34:35,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:35,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:34:35,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:34:35,746 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 12 states. [2020-10-14 23:34:36,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:36,179 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-10-14 23:34:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:34:36,180 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 23:34:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:36,181 INFO L225 Difference]: With dead ends: 80 [2020-10-14 23:34:36,181 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 23:34:36,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:34:36,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 23:34:36,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2020-10-14 23:34:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 23:34:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-14 23:34:36,194 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 30 [2020-10-14 23:34:36,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:36,194 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-14 23:34:36,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:34:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-14 23:34:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:34:36,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:36,196 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:36,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:34:36,196 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:36,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:36,197 INFO L82 PathProgramCache]: Analyzing trace with hash 256692321, now seen corresponding path program 1 times [2020-10-14 23:34:36,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:36,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529301967] [2020-10-14 23:34:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:36,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:36,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:36,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:34:36,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:36,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-14 23:34:36,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:36,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:36,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:34:36,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:36,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:34:36,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:34:36,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:36,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:36,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:36,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:36,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:36,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-14 23:34:36,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:36,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:36,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:36,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:36,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:36,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:36,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529301967] [2020-10-14 23:34:36,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:36,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:34:36,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269236586] [2020-10-14 23:34:36,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:34:36,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:34:36,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:34:36,640 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 12 states. [2020-10-14 23:34:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:37,055 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-10-14 23:34:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:34:37,056 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 23:34:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:37,057 INFO L225 Difference]: With dead ends: 91 [2020-10-14 23:34:37,058 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 23:34:37,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:34:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 23:34:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-14 23:34:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 23:34:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-10-14 23:34:37,065 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 30 [2020-10-14 23:34:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:37,065 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-10-14 23:34:37,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:34:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-10-14 23:34:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:34:37,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:37,067 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:37,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:34:37,067 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:37,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:37,067 INFO L82 PathProgramCache]: Analyzing trace with hash -43846724, now seen corresponding path program 4 times [2020-10-14 23:34:37,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:37,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895030404] [2020-10-14 23:34:37,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:37,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:37,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:37,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:34:37,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:37,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-14 23:34:37,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:37,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:37,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:34:37,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:37,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:34:37,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:37,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:37,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:37,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:37,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:37,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:37,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:34:37,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:37,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:37,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:37,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:37,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:37,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:37,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895030404] [2020-10-14 23:34:37,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:37,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:34:37,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152637375] [2020-10-14 23:34:37,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:34:37,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:37,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:34:37,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:34:37,537 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 13 states. [2020-10-14 23:34:38,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:38,074 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2020-10-14 23:34:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:34:38,074 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-14 23:34:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:38,075 INFO L225 Difference]: With dead ends: 95 [2020-10-14 23:34:38,075 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 23:34:38,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:34:38,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 23:34:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2020-10-14 23:34:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 23:34:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-10-14 23:34:38,082 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 32 [2020-10-14 23:34:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:38,083 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-10-14 23:34:38,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:34:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-10-14 23:34:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:34:38,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:38,084 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:38,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:34:38,085 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:38,085 INFO L82 PathProgramCache]: Analyzing trace with hash 861647831, now seen corresponding path program 5 times [2020-10-14 23:34:38,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:38,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214939696] [2020-10-14 23:34:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:38,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:38,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:38,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:34:38,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:38,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-14 23:34:38,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:38,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:38,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:34:38,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:38,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:34:38,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:38,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:38,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:38,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:38,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:38,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:38,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:34:38,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:38,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:38,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:38,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:38,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:38,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:38,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214939696] [2020-10-14 23:34:38,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:38,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:34:38,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118026426] [2020-10-14 23:34:38,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:34:38,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:38,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:34:38,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:34:38,708 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 13 states. [2020-10-14 23:34:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:39,396 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2020-10-14 23:34:39,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:34:39,396 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 23:34:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:39,397 INFO L225 Difference]: With dead ends: 97 [2020-10-14 23:34:39,398 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 23:34:39,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:34:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 23:34:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-14 23:34:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 23:34:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-10-14 23:34:39,404 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 34 [2020-10-14 23:34:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:39,404 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-10-14 23:34:39,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:34:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-10-14 23:34:39,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:34:39,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:39,406 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:39,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:34:39,406 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:39,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:39,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1881366999, now seen corresponding path program 2 times [2020-10-14 23:34:39,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:39,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354545512] [2020-10-14 23:34:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:39,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:39,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:39,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:39,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:39,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:40,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:40,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:34:40,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:34:40,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1334 [2020-10-14 23:34:40,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:40,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:40,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:34:40,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:40,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:34:40,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:40,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:40,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:40,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:40,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:40,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:40,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:40,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:40,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:40,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:40,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:40,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:40,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:34:40,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354545512] [2020-10-14 23:34:40,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:40,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:34:40,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417589001] [2020-10-14 23:34:40,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:34:40,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:40,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:34:40,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:34:40,924 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 11 states. [2020-10-14 23:34:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:41,226 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2020-10-14 23:34:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:34:41,226 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-14 23:34:41,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:41,227 INFO L225 Difference]: With dead ends: 86 [2020-10-14 23:34:41,227 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 23:34:41,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:34:41,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 23:34:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-10-14 23:34:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 23:34:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-10-14 23:34:41,237 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 34 [2020-10-14 23:34:41,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:41,238 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-10-14 23:34:41,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:34:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-10-14 23:34:41,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:34:41,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:41,240 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:41,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:34:41,240 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:41,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:41,240 INFO L82 PathProgramCache]: Analyzing trace with hash -781949048, now seen corresponding path program 6 times [2020-10-14 23:34:41,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:41,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567308580] [2020-10-14 23:34:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:41,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:41,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:41,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:34:41,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:41,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-14 23:34:41,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:41,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:41,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:34:41,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:41,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:34:41,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:41,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:41,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:41,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:41,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:41,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:41,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:34:41,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:41,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:41,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:41,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:41,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:41,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:41,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567308580] [2020-10-14 23:34:41,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:41,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:34:41,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100079792] [2020-10-14 23:34:41,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:34:41,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:41,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:34:41,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:34:41,969 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 14 states. [2020-10-14 23:34:42,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:42,548 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-10-14 23:34:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:34:42,549 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-14 23:34:42,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:42,550 INFO L225 Difference]: With dead ends: 91 [2020-10-14 23:34:42,550 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 23:34:42,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:34:42,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 23:34:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2020-10-14 23:34:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 23:34:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-10-14 23:34:42,556 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 34 [2020-10-14 23:34:42,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:42,556 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-10-14 23:34:42,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:34:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-10-14 23:34:42,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:34:42,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:42,558 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:42,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:34:42,558 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:42,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1577347223, now seen corresponding path program 1 times [2020-10-14 23:34:42,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:42,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746510426] [2020-10-14 23:34:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:42,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:42,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:42,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:42,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:34:42,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:34:42,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-14 23:34:42,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:42,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:42,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:34:42,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:42,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:34:42,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:43,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:43,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:43,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:43,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:43,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:43,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:43,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:43,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:43,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:43,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:43,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:43,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:34:43,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746510426] [2020-10-14 23:34:43,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:43,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:34:43,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200547347] [2020-10-14 23:34:43,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:34:43,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:43,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:34:43,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:34:43,222 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 12 states. [2020-10-14 23:34:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:43,810 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2020-10-14 23:34:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:34:43,811 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-14 23:34:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:43,812 INFO L225 Difference]: With dead ends: 101 [2020-10-14 23:34:43,812 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 23:34:43,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:34:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 23:34:43,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2020-10-14 23:34:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 23:34:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2020-10-14 23:34:43,818 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 34 [2020-10-14 23:34:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:43,818 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2020-10-14 23:34:43,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:34:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2020-10-14 23:34:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:34:43,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:43,819 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:43,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:34:43,820 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:43,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:43,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1828114263, now seen corresponding path program 2 times [2020-10-14 23:34:43,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:43,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026863370] [2020-10-14 23:34:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:43,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:44,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:44,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:34:44,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:44,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-14 23:34:44,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:44,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:44,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:34:44,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:44,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:34:44,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:44,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:44,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:44,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:44,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:44,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:44,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:44,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:44,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:44,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:44,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:44,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:44,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:44,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026863370] [2020-10-14 23:34:44,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:44,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:34:44,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590432628] [2020-10-14 23:34:44,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:34:44,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:34:44,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:34:44,305 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 13 states. [2020-10-14 23:34:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:44,836 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2020-10-14 23:34:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:34:44,836 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 23:34:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:44,837 INFO L225 Difference]: With dead ends: 98 [2020-10-14 23:34:44,837 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 23:34:44,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:34:44,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 23:34:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2020-10-14 23:34:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 23:34:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-10-14 23:34:44,847 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 34 [2020-10-14 23:34:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:44,848 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-10-14 23:34:44,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:34:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-10-14 23:34:44,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:34:44,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:44,849 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:44,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:34:44,852 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:44,852 INFO L82 PathProgramCache]: Analyzing trace with hash 189501192, now seen corresponding path program 2 times [2020-10-14 