/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-optional-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:34:55,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:34:55,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:34:55,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:34:55,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:34:55,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:34:55,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:34:55,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:34:55,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:34:55,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:34:55,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:34:55,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:34:55,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:34:55,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:34:55,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:34:55,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:34:55,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:34:55,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:34:55,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:34:55,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:34:55,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:34:55,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:34:55,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:34:55,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:34:55,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:34:55,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:34:55,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:34:55,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:34:55,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:34:55,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:34:55,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:34:55,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:34:55,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:34:55,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:34:55,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:34:55,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:34:55,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:34:55,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:34:55,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:34:55,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:34:55,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:34:55,510 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 15:34:55,532 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:34:55,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:34:55,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:34:55,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:34:55,534 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:34:55,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:34:55,534 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:34:55,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:34:55,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:34:55,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:34:55,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:34:55,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:34:55,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:34:55,535 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:34:55,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:34:55,536 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:34:55,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:34:55,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:34:55,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:34:55,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:34:55,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:34:55,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:34:55,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:34:55,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:34:55,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:34:55,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:34:55,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:34:55,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:34:55,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:34:55,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:34:55,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:34:55,839 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:34:55,843 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:34:55,844 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:34:55,845 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:34:55,846 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-optional-1.i [2020-10-12 15:34:55,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a160265d4/de066533780d4b5a8896419d3deec63c/FLAGf2d26e0a6 [2020-10-12 15:34:56,440 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:34:56,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-optional-1.i [2020-10-12 15:34:56,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a160265d4/de066533780d4b5a8896419d3deec63c/FLAGf2d26e0a6 [2020-10-12 15:34:56,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a160265d4/de066533780d4b5a8896419d3deec63c [2020-10-12 15:34:56,752 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:34:56,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:34:56,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:34