23:34:44,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:44,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421449453] [2020-10-14 23:34:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:44,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:45,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:45,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:34:45,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:45,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-14 23:34:45,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:45,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:45,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:34:45,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:45,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:34:45,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:45,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:45,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:45,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:45,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:45,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:45,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:34:45,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:45,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:45,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:45,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:45,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:45,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:45,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421449453] [2020-10-14 23:34:45,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:45,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:34:45,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100407376] [2020-10-14 23:34:45,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:34:45,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:45,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:34:45,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:34:45,421 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 14 states. [2020-10-14 23:34:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:45,969 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-10-14 23:34:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:34:45,970 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-14 23:34:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:45,971 INFO L225 Difference]: With dead ends: 83 [2020-10-14 23:34:45,971 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 23:34:45,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:34:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 23:34:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-14 23:34:45,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 23:34:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-10-14 23:34:45,978 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 34 [2020-10-14 23:34:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:45,978 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-10-14 23:34:45,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:34:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-10-14 23:34:45,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:34:45,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:45,979 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:45,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:34:45,980 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:45,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:45,980 INFO L82 PathProgramCache]: Analyzing trace with hash 214918307, now seen corresponding path program 7 times [2020-10-14 23:34:45,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:45,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556826762] [2020-10-14 23:34:45,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:46,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:46,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:46,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:34:46,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:46,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-14 23:34:46,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:46,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:46,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:34:46,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:46,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:34:46,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:46,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:46,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:46,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:46,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:46,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:46,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 23:34:46,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:46,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:46,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:46,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:46,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:46,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:46,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556826762] [2020-10-14 23:34:46,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:46,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:34:46,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150713222] [2020-10-14 23:34:46,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:34:46,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:34:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:34:46,865 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 15 states. [2020-10-14 23:34:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:47,767 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2020-10-14 23:34:47,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:34:47,768 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-14 23:34:47,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:47,769 INFO L225 Difference]: With dead ends: 122 [2020-10-14 23:34:47,770 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 23:34:47,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:34:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 23:34:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2020-10-14 23:34:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 23:34:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-10-14 23:34:47,778 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 36 [2020-10-14 23:34:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:47,779 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-10-14 23:34:47,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:34:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-10-14 23:34:47,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:34:47,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:47,780 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:47,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:34:47,780 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1199866653, now seen corresponding path program 3 times [2020-10-14 23:34:47,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:47,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098165060] [2020-10-14 23:34:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:47,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:48,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:48,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:34:48,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:48,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-14 23:34:48,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:48,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:48,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:34:48,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:48,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:34:48,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:48,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:48,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:48,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:48,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:48,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:48,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:34:48,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:48,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:48,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:48,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:48,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:48,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:48,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098165060] [2020-10-14 23:34:48,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:48,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:34:48,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905321252] [2020-10-14 23:34:48,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:34:48,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:48,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:34:48,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:34:48,586 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 15 states. [2020-10-14 23:34:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:49,548 INFO L93 Difference]: Finished difference Result 129 states and 147 transitions. [2020-10-14 23:34:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:34:49,548 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-14 23:34:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:49,550 INFO L225 Difference]: With dead ends: 129 [2020-10-14 23:34:49,550 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 23:34:49,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:34:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 23:34:49,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2020-10-14 23:34:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 23:34:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2020-10-14 23:34:49,559 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 36 [2020-10-14 23:34:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:49,560 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2020-10-14 23:34:49,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:34:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2020-10-14 23:34:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:34:49,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:49,561 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:49,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:34:49,561 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:49,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:49,561 INFO L82 PathProgramCache]: Analyzing trace with hash 426739454, now seen corresponding path program 8 times [2020-10-14 23:34:49,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:49,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251563976] [2020-10-14 23:34:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:49,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:49,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:49,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:34:49,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:49,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-14 23:34:49,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:49,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:49,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:34:49,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:49,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:34:49,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:50,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:50,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:50,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:50,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:50,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:50,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:34:50,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:50,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:50,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:50,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:50,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:50,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:50,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251563976] [2020-10-14 23:34:50,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:50,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:34:50,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011619492] [2020-10-14 23:34:50,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:34:50,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:50,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:34:50,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:34:50,474 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 16 states. [2020-10-14 23:34:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:51,483 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2020-10-14 23:34:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:34:51,484 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-14 23:34:51,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:51,486 INFO L225 Difference]: With dead ends: 139 [2020-10-14 23:34:51,486 INFO L226 Difference]: Without dead ends: 135 [2020-10-14 23:34:51,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:34:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-14 23:34:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2020-10-14 23:34:51,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 23:34:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2020-10-14 23:34:51,496 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 38 [2020-10-14 23:34:51,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:51,497 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2020-10-14 23:34:51,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:34:51,497 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2020-10-14 23:34:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:34:51,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:51,498 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:51,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:34:51,498 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:51,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2123398809, now seen corresponding path program 9 times [2020-10-14 23:34:51,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:51,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502845895] [2020-10-14 23:34:51,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:51,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:51,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:51,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:34:51,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:51,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-14 23:34:51,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:51,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:51,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:34:51,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:51,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:34:51,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:52,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:52,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:52,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:52,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:52,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:52,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:52,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:52,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:52,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:52,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:34:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:52,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502845895] [2020-10-14 23:34:52,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:52,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:34:52,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316740616] [2020-10-14 23:34:52,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:34:52,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:52,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:34:52,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:34:52,249 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand 16 states. [2020-10-14 23:34:53,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:53,239 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2020-10-14 23:34:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:34:53,240 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-14 23:34:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:53,241 INFO L225 Difference]: With dead ends: 141 [2020-10-14 23:34:53,241 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 23:34:53,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:34:53,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 23:34:53,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2020-10-14 23:34:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 23:34:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2020-10-14 23:34:53,251 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 40 [2020-10-14 23:34:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:53,251 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2020-10-14 23:34:53,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:34:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2020-10-14 23:34:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:34:53,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:53,252 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:53,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:34:53,253 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:53,253 INFO L82 PathProgramCache]: Analyzing trace with hash -449288551, now seen corresponding path program 3 times [2020-10-14 23:34:53,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:53,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143026401] [2020-10-14 23:34:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:53,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:53,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:53,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:53,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:54,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:54,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:54,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:55,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:55,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:34:55,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:34:55,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2280 [2020-10-14 23:34:55,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:55,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:55,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:34:55,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:55,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:34:55,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:55,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:55,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:55,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:55,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:55,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:55,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:55,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:55,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:55,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:34:55,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143026401] [2020-10-14 23:34:55,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:55,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:34:55,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345897804] [2020-10-14 23:34:55,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:34:55,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:55,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:34:55,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:34:55,806 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 14 states. [2020-10-14 23:34:56,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:56,339 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2020-10-14 23:34:56,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:34:56,339 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-14 23:34:56,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:56,340 INFO L225 Difference]: With dead ends: 117 [2020-10-14 23:34:56,340 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 23:34:56,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:34:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 23:34:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-14 23:34:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 23:34:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2020-10-14 23:34:56,347 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 40 [2020-10-14 23:34:56,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:56,347 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2020-10-14 23:34:56,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:34:56,347 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2020-10-14 23:34:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:34:56,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:56,348 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:56,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:34:56,349 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:56,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1120204278, now seen corresponding path program 10 times [2020-10-14 23:34:56,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:56,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968492648] [2020-10-14 23:34:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:56,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:56,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:56,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:34:56,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:56,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-14 23:34:56,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:56,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:34:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:34:56,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:57,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:57,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:57,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:57,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:57,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:57,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:34:57,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:57,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:57,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:57,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:57,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:57,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:57,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968492648] [2020-10-14 23:34:57,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:57,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:34:57,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955319338] [2020-10-14 23:34:57,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:34:57,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:57,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:34:57,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:34:57,497 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 17 states. [2020-10-14 23:34:58,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:58,846 INFO L93 Difference]: Finished difference Result 152 states and 169 transitions. [2020-10-14 23:34:58,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:34:58,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-14 23:34:58,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:58,848 INFO L225 Difference]: With dead ends: 152 [2020-10-14 23:34:58,848 INFO L226 Difference]: Without dead ends: 148 [2020-10-14 23:34:58,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:34:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-14 23:34:58,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 129. [2020-10-14 23:34:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 23:34:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2020-10-14 23:34:58,861 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 40 [2020-10-14 23:34:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:58,861 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2020-10-14 23:34:58,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:34:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2020-10-14 23:34:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:34:58,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:58,862 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:58,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:34:58,863 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash 841200665, now seen corresponding path program 3 times [2020-10-14 23:34:58,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:58,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951081598] [2020-10-14 23:34:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:58,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:59,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:59,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:59,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:34:59,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:34:59,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-14 23:34:59,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:59,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:59,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:34:59,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:59,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:34:59,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:00,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:00,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:00,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:00,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:00,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:00,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:00,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:00,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:00,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:00,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:00,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:00,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:35:00,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951081598] [2020-10-14 23:35:00,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:00,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:35:00,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023480923] [2020-10-14 23:35:00,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:35:00,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:00,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:35:00,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:35:00,145 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand 15 states. [2020-10-14 23:35:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:00,807 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2020-10-14 23:35:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:35:00,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-14 23:35:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:00,810 INFO L225 Difference]: With dead ends: 150 [2020-10-14 23:35:00,810 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 23:35:00,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:35:00,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 23:35:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2020-10-14 23:35:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 23:35:00,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 145 transitions. [2020-10-14 23:35:00,822 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 145 transitions. Word has length 40 [2020-10-14 23:35:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:00,823 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 145 transitions. [2020-10-14 23:35:00,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:35:00,823 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 145 transitions. [2020-10-14 23:35:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:35:00,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:00,824 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:00,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:35:00,824 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:00,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1310157529, now seen corresponding path program 4 times [2020-10-14 23:35:00,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:00,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081547655] [2020-10-14 23:35:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:00,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:01,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:01,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:35:01,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:01,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-14 23:35:01,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:01,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:35:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:35:01,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:01,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:01,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:01,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:01,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:01,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:01,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:01,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:01,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:01,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:01,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:01,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:01,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:01,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081547655] [2020-10-14 23:35:01,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:01,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:35:01,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353547274] [2020-10-14 23:35:01,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:35:01,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:01,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:35:01,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:35:01,708 INFO L87 Difference]: Start difference. First operand 129 states and 145 transitions. Second operand 16 states. [2020-10-14 23:35:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:02,677 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2020-10-14 23:35:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:35:02,677 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-14 23:35:02,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:02,679 INFO L225 Difference]: With dead ends: 147 [2020-10-14 23:35:02,679 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 23:35:02,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:35:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 23:35:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2020-10-14 23:35:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 23:35:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 139 transitions. [2020-10-14 23:35:02,688 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 139 transitions. Word has length 40 [2020-10-14 23:35:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:02,689 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 139 transitions. [2020-10-14 23:35:02,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:35:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 139 transitions. [2020-10-14 23:35:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:35:02,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:02,690 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:02,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:35:02,690 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1438973366, now seen corresponding path program 4 times [2020-10-14 23:35:02,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:02,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560878400] [2020-10-14 23:35:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:02,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:03,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:03,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:35:03,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:03,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-14 23:35:03,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:03,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:03,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:35:03,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:03,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:35:03,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:03,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:03,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:03,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:03,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:03,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:03,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:35:03,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:03,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:03,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:03,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:03,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:03,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:03,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560878400] [2020-10-14 23:35:03,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:03,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:35:03,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681678965] [2020-10-14 23:35:03,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:35:03,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:03,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:35:03,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:35:03,704 INFO L87 Difference]: Start difference. First operand 124 states and 139 transitions. Second operand 17 states. [2020-10-14 23:35:04,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:04,636 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2020-10-14 23:35:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:35:04,637 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-14 23:35:04,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:04,638 INFO L225 Difference]: With dead ends: 143 [2020-10-14 23:35:04,638 INFO L226 Difference]: Without dead ends: 137 [2020-10-14 23:35:04,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:35:04,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-14 23:35:04,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2020-10-14 23:35:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 23:35:04,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 147 transitions. [2020-10-14 23:35:04,660 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 147 transitions. Word has length 40 [2020-10-14 23:35:04,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:04,660 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 147 transitions. [2020-10-14 23:35:04,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:35:04,661 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 147 transitions. [2020-10-14 23:35:04,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:35:04,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:04,661 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:04,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:35:04,662 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:04,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1569156773, now seen corresponding path program 11 times [2020-10-14 23:35:04,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:04,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241080969] [2020-10-14 23:35:04,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:04,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:05,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:05,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:35:05,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:05,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-14 23:35:05,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:05,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:05,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:35:05,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:05,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:35:05,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:05,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:05,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:05,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:05,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:05,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:05,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:05,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:05,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:05,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:05,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241080969] [2020-10-14 23:35:05,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:05,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:35:05,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905633128] [2020-10-14 23:35:05,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:35:05,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:05,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:35:05,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:35:05,768 INFO L87 Difference]: Start difference. First operand 131 states and 147 transitions. Second operand 18 states. [2020-10-14 23:35:06,376 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-14 23:35:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:06,915 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2020-10-14 23:35:06,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:35:06,916 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-14 23:35:06,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:06,918 INFO L225 Difference]: With dead ends: 166 [2020-10-14 23:35:06,918 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 23:35:06,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:35:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 23:35:06,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 146. [2020-10-14 23:35:06,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-14 23:35:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 164 transitions. [2020-10-14 23:35:06,932 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 164 transitions. Word has length 42 [2020-10-14 23:35:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:06,933 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 164 transitions. [2020-10-14 23:35:06,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:35:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 164 transitions. [2020-10-14 23:35:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:35:06,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:06,934 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:06,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:35:06,935 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:06,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1450211237, now seen corresponding path program 5 times [2020-10-14 23:35:06,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:06,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392016991] [2020-10-14 23:35:06,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:07,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:07,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:07,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:35:07,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:07,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-14 23:35:07,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:07,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:07,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:35:07,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:07,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:35:07,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:08,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:08,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:08,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:08,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:08,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:08,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:08,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:08,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:08,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:08,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:08,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:08,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:08,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392016991] [2020-10-14 23:35:08,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:08,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:35:08,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070429864] [2020-10-14 23:35:08,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:35:08,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:08,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:35:08,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:35:08,200 INFO L87 Difference]: Start difference. First operand 146 states and 164 transitions. Second operand 18 states. [2020-10-14 23:35:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:09,698 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2020-10-14 23:35:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:35:09,698 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-14 23:35:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:09,700 INFO L225 Difference]: With dead ends: 175 [2020-10-14 23:35:09,700 INFO L226 Difference]: Without dead ends: 169 [2020-10-14 23:35:09,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:35:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-14 23:35:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 155. [2020-10-14 23:35:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 23:35:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2020-10-14 23:35:09,712 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 42 [2020-10-14 23:35:09,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:09,712 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2020-10-14 23:35:09,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:35:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2020-10-14 23:35:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:35:09,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:09,713 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:09,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:35:09,713 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:09,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:09,714 INFO L82 PathProgramCache]: Analyzing trace with hash 474814592, now seen corresponding path program 12 times [2020-10-14 23:35:09,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:09,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371717576] [2020-10-14 23:35:09,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:09,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:10,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:10,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:35:10,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:10,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-14 23:35:10,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:10,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:10,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:35:10,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:10,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:35:10,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:11,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:11,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:11,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:11,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:11,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:11,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:11,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:11,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:11,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:11,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:11,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:11,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:11,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371717576] [2020-10-14 23:35:11,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:11,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:35:11,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715068978] [2020-10-14 23:35:11,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:35:11,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:11,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:35:11,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:35:11,045 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand 19 states. [2020-10-14 23:35:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:12,623 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-10-14 23:35:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:35:12,624 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-14 23:35:12,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:12,625 INFO L225 Difference]: With dead ends: 185 [2020-10-14 23:35:12,625 INFO L226 Difference]: Without dead ends: 181 [2020-10-14 23:35:12,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:35:12,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-14 23:35:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 165. [2020-10-14 23:35:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-14 23:35:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2020-10-14 23:35:12,639 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 44 [2020-10-14 23:35:12,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:12,639 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2020-10-14 23:35:12,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:35:12,639 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2020-10-14 23:35:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:35:12,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:12,640 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:12,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:35:12,641 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:12,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:12,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1526178801, now seen corresponding path program 13 times [2020-10-14 23:35:12,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:12,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105118890] [2020-10-14 23:35:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:12,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:13,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:13,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:35:13,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:13,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-14 23:35:13,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:13,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:13,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:35:13,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:13,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:35:13,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:13,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:13,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:13,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:13,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:13,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:13,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:13,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:13,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:13,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:13,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:13,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:13,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:35:13,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105118890] [2020-10-14 23:35:13,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:13,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:35:13,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466959220] [2020-10-14 23:35:13,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:35:13,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:13,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:35:13,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:35:13,803 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand 18 states. [2020-10-14 23:35:14,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:14,689 INFO L93 Difference]: Finished difference Result 181 states and 203 transitions. [2020-10-14 23:35:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:35:14,690 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-14 23:35:14,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:14,691 INFO L225 Difference]: With dead ends: 181 [2020-10-14 23:35:14,691 INFO L226 Difference]: Without dead ends: 177 [2020-10-14 23:35:14,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:35:14,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-14 23:35:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 165. [2020-10-14 23:35:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-14 23:35:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2020-10-14 23:35:14,704 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 44 [2020-10-14 23:35:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:14,705 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2020-10-14 23:35:14,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:35:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2020-10-14 23:35:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:35:14,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:14,706 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:14,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:35:14,706 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:14,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:14,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1078966171, now seen corresponding path program 14 times [2020-10-14 23:35:14,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:14,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985401311] [2020-10-14 23:35:14,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:14,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:15,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:15,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:35:15,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:15,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-14 23:35:15,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:15,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:15,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:35:15,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:15,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:35:15,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:35:16,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:16,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:16,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:16,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:16,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:16,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:16,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:16,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:16,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:16,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:16,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:16,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:16,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985401311] [2020-10-14 23:35:16,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:16,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:35:16,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683224453] [2020-10-14 23:35:16,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:35:16,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:16,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:35:16,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:35:16,069 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand 19 states. [2020-10-14 23:35:17,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:17,371 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2020-10-14 23:35:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:35:17,372 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-14 23:35:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:17,373 INFO L225 Difference]: With dead ends: 193 [2020-10-14 23:35:17,373 INFO L226 Difference]: Without dead ends: 169 [2020-10-14 23:35:17,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:35:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-14 23:35:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 135. [2020-10-14 23:35:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 23:35:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2020-10-14 23:35:17,383 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 46 [2020-10-14 23:35:17,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:17,384 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2020-10-14 23:35:17,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:35:17,384 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2020-10-14 23:35:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:35:17,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:17,385 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:17,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:35:17,385 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:17,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:17,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2122656460, now seen corresponding path program 15 times [2020-10-14 23:35:17,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:17,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768541885] [2020-10-14 23:35:17,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:17,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:17,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:17,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:35:17,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:17,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-14 23:35:17,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:17,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:17,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:35:17,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:17,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:35:17,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:18,381 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-14 23:35:18,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:18,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:18,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:18,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:18,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:18,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:18,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:18,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:18,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:18,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:18,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:18,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:18,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768541885] [2020-10-14 23:35:18,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:18,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:35:18,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256009543] [2020-10-14 23:35:18,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:35:18,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:18,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:35:18,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:35:18,790 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand 20 states. [2020-10-14 23:35:19,914 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-14 23:35:20,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:20,305 INFO L93 Difference]: Finished difference Result 167 states and 185 transitions. [2020-10-14 23:35:20,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:35:20,305 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-14 23:35:20,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:20,307 INFO L225 Difference]: With dead ends: 167 [2020-10-14 23:35:20,307 INFO L226 Difference]: Without dead ends: 163 [2020-10-14 23:35:20,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:35:20,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-14 23:35:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 152. [2020-10-14 23:35:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-14 23:35:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 170 transitions. [2020-10-14 23:35:20,318 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 170 transitions. Word has length 46 [2020-10-14 23:35:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:20,318 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 170 transitions. [2020-10-14 23:35:20,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:35:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 170 transitions. [2020-10-14 23:35:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:35:20,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:20,319 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:20,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:35:20,319 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:20,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:20,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1028425499, now seen corresponding path program 5 times [2020-10-14 23:35:20,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:20,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536268430] [2020-10-14 23:35:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:20,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:20,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:20,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:21,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:21,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:35:21,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:35:21,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-14 23:35:21,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:21,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:21,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:35:21,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:21,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:35:21,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:22,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:22,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:22,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:22,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:22,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:22,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:22,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:22,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:22,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:22,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:22,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:22,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:35:22,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536268430] [2020-10-14 23:35:22,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:22,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:35:22,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987605784] [2020-10-14 23:35:22,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:35:22,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:22,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:35:22,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:35:22,204 INFO L87 Difference]: Start difference. First operand 152 states and 170 transitions. Second operand 17 states. [2020-10-14 23:35:23,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:23,164 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2020-10-14 23:35:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:35:23,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-14 23:35:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:23,166 INFO L225 Difference]: With dead ends: 179 [2020-10-14 23:35:23,166 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 23:35:23,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:35:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 23:35:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2020-10-14 23:35:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-14 23:35:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2020-10-14 23:35:23,177 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 46 [2020-10-14 23:35:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:23,177 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2020-10-14 23:35:23,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:35:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2020-10-14 23:35:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:35:23,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:23,178 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:23,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:35:23,178 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:23,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:23,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1312018981, now seen corresponding path program 6 times [2020-10-14 23:35:23,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:23,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401512] [2020-10-14 23:35:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:23,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:23,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:24,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:24,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:35:24,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:35:24,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1326 [2020-10-14 23:35:24,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:24,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:35:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:35:24,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:25,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:25,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:25,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:25,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:25,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:25,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:25,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:25,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:25,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:25,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:25,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:25,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:35:25,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401512] [2020-10-14 23:35:25,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:25,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:35:25,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099229692] [2020-10-14 23:35:25,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:35:25,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:25,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:35:25,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:35:25,265 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand 18 states. [2020-10-14 23:35:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:26,447 INFO L93 Difference]: Finished difference Result 181 states and 199 transitions. [2020-10-14 23:35:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:35:26,448 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-14 23:35:26,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:26,450 INFO L225 Difference]: With dead ends: 181 [2020-10-14 23:35:26,450 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 23:35:26,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:35:26,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 23:35:26,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 152. [2020-10-14 23:35:26,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-14 23:35:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 168 transitions. [2020-10-14 23:35:26,466 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 168 transitions. Word has length 46 [2020-10-14 23:35:26,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:26,467 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 168 transitions. [2020-10-14 23:35:26,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:35:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 168 transitions. [2020-10-14 23:35:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:35:26,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:26,469 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:26,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:35:26,469 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:26,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1616038757, now seen corresponding path program 6 times [2020-10-14 23:35:26,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:26,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348769930] [2020-10-14 23:35:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:26,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:26,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:26,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:35:26,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:26,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-14 23:35:26,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:26,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:26,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:35:26,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:26,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:35:26,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:27,413 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-14 23:35:27,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:27,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:27,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:27,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:27,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:27,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:27,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:27,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:27,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:27,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:27,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:27,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:27,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348769930] [2020-10-14 23:35:27,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:27,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:35:27,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417840465] [2020-10-14 23:35:27,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:35:27,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:27,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:35:27,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:35:27,876 INFO L87 Difference]: Start difference. First operand 152 states and 168 transitions. Second operand 19 states. [2020-10-14 23:35:28,654 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-14 23:35:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:29,192 INFO L93 Difference]: Finished difference Result 178 states and 195 transitions. [2020-10-14 23:35:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:35:29,193 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-14 23:35:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:29,194 INFO L225 Difference]: With dead ends: 178 [2020-10-14 23:35:29,194 INFO L226 Difference]: Without dead ends: 159 [2020-10-14 23:35:29,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:35:29,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-14 23:35:29,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 147. [2020-10-14 23:35:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 23:35:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 162 transitions. [2020-10-14 23:35:29,205 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 162 transitions. Word has length 46 [2020-10-14 23:35:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:29,205 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 162 transitions. [2020-10-14 23:35:29,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:35:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 162 transitions. [2020-10-14 23:35:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:35:29,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:29,206 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:29,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:35:29,206 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:29,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2125941812, now seen corresponding path program 7 times [2020-10-14 23:35:29,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:29,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481992313] [2020-10-14 23:35:29,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:29,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:29,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:29,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:35:29,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:29,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-14 23:35:29,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:29,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:29,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:35:29,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:29,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:35:29,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:30,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:30,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:30,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:30,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:30,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:30,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:30,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:30,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:30,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:30,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:30,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:30,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:30,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481992313] [2020-10-14 23:35:30,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:30,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:35:30,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679496534] [2020-10-14 23:35:30,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:35:30,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:30,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:35:30,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:35:30,728 INFO L87 Difference]: Start difference. First operand 147 states and 162 transitions. Second operand 20 states. [2020-10-14 23:35:32,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:32,460 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2020-10-14 23:35:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:35:32,461 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-14 23:35:32,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:32,462 INFO L225 Difference]: With dead ends: 155 [2020-10-14 23:35:32,462 INFO L226 Difference]: Without dead ends: 149 [2020-10-14 23:35:32,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:35:32,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-14 23:35:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-10-14 23:35:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 23:35:32,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2020-10-14 23:35:32,472 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 46 [2020-10-14 23:35:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:32,472 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2020-10-14 23:35:32,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:35:32,472 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2020-10-14 23:35:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:35:32,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:32,473 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:32,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:35:32,473 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:32,474 INFO L82 PathProgramCache]: Analyzing trace with hash -187930905, now seen corresponding path program 16 times [2020-10-14 23:35:32,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:32,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490205946] [2020-10-14 23:35:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:32,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:33,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:33,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:35:33,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:33,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 496 [2020-10-14 23:35:33,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:33,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:33,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:35:33,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:33,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:35:33,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:34,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:34,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:34,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:34,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:34,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:34,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:34,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:34,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:34,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:34,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:34,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:34,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:34,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490205946] [2020-10-14 23:35:34,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:34,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:35:34,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142618057] [2020-10-14 23:35:34,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:35:34,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:34,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:35:34,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:35:34,095 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand 21 states. [2020-10-14 23:35:35,481 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-10-14 23:35:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:36,251 INFO L93 Difference]: Finished difference Result 230 states and 254 transitions. [2020-10-14 23:35:36,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:35:36,252 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-14 23:35:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:36,254 INFO L225 Difference]: With dead ends: 230 [2020-10-14 23:35:36,254 INFO L226 Difference]: Without dead ends: 226 [2020-10-14 23:35:36,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:35:36,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-14 23:35:36,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 192. [2020-10-14 23:35:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-14 23:35:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 214 transitions. [2020-10-14 23:35:36,280 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 214 transitions. Word has length 48 [2020-10-14 23:35:36,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:36,280 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 214 transitions. [2020-10-14 23:35:36,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:35:36,281 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 214 transitions. [2020-10-14 23:35:36,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:35:36,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:36,282 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:36,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:35:36,282 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:36,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:36,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1378279257, now seen corresponding path program 7 times [2020-10-14 23:35:36,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:36,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159293476] [2020-10-14 23:35:36,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:36,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:36,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:36,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:35:36,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:36,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-14 23:35:36,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:36,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:36,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:35:36,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:36,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:35:36,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:37,248 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-14 23:35:37,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:37,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:37,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:37,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:37,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:37,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:37,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:37,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:37,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:37,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:37,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:37,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:37,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159293476] [2020-10-14 23:35:37,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:37,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:35:37,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411005426] [2020-10-14 23:35:37,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:35:37,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:37,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:35:37,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:35:37,901 INFO L87 Difference]: Start difference. First operand 192 states and 214 transitions. Second operand 21 states. [2020-10-14 23:35:39,312 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-14 23:35:40,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:40,037 INFO L93 Difference]: Finished difference Result 225 states and 250 transitions. [2020-10-14 23:35:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:35:40,038 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-14 23:35:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:40,039 INFO L225 Difference]: With dead ends: 225 [2020-10-14 23:35:40,040 INFO L226 Difference]: Without dead ends: 219 [2020-10-14 23:35:40,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:35:40,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-14 23:35:40,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 201. [2020-10-14 23:35:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-14 23:35:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 225 transitions. [2020-10-14 23:35:40,059 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 225 transitions. Word has length 48 [2020-10-14 23:35:40,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:40,059 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 225 transitions. [2020-10-14 23:35:40,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:35:40,059 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 225 transitions. [2020-10-14 23:35:40,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:35:40,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:40,060 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:40,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:35:40,060 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:40,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:40,060 INFO L82 PathProgramCache]: Analyzing trace with hash -164296638, now seen corresponding path program 17 times [2020-10-14 23:35:40,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:40,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063802390] [2020-10-14 23:35:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:40,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:40,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:40,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:35:40,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:40,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 637 [2020-10-14 23:35:40,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:40,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:40,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:35:40,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:40,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:35:40,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:41,179 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-14 23:35:41,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:41,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:41,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:41,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:41,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:41,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:41,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:41,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:41,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:41,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:41,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063802390] [2020-10-14 23:35:41,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:41,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:35:41,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558104879] [2020-10-14 23:35:41,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:35:41,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:41,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:35:41,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:35:41,740 INFO L87 Difference]: Start difference. First operand 201 states and 225 transitions. Second operand 22 states. [2020-10-14 23:35:42,489 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-14 23:35:42,895 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-10-14 23:35:43,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:43,850 INFO L93 Difference]: Finished difference Result 251 states and 278 transitions. [2020-10-14 23:35:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:35:43,850 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-14 23:35:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:43,852 INFO L225 Difference]: With dead ends: 251 [2020-10-14 23:35:43,853 INFO L226 Difference]: Without dead ends: 247 [2020-10-14 23:35:43,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:35:43,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-14 23:35:43,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 213. [2020-10-14 23:35:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-14 23:35:43,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 238 transitions. [2020-10-14 23:35:43,872 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 238 transitions. Word has length 50 [2020-10-14 23:35:43,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:43,872 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 238 transitions. [2020-10-14 23:35:43,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:35:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 238 transitions. [2020-10-14 23:35:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:35:43,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:43,873 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:43,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:35:43,874 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:43,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:43,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1073397469, now seen corresponding path program 18 times [2020-10-14 23:35:43,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:43,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627216242] [2020-10-14 23:35:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:43,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:44,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:44,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:35:44,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:44,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-14 23:35:44,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:44,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:44,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:35:44,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:44,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:35:44,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:45,307 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-14 23:35:45,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:45,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:45,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:45,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:45,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:45,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:45,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:45,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:45,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:45,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:45,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:45,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:45,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627216242] [2020-10-14 23:35:45,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:45,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:35:45,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610488706] [2020-10-14 23:35:45,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:35:45,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:45,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:35:45,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:35:45,920 INFO L87 Difference]: Start difference. First operand 213 states and 238 transitions. Second operand 22 states. [2020-10-14 23:35:46,660 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2020-10-14 23:35:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:47,556 INFO L93 Difference]: Finished difference Result 253 states and 280 transitions. [2020-10-14 23:35:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:35:47,556 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-14 23:35:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:47,558 INFO L225 Difference]: With dead ends: 253 [2020-10-14 23:35:47,558 INFO L226 Difference]: Without dead ends: 227 [2020-10-14 23:35:47,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:35:47,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-14 23:35:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2020-10-14 23:35:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-14 23:35:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 197 transitions. [2020-10-14 23:35:47,572 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 197 transitions. Word has length 52 [2020-10-14 23:35:47,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:47,573 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 197 transitions. [2020-10-14 23:35:47,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:35:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 197 transitions. [2020-10-14 23:35:47,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:35:47,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:47,574 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:47,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:35:47,574 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:47,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:47,575 INFO L82 PathProgramCache]: Analyzing trace with hash -962582066, now seen corresponding path program 19 times [2020-10-14 23:35:47,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:47,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702017298] [2020-10-14 23:35:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:47,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:48,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:48,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:35:48,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:48,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-14 23:35:48,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:48,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:48,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:35:48,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:48,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:35:48,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:48,791 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-14 23:35:49,089 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-14 23:35:49,224 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-14 23:35:49,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:49,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:49,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:49,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:49,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:49,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:49,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:49,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:49,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:49,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:49,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:49,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:49,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702017298] [2020-10-14 23:35:49,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:49,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:35:49,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123815516] [2020-10-14 23:35:49,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:35:49,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:49,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:35:49,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:35:49,738 INFO L87 Difference]: Start difference. First operand 178 states and 197 transitions. Second operand 23 states. [2020-10-14 23:35:50,758 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-10-14 23:35:51,004 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2020-10-14 23:35:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:51,776 INFO L93 Difference]: Finished difference Result 272 states and 301 transitions. [2020-10-14 23:35:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:35:51,777 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-14 23:35:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:51,779 INFO L225 Difference]: With dead ends: 272 [2020-10-14 23:35:51,779 INFO L226 Difference]: Without dead ends: 268 [2020-10-14 23:35:51,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:35:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-14 23:35:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 223. [2020-10-14 23:35:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-14 23:35:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 250 transitions. [2020-10-14 23:35:51,799 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 250 transitions. Word has length 52 [2020-10-14 23:35:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:51,801 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 250 transitions. [2020-10-14 23:35:51,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:35:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 250 transitions. [2020-10-14 23:35:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:35:51,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:51,802 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:51,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:35:51,803 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:51,803 INFO L82 PathProgramCache]: Analyzing trace with hash 863152221, now seen corresponding path program 8 times [2020-10-14 23:35:51,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:51,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585487894] [2020-10-14 23:35:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:51,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:51,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:52,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:53,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:55,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:55,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:35:55,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:35:55,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3369 [2020-10-14 23:35:55,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:55,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:55,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:35:55,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:55,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:35:55,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:56,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:56,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:56,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:56,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:56,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:56,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:56,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:56,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:56,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:56,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:56,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:56,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 23:35:56,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585487894] [2020-10-14 23:35:56,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:56,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:35:56,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825174483] [2020-10-14 23:35:56,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:35:56,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:56,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:35:56,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:35:56,112 INFO L87 Difference]: Start difference. First operand 223 states and 250 transitions. Second operand 19 states. [2020-10-14 23:35:56,636 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-14 23:35:56,811 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2020-10-14 23:35:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:57,177 INFO L93 Difference]: Finished difference Result 268 states and 299 transitions. [2020-10-14 23:35:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:35:57,178 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-14 23:35:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:57,179 INFO L225 Difference]: With dead ends: 268 [2020-10-14 23:35:57,179 INFO L226 Difference]: Without dead ends: 239 [2020-10-14 23:35:57,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:35:57,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-14 23:35:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 225. [2020-10-14 23:35:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-14 23:35:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 250 transitions. [2020-10-14 23:35:57,194 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 250 transitions. Word has length 52 [2020-10-14 23:35:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:57,194 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 250 transitions. [2020-10-14 23:35:57,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:35:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 250 transitions. [2020-10-14 23:35:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:35:57,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:57,195 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:57,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:35:57,195 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:57,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:57,196 INFO L82 PathProgramCache]: Analyzing trace with hash 63586077, now seen corresponding path program 9 times [2020-10-14 23:35:57,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:57,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238372576] [2020-10-14 23:35:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:57,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:57,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:57,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:58,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:58,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:35:58,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:35:58,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1632 [2020-10-14 23:35:58,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:58,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:58,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:35:58,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:58,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:35:58,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:59,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:59,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:59,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:59,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:59,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:59,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:59,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:59,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:59,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:35:59,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238372576] [2020-10-14 23:35:59,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:59,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:35:59,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026091514] [2020-10-14 23:35:59,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:35:59,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:59,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:35:59,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:35:59,801 INFO L87 Difference]: Start difference. First operand 225 states and 250 transitions. Second operand 20 states. [2020-10-14 23:36:00,637 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-14 23:36:01,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:01,079 INFO L93 Difference]: Finished difference Result 272 states and 300 transitions. [2020-10-14 23:36:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:36:01,079 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-14 23:36:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:01,081 INFO L225 Difference]: With dead ends: 272 [2020-10-14 23:36:01,081 INFO L226 Difference]: Without dead ends: 247 [2020-10-14 23:36:01,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:36:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-14 23:36:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 227. [2020-10-14 23:36:01,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-14 23:36:01,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 250 transitions. [2020-10-14 23:36:01,096 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 250 transitions. Word has length 52 [2020-10-14 23:36:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:01,097 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 250 transitions. [2020-10-14 23:36:01,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:36:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 250 transitions. [2020-10-14 23:36:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:36:01,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:01,097 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:01,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:36:01,098 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:01,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:01,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1459303901, now seen corresponding path program 10 times [2020-10-14 23:36:01,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:01,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089653626] [2020-10-14 23:36:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:01,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:01,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:02,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:02,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:36:02,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:36:02,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1226 [2020-10-14 23:36:02,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:02,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:02,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:36:02,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:02,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:36:02,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:03,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:03,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:03,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:03,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:03,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:03,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:03,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:03,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:03,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:03,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:03,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:03,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:36:03,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089653626] [2020-10-14 23:36:03,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:03,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:36:03,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204084947] [2020-10-14 23:36:03,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:36:03,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:03,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:36:03,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:36:03,347 INFO L87 Difference]: Start difference. First operand 227 states and 250 transitions. Second operand 21 states. [2020-10-14 23:36:04,438 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-14 23:36:04,780 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2020-10-14 23:36:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:05,348 INFO L93 Difference]: Finished difference Result 256 states and 280 transitions. [2020-10-14 23:36:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:36:05,349 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-14 23:36:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:05,350 INFO L225 Difference]: With dead ends: 256 [2020-10-14 23:36:05,351 INFO L226 Difference]: Without dead ends: 235 [2020-10-14 23:36:05,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:36:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-14 23:36:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 227. [2020-10-14 23:36:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-14 23:36:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 249 transitions. [2020-10-14 23:36:05,370 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 249 transitions. Word has length 52 [2020-10-14 23:36:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:05,371 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 249 transitions. [2020-10-14 23:36:05,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:36:05,371 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 249 transitions. [2020-10-14 23:36:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:36:05,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:05,372 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:05,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 23:36:05,372 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:05,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1354075293, now seen corresponding path program 8 times [2020-10-14 23:36:05,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:05,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739171297] [2020-10-14 23:36:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:05,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:06,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:06,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:36:06,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:06,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-14 23:36:06,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:06,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:06,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:36:06,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:06,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:36:06,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:06,633 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-14 23:36:06,898 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-14 23:36:07,025 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-14 23:36:07,158 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-14 23:36:07,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:07,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:07,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:07,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:07,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:07,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:36:07,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:07,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:07,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:07,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:07,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:07,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:07,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739171297] [2020-10-14 23:36:07,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:07,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:36:07,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176767939] [2020-10-14 23:36:07,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:36:07,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:07,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:36:07,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:36:07,617 INFO L87 Difference]: Start difference. First operand 227 states and 249 transitions. Second operand 22 states. [2020-10-14 23:36:08,341 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-14 23:36:09,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:09,094 INFO L93 Difference]: Finished difference Result 253 states and 276 transitions. [2020-10-14 23:36:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:36:09,094 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-14 23:36:09,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:09,096 INFO L225 Difference]: With dead ends: 253 [2020-10-14 23:36:09,096 INFO L226 Difference]: Without dead ends: 232 [2020-10-14 23:36:09,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:36:09,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-14 23:36:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2020-10-14 23:36:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-14 23:36:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 243 transitions. [2020-10-14 23:36:09,114 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 243 transitions. Word has length 52 [2020-10-14 23:36:09,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:09,115 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 243 transitions. [2020-10-14 23:36:09,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:36:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 243 transitions. [2020-10-14 23:36:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:36:09,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:09,116 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:09,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 23:36:09,116 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:09,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:09,117 INFO L82 PathProgramCache]: Analyzing trace with hash 963511182, now seen corresponding path program 11 times [2020-10-14 23:36:09,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:09,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776500518] [2020-10-14 23:36:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:09,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:10,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:10,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:36:10,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:10,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 980 [2020-10-14 23:36:10,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:10,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:10,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:36:10,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:10,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:36:10,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:10,796 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-14 23:36:11,114 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-10-14 23:36:11,381 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-14 23:36:11,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:11,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:11,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:11,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:11,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:11,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:11,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:11,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:11,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:11,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776500518] [2020-10-14 23:36:11,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:11,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:36:11,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003539100] [2020-10-14 23:36:11,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:36:11,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:11,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:36:11,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:36:11,842 INFO L87 Difference]: Start difference. First operand 222 states and 243 transitions. Second operand 23 states. [2020-10-14 23:36:13,527 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-10-14 23:36:13,974 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 91 [2020-10-14 23:36:14,252 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2020-10-14 23:36:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:14,978 INFO L93 Difference]: Finished difference Result 257 states and 281 transitions. [2020-10-14 23:36:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:36:14,978 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-14 23:36:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:14,980 INFO L225 Difference]: With dead ends: 257 [2020-10-14 23:36:14,980 INFO L226 Difference]: Without dead ends: 251 [2020-10-14 23:36:14,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:36:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-14 23:36:15,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 233. [2020-10-14 23:36:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-14 23:36:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 256 transitions. [2020-10-14 23:36:15,004 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 256 transitions. Word has length 52 [2020-10-14 23:36:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:15,005 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 256 transitions. [2020-10-14 23:36:15,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:36:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 256 transitions. [2020-10-14 23:36:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 23:36:15,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:15,006 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:15,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 23:36:15,006 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:15,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1574720151, now seen corresponding path program 20 times [2020-10-14 23:36:15,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:15,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509782428] [2020-10-14 23:36:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:15,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:15,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:15,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 23:36:15,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:15,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 846 [2020-10-14 23:36:15,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:15,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:15,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:36:15,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:15,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:36:15,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:16,381 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-14 23:36:16,561 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-14 23:36:16,782 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2020-10-14 23:36:17,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:17,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:17,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:17,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:17,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:17,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:17,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:17,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:17,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:17,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:17,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:17,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:36:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:17,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509782428] [2020-10-14 23:36:17,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:17,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:36:17,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059270325] [2020-10-14 23:36:17,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:36:17,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:17,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:36:17,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:36:17,412 INFO L87 Difference]: Start difference. First operand 233 states and 256 transitions. Second operand 24 states. [2020-10-14 23:36:18,677 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2020-10-14 23:36:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:19,578 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2020-10-14 23:36:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:36:19,578 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-14 23:36:19,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:19,580 INFO L225 Difference]: With dead ends: 284 [2020-10-14 23:36:19,581 INFO L226 Difference]: Without dead ends: 280 [2020-10-14 23:36:19,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:36:19,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-14 23:36:19,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 256. [2020-10-14 23:36:19,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-14 23:36:19,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 281 transitions. [2020-10-14 23:36:19,606 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 281 transitions. Word has length 54 [2020-10-14 23:36:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:19,607 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 281 transitions. [2020-10-14 23:36:19,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:36:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 281 transitions. [2020-10-14 23:36:19,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 23:36:19,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:19,608 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:19,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 23:36:19,608 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:19,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1009330199, now seen corresponding path program 9 times [2020-10-14 23:36:19,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:19,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579908055] [2020-10-14 23:36:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:19,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:20,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:20,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 23:36:20,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:20,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-10-14 23:36:20,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:20,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:20,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:36:20,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:20,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:36:20,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:21,175 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-14 23:36:21,452 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-10-14 23:36:22,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:22,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:22,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:22,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:22,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:22,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:22,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:22,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:22,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:22,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579908055] [2020-10-14 23:36:22,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:22,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:36:22,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405867922] [2020-10-14 23:36:22,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:36:22,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:22,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:36:22,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:36:22,166 INFO L87 Difference]: Start difference. First operand 256 states and 281 transitions. Second operand 24 states. [2020-10-14 23:36:23,344 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-14 23:36:23,537 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 23:36:23,873 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-14 23:36:24,067 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:36:24,502 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2020-10-14 23:36:25,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:25,461 INFO L93 Difference]: Finished difference Result 280 states and 306 transitions. [2020-10-14 23:36:25,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:36:25,461 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-14 23:36:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:25,463 INFO L225 Difference]: With dead ends: 280 [2020-10-14 23:36:25,463 INFO L226 Difference]: Without dead ends: 274 [2020-10-14 23:36:25,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=184, Invalid=1978, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:36:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-14 23:36:25,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 258. [2020-10-14 23:36:25,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-14 23:36:25,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 283 transitions. [2020-10-14 23:36:25,483 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 283 transitions. Word has length 54 [2020-10-14 23:36:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:25,483 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 283 transitions. [2020-10-14 23:36:25,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:36:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 283 transitions. [2020-10-14 23:36:25,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 23:36:25,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:25,484 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:25,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 23:36:25,484 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:25,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1428900284, now seen corresponding path program 21 times [2020-10-14 23:36:25,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:25,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759076138] [2020-10-14 23:36:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:25,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:26,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:26,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 23:36:26,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:26,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 795 [2020-10-14 23:36:26,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:26,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:36:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 23:36:26,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:26,972 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-14 23:36:27,241 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-14 23:36:27,509 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-14 23:36:28,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:28,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:28,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:28,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:28,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:28,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:28,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:28,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:28,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:28,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:28,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:28,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:28,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759076138] [2020-10-14 23:36:28,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:28,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:36:28,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596362752] [2020-10-14 23:36:28,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:36:28,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:28,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:36:28,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:36:28,074 INFO L87 Difference]: Start difference. First operand 258 states and 283 transitions. Second operand 25 states. [2020-10-14 23:36:28,758 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-14 23:36:29,123 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2020-10-14 23:36:29,514 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2020-10-14 23:36:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:30,832 INFO L93 Difference]: Finished difference Result 298 states and 324 transitions. [2020-10-14 23:36:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:36:30,833 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-14 23:36:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:30,835 INFO L225 Difference]: With dead ends: 298 [2020-10-14 23:36:30,836 INFO L226 Difference]: Without dead ends: 294 [2020-10-14 23:36:30,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:36:30,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-14 23:36:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 274. [2020-10-14 23:36:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-14 23:36:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 300 transitions. [2020-10-14 23:36:30,866 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 300 transitions. Word has length 56 [2020-10-14 23:36:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:30,866 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 300 transitions. [2020-10-14 23:36:30,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:36:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 300 transitions. [2020-10-14 23:36:30,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 23:36:30,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:30,868 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:30,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 23:36:30,868 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:30,868 INFO L82 PathProgramCache]: Analyzing trace with hash 830087477, now seen corresponding path program 22 times [2020-10-14 23:36:30,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:30,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368219749] [2020-10-14 23:36:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:30,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:31,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:31,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 23:36:31,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:31,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-14 23:36:31,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:31,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:31,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:36:31,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:31,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:36:31,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:32,285 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-14 23:36:32,499 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-14 23:36:33,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:33,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:33,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:33,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:33,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:33,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:33,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:33,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:33,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:33,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:33,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:33,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:36:33,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368219749] [2020-10-14 23:36:33,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:33,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:36:33,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952664152] [2020-10-14 23:36:33,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:36:33,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:33,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:36:33,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:36:33,147 INFO L87 Difference]: Start difference. First operand 274 states and 300 transitions. Second operand 24 states. [2020-10-14 23:36:34,800 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 23:36:35,010 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 23:36:35,213 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 23:36:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:35,830 INFO L93 Difference]: Finished difference Result 303 states and 331 transitions. [2020-10-14 23:36:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:36:35,830 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-14 23:36:35,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:35,832 INFO L225 Difference]: With dead ends: 303 [2020-10-14 23:36:35,832 INFO L226 Difference]: Without dead ends: 299 [2020-10-14 23:36:35,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:36:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-14 23:36:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 275. [2020-10-14 23:36:35,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-14 23:36:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 302 transitions. [2020-10-14 23:36:35,857 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 302 transitions. Word has length 56 [2020-10-14 23:36:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:35,857 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 302 transitions. [2020-10-14 23:36:35,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:36:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 302 transitions. [2020-10-14 23:36:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 23:36:35,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:35,858 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:35,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 23:36:35,859 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:35,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:35,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1484331765, now seen corresponding path program 12 times [2020-10-14 23:36:35,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:35,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695234942] [2020-10-14 23:36:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:35,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:36,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:36,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 23:36:36,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:36,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 891 [2020-10-14 23:36:36,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:36,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:36,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:36:36,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:36,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:36:36,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:38,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:38,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:38,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:38,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:38,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:38,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:38,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:38,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:38,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:38,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:38,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:38,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:38,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695234942] [2020-10-14 23:36:38,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:38,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:36:38,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753864769] [2020-10-14 23:36:38,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:36:38,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:38,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:36:38,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:36:38,433 INFO L87 Difference]: Start difference. First operand 275 states and 302 transitions. Second operand 25 states. [2020-10-14 23:36:39,179 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-14 23:36:40,350 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-10-14 23:36:40,631 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 82 [2020-10-14 23:36:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:41,261 INFO L93 Difference]: Finished difference Result 293 states and 321 transitions. [2020-10-14 23:36:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:36:41,262 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-14 23:36:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:41,264 INFO L225 Difference]: With dead ends: 293 [2020-10-14 23:36:41,264 INFO L226 Difference]: Without dead ends: 287 [2020-10-14 23:36:41,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:36:41,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-14 23:36:41,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 277. [2020-10-14 23:36:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-14 23:36:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 304 transitions. [2020-10-14 23:36:41,294 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 304 transitions. Word has length 56 [2020-10-14 23:36:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:41,295 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 304 transitions. [2020-10-14 23:36:41,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:36:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 304 transitions. [2020-10-14 23:36:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:36:41,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:41,296 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:41,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 23:36:41,296 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:41,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:41,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1265038431, now seen corresponding path program 23 times [2020-10-14 23:36:41,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:41,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008978949] [2020-10-14 23:36:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:41,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:42,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:42,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:36:42,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:42,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 728 [2020-10-14 23:36:42,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:42,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:36:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:36:42,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:42,479 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-14 23:36:42,676 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-14 23:36:42,887 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-14 23:36:43,187 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-14 23:36:44,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:44,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:44,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:44,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:44,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:44,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:44,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:44,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:44,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:44,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:44,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:44,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:44,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008978949] [2020-10-14 23:36:44,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:44,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:36:44,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518212406] [2020-10-14 23:36:44,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:36:44,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:44,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:36:44,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:36:44,093 INFO L87 Difference]: Start difference. First operand 277 states and 304 transitions. Second operand 25 states. [2020-10-14 23:36:44,924 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 23:36:45,368 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:36:45,579 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:36:45,867 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-14 23:36:47,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:47,042 INFO L93 Difference]: Finished difference Result 321 states and 349 transitions. [2020-10-14 23:36:47,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:36:47,043 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-14 23:36:47,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:47,045 INFO L225 Difference]: With dead ends: 321 [2020-10-14 23:36:47,045 INFO L226 Difference]: Without dead ends: 277 [2020-10-14 23:36:47,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:36:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-14 23:36:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 227. [2020-10-14 23:36:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-14 23:36:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 246 transitions. [2020-10-14 23:36:47,064 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 246 transitions. Word has length 58 [2020-10-14 23:36:47,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:47,065 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 246 transitions. [2020-10-14 23:36:47,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:36:47,065 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 246 transitions. [2020-10-14 23:36:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:36:47,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:47,066 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:47,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 23:36:47,066 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:47,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:47,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1101175024, now seen corresponding path program 24 times [2020-10-14 23:36:47,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:47,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767917536] [2020-10-14 23:36:47,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:47,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:48,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:48,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:36:48,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:48,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 957 [2020-10-14 23:36:48,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:48,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:48,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:36:48,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:48,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 23:36:48,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:48,669 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-14 23:36:48,887 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-14 23:36:49,156 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-14 23:36:49,383 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-14 23:36:49,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:49,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:49,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:49,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:49,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:49,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:49,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:49,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:49,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:49,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767917536] [2020-10-14 23:36:49,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:49,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:36:49,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732888505] [2020-10-14 23:36:49,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:36:49,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:49,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:36:49,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:36:49,781 INFO L87 Difference]: Start difference. First operand 227 states and 246 transitions. Second operand 26 states. [2020-10-14 23:36:51,318 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 96 [2020-10-14 23:36:51,636 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 86 [2020-10-14 23:36:51,970 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 88 [2020-10-14 23:36:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:52,941 INFO L93 Difference]: Finished difference Result 344 states and 373 transitions. [2020-10-14 23:36:52,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:36:52,942 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-14 23:36:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:52,944 INFO L225 Difference]: With dead ends: 344 [2020-10-14 23:36:52,945 INFO L226 Difference]: Without dead ends: 340 [2020-10-14 23:36:52,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:36:52,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-14 23:36:52,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 283. [2020-10-14 23:36:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-14 23:36:52,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 311 transitions. [2020-10-14 23:36:52,972 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 311 transitions. Word has length 58 [2020-10-14 23:36:52,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:52,973 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 311 transitions. [2020-10-14 23:36:52,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:36:52,973 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 311 transitions. [2020-10-14 23:36:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:36:52,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:52,974 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:52,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 23:36:52,974 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:52,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:52,974 INFO L82 PathProgramCache]: Analyzing trace with hash 2001986911, now seen corresponding path program 13 times [2020-10-14 23:36:52,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:52,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754753369] [2020-10-14 23:36:52,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:53,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:53,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:54,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:55,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:55,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:36:55,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:36:55,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2320 [2020-10-14 23:36:55,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:55,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:55,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:36:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:36:55,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:55,788 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-14 23:36:56,006 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-14 23:36:56,313 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-14 23:36:56,466 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-14 23:36:56,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:56,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:56,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:56,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:56,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:56,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:56,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:56,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:56,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:56,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:56,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:56,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 30 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:36:56,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754753369] [2020-10-14 23:36:56,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:56,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:36:56,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600516129] [2020-10-14 23:36:56,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:36:56,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:56,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:36:56,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:36:56,966 INFO L87 Difference]: Start difference. First operand 283 states and 311 transitions. Second operand 23 states. [2020-10-14 23:36:58,078 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 75 [2020-10-14 23:36:58,334 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2020-10-14 23:36:58,605 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2020-10-14 23:36:59,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:59,280 INFO L93 Difference]: Finished difference Result 316 states and 345 transitions. [2020-10-14 23:36:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:36:59,280 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2020-10-14 23:36:59,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:59,282 INFO L225 Difference]: With dead ends: 316 [2020-10-14 23:36:59,283 INFO L226 Difference]: Without dead ends: 293 [2020-10-14 23:36:59,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:36:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-14 23:36:59,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 283. [2020-10-14 23:36:59,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-14 23:36:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 310 transitions. [2020-10-14 23:36:59,303 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 310 transitions. Word has length 58 [2020-10-14 23:36:59,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:59,303 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 310 transitions. [2020-10-14 23:36:59,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:36:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 310 transitions. [2020-10-14 23:36:59,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:36:59,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:59,305 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:59,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 23:36:59,305 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:59,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:59,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1037947873, now seen corresponding path program 14 times [2020-10-14 23:36:59,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:59,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420239880] [2020-10-14 23:36:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:59,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:59,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:00,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:00,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:37:00,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:37:00,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1399 [2020-10-14 23:37:00,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:00,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:00,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:37:00,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:00,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:37:00,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:01,426 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-14 23:37:01,689 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-14 23:37:02,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:02,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:02,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:02,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:02,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:02,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:02,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:02,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:02,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:02,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:02,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:02,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 24 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:37:02,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420239880] [2020-10-14 23:37:02,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:02,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:37:02,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728937638] [2020-10-14 23:37:02,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:37:02,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:02,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:37:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:37:02,387 INFO L87 Difference]: Start difference. First operand 283 states and 310 transitions. Second operand 24 states. [2020-10-14 23:37:03,215 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-14 23:37:03,447 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2020-10-14 23:37:03,799 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:37:04,007 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:37:04,496 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2020-10-14 23:37:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:05,320 INFO L93 Difference]: Finished difference Result 316 states and 344 transitions. [2020-10-14 23:37:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:37:05,320 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-10-14 23:37:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:05,322 INFO L225 Difference]: With dead ends: 316 [2020-10-14 23:37:05,322 INFO L226 Difference]: Without dead ends: 293 [2020-10-14 23:37:05,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:37:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-14 23:37:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 283. [2020-10-14 23:37:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-14 23:37:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 309 transitions. [2020-10-14 23:37:05,344 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 309 transitions. Word has length 58 [2020-10-14 23:37:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:05,344 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 309 transitions. [2020-10-14 23:37:05,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:37:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 309 transitions. [2020-10-14 23:37:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:37:05,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:05,345 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:05,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 23:37:05,346 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:05,346 INFO L82 PathProgramCache]: Analyzing trace with hash 916574943, now seen corresponding path program 10 times [2020-10-14 23:37:05,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:05,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638244887] [2020-10-14 23:37:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:05,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:06,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:06,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:37:06,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:06,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1082 [2020-10-14 23:37:06,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:06,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:06,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:37:06,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:06,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:37:06,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:06,860 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-14 23:37:07,113 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-14 23:37:07,391 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-14 23:37:07,525 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-14 23:37:07,666 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-14 23:37:08,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:08,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:08,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:08,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:08,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:08,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:37:08,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:08,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:08,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:08,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:08,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:08,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:37:08,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638244887] [2020-10-14 23:37:08,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:08,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:37:08,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110131018] [2020-10-14 23:37:08,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:37:08,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:08,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:37:08,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:37:08,330 INFO L87 Difference]: Start difference. First operand 283 states and 309 transitions. Second operand 25 states. [2020-10-14 23:37:09,032 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-14 23:37:09,456 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:37:09,666 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:37:09,955 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-14 23:37:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:10,945 INFO L93 Difference]: Finished difference Result 313 states and 340 transitions. [2020-10-14 23:37:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:37:10,946 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-14 23:37:10,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:10,948 INFO L225 Difference]: With dead ends: 313 [2020-10-14 23:37:10,948 INFO L226 Difference]: Without dead ends: 290 [2020-10-14 23:37:10,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:37:10,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-14 23:37:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 278. [2020-10-14 23:37:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-14 23:37:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 303 transitions. [2020-10-14 23:37:10,973 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 303 transitions. Word has length 58 [2020-10-14 23:37:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:10,973 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 303 transitions. [2020-10-14 23:37:10,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:37:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 303 transitions. [2020-10-14 23:37:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:37:10,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:10,974 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:10,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 23:37:10,975 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:10,975 INFO L82 PathProgramCache]: Analyzing trace with hash -753380976, now seen corresponding path program 15 times [2020-10-14 23:37:10,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:10,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32260057] [2020-10-14 23:37:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:11,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:11,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:11,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:37:11,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:11,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-10-14 23:37:11,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:11,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:37:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:37:11,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:12,389 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-14 23:37:12,587 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-14 23:37:12,870 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-14 23:37:13,192 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-10-14 23:37:13,390 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-10-14 23:37:13,578 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-14 23:37:14,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:14,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:14,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:14,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:14,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:14,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:14,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:14,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:14,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:14,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:14,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:14,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:37:14,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32260057] [2020-10-14 23:37:14,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:14,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:37:14,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577022186] [2020-10-14 23:37:14,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:37:14,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:14,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:37:14,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:37:14,134 INFO L87 Difference]: Start difference. First operand 278 states and 303 transitions. Second operand 26 states. [2020-10-14 23:37:15,331 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 72 [2020-10-14 23:37:15,595 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 68 [2020-10-14 23:37:16,096 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 99 [2020-10-14 23:37:16,417 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 87 [2020-10-14 23:37:16,735 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 90 [2020-10-14 23:37:17,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:17,732 INFO L93 Difference]: Finished difference Result 317 states and 345 transitions. [2020-10-14 23:37:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:37:17,733 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-14 23:37:17,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:17,735 INFO L225 Difference]: With dead ends: 317 [2020-10-14 23:37:17,735 INFO L226 Difference]: Without dead ends: 311 [2020-10-14 23:37:17,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=178, Invalid=1802, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:37:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-14 23:37:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 289. [2020-10-14 23:37:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-14 23:37:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 316 transitions. [2020-10-14 23:37:17,756 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 316 transitions. Word has length 58 [2020-10-14 23:37:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:17,756 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 316 transitions. [2020-10-14 23:37:17,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:37:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 316 transitions. [2020-10-14 23:37:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:37:17,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:17,757 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:17,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 23:37:17,758 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:17,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1618566613, now seen corresponding path program 25 times [2020-10-14 23:37:17,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:17,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627987492] [2020-10-14 23:37:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:17,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:18,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:18,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:37:18,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:18,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1096 [2020-10-14 23:37:18,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:18,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:18,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:37:18,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:18,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 23:37:18,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:19,410 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-14 23:37:19,646 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-14 23:37:19,976 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-14 23:37:20,130 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-14 23:37:20,345 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2020-10-14 23:37:21,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:21,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:21,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:21,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:21,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:21,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:21,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:21,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:21,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:21,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:21,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:21,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:37:21,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627987492] [2020-10-14 23:37:21,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:21,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:37:21,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3736852] [2020-10-14 23:37:21,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:37:21,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:21,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:37:21,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:37:21,316 INFO L87 Difference]: Start difference. First operand 289 states and 316 transitions. Second operand 27 states. [2020-10-14 23:37:22,359 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-14 23:37:22,602 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-10-14 23:37:23,057 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2020-10-14 23:37:23,358 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 78 [2020-10-14 23:37:23,809 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:37:24,114 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:37:24,760 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 104 [2020-10-14 23:37:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:26,258 INFO L93 Difference]: Finished difference Result 356 states and 386 transitions. [2020-10-14 23:37:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:37:26,259 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-14 23:37:26,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:26,261 INFO L225 Difference]: With dead ends: 356 [2020-10-14 23:37:26,261 INFO L226 Difference]: Without dead ends: 352 [2020-10-14 23:37:26,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=198, Invalid=2352, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:37:26,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-14 23:37:26,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 314. [2020-10-14 23:37:26,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-14 23:37:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 343 transitions. [2020-10-14 23:37:26,294 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 343 transitions. Word has length 60 [2020-10-14 23:37:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:26,294 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 343 transitions. [2020-10-14 23:37:26,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:37:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 343 transitions. [2020-10-14 23:37:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:37:26,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:26,295 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:26,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 23:37:26,296 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:26,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1476461205, now seen corresponding path program 11 times [2020-10-14 23:37:26,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:26,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959320466] [2020-10-14 23:37:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:26,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:27,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:27,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:37:27,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:27,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1092 [2020-10-14 23:37:27,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:27,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:27,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:37:27,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:27,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 23:37:27,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:28,178 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-14 23:37:28,452 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-14 23:37:28,792 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-14 23:37:29,016 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-14 23:37:29,235 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-10-14 23:37:29,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:29,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:29,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:29,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:29,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:29,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:29,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:29,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:29,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:37:29,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959320466] [2020-10-14 23:37:29,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:29,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:37:29,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272614295] [2020-10-14 23:37:29,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:37:29,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:29,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:37:29,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:37:29,930 INFO L87 Difference]: Start difference. First operand 314 states and 343 transitions. Second operand 27 states. [2020-10-14 23:37:31,385 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-14 23:37:31,856 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 92 [2020-10-14 23:37:33,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:33,078 INFO L93 Difference]: Finished difference Result 342 states and 372 transitions. [2020-10-14 23:37:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:37:33,079 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-14 23:37:33,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:33,081 INFO L225 Difference]: With dead ends: 342 [2020-10-14 23:37:33,081 INFO L226 Difference]: Without dead ends: 336 [2020-10-14 23:37:33,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:37:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-14 23:37:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 316. [2020-10-14 23:37:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-14 23:37:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 345 transitions. [2020-10-14 23:37:33,111 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 345 transitions. Word has length 60 [2020-10-14 23:37:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:33,111 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 345 transitions. [2020-10-14 23:37:33,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:37:33,111 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 345 transitions. [2020-10-14 23:37:33,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 23:37:33,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:33,112 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:33,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 23:37:33,113 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:33,113 INFO L82 PathProgramCache]: Analyzing trace with hash -615677306, now seen corresponding path program 26 times [2020-10-14 23:37:33,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:33,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727761745] [2020-10-14 23:37:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:33,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:34,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:34,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 23:37:34,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:34,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 994 [2020-10-14 23:37:34,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:34,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:34,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:37:34,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:34,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 23:37:34,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:35,003 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-14 23:37:35,327 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-14 23:37:35,473 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-14 23:37:35,725 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-10-14 23:37:35,895 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-14 23:37:36,083 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-14 23:37:36,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:36,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:36,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:36,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:36,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:36,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:36,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:36,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:36,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:36,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:36,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:36,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:37:37,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727761745] [2020-10-14 23:37:37,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:37,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:37:37,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840687678] [2020-10-14 23:37:37,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:37:37,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:37,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:37:37,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:37:37,026 INFO L87 Difference]: Start difference. First operand 316 states and 345 transitions. Second operand 28 states. [2020-10-14 23:37:37,847 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-14 23:37:38,360 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:37:38,610 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:37:38,958 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 23:37:39,241 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:37:39,623 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93 [2020-10-14 23:37:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:41,378 INFO L93 Difference]: Finished difference Result 372 states and 403 transitions. [2020-10-14 23:37:41,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:37:41,379 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-14 23:37:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:41,381 INFO L225 Difference]: With dead ends: 372 [2020-10-14 23:37:41,381 INFO L226 Difference]: Without dead ends: 368 [2020-10-14 23:37:41,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=143, Invalid=1837, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:37:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-10-14 23:37:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 334. [2020-10-14 23:37:41,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-14 23:37:41,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 364 transitions. [2020-10-14 23:37:41,428 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 364 transitions. Word has length 62 [2020-10-14 23:37:41,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:41,429 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 364 transitions. [2020-10-14 23:37:41,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:37:41,429 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 364 transitions. [2020-10-14 23:37:41,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 23:37:41,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:41,431 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:41,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 23:37:41,431 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:41,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:41,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1313076535, now seen corresponding path program 27 times [2020-10-14 23:37:41,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:41,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452086407] [2020-10-14 23:37:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:41,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:43,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:43,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 23:37:43,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:43,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1775 [2020-10-14 23:37:43,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:43,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:43,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:37:43,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:43,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 23:37:43,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:43,908 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-14 23:37:44,188 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-14 23:37:44,323 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-14 23:37:44,542 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2020-10-14 23:37:44,701 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-14 23:37:44,954 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-10-14 23:37:45,124 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-14 23:37:45,398 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-10-14 23:37:45,581 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-14 23:37:46,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:46,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:46,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:46,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:46,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:46,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:46,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:46,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:46,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:46,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:46,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:46,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:37:46,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452086407] [2020-10-14 23:37:46,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:46,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:37:46,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663448667] [2020-10-14 23:37:46,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:37:46,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:46,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:37:46,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:37:46,212 INFO L87 Difference]: Start difference. First operand 334 states and 364 transitions. Second operand 27 states. [2020-10-14 23:37:47,906 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-14 23:37:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:48,808 INFO L93 Difference]: Finished difference Result 377 states and 410 transitions. [2020-10-14 23:37:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:37:48,808 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-14 23:37:48,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:48,811 INFO L225 Difference]: With dead ends: 377 [2020-10-14 23:37:48,811 INFO L226 Difference]: Without dead ends: 373 [2020-10-14 23:37:48,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:37:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-14 23:37:48,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 335. [2020-10-14 23:37:48,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-10-14 23:37:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 366 transitions. [2020-10-14 23:37:48,841 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 366 transitions. Word has length 62 [2020-10-14 23:37:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:48,841 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 366 transitions. [2020-10-14 23:37:48,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:37:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 366 transitions. [2020-10-14 23:37:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 23:37:48,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:48,842 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:48,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 23:37:48,842 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:48,842 INFO L82 PathProgramCache]: Analyzing trace with hash 203857847, now seen corresponding path program 16 times [2020-10-14 23:37:48,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:48,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017220249] [2020-10-14 23:37:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:48,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:50,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:50,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 23:37:50,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:50,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1178 [2020-10-14 23:37:50,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:50,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:50,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:37:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 23:37:50,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:50,570 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-14 23:37:50,797 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-14 23:37:51,069 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-14 23:37:51,368 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-14 23:37:52,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:52,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:52,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:52,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:52,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:52,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:52,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:52,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:52,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:37:52,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017220249] [2020-10-14 23:37:52,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:52,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:37:52,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132760252] [2020-10-14 23:37:52,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:37:52,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:52,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:37:52,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:37:52,311 INFO L87 Difference]: Start difference. First operand 335 states and 366 transitions. Second operand 27 states. [2020-10-14 23:37:53,432 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-14 23:37:53,656 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 23:37:54,059 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-14 23:37:54,300 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:37:54,783 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 23:37:55,113 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 23:37:55,420 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-14 23:37:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:56,266 INFO L93 Difference]: Finished difference Result 363 states and 395 transitions. [2020-10-14 23:37:56,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:37:56,267 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-14 23:37:56,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:56,269 INFO L225 Difference]: With dead ends: 363 [2020-10-14 23:37:56,270 INFO L226 Difference]: Without dead ends: 357 [2020-10-14 23:37:56,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=192, Invalid=2064, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:37:56,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-14 23:37:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 337. [2020-10-14 23:37:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-14 23:37:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 368 transitions. [2020-10-14 23:37:56,300 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 368 transitions. Word has length 62 [2020-10-14 23:37:56,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:56,300 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 368 transitions. [2020-10-14 23:37:56,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:37:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 368 transitions. [2020-10-14 23:37:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 23:37:56,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:56,302 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:56,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 23:37:56,302 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:56,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1088272417, now seen corresponding path program 28 times [2020-10-14 23:37:56,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:56,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493435388] [2020-10-14 23:37:56,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:56,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:57,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:57,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 23:37:57,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:57,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1258 [2020-10-14 23:37:57,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:57,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:57,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:37:57,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:57,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 23:37:57,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:58,122 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-14 23:37:58,357 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-14 23:37:58,671 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-14 23:37:58,810 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-14 23:37:59,063 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-10-14 23:37:59,242 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-10-14 23:37:59,440 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-14 23:38:00,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:38:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:00,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:00,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:00,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:38:00,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:00,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:38:00,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:00,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:00,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:38:00,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:38:00,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:38:00,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 16 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:38:00,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493435388] [2020-10-14 23:38:00,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:38:00,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:38:00,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431109219] [2020-10-14 23:38:00,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:38:00,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:38:00,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:38:00,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:38:00,419 INFO L87 Difference]: Start difference. First operand 337 states and 368 transitions. Second operand 28 states. [2020-10-14 23:38:01,515 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 23:38:02,046 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:38:02,313 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:38:02,668 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 23:38:02,961 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:38:03,346 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93 [2020-10-14 23:38:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:38:05,098 INFO L93 Difference]: Finished difference Result 397 states and 430 transitions. [2020-10-14 23:38:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:38:05,099 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-14 23:38:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:38:05,101 INFO L225 Difference]: With dead ends: 397 [2020-10-14 23:38:05,101 INFO L226 Difference]: Without dead ends: 351 [2020-10-14 23:38:05,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=151, Invalid=2011, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:38:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-14 23:38:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 282. [2020-10-14 23:38:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-14 23:38:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 305 transitions. [2020-10-14 23:38:05,124 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 305 transitions. Word has length 64 [2020-10-14 23:38:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:38:05,125 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 305 transitions. [2020-10-14 23:38:05,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:38:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 305 transitions. [2020-10-14 23:38:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 23:38:05,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:38:05,126 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:38:05,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 23:38:05,126 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:38:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:38:05,126 INFO L82 PathProgramCache]: Analyzing trace with hash -805158254, now seen corresponding path program 29 times [2020-10-14 23:38:05,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:38:05,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966618199] [2020-10-14 23:38:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:38:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:05,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:06,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:06,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 23:38:06,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:06,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1430 [2020-10-14 23:38:06,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:06,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:06,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 23:38:06,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:38:06,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 23:38:06,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:07,436 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-14 23:38:07,772 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-14 23:38:07,922 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-14 23:38:08,176 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-10-14 23:38:08,451 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-14 23:38:09,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:38:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:09,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:09,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:09,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:38:09,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:09,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:38:09,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:09,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:09,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:38:09,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:38:09,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:38:09,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:38:09,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966618199] [2020-10-14 23:38:09,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:38:09,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 23:38:09,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898950305] [2020-10-14 23:38:09,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 23:38:09,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:38:09,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 23:38:09,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:38:09,507 INFO L87 Difference]: Start difference. First operand 282 states and 305 transitions. Second operand 29 states. [2020-10-14 23:38:10,817 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 23:38:11,071 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:38:11,526 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:38:11,807 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:38:11,997 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 23:38:12,312 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:38:12,659 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 23:38:12,864 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 23:38:13,325 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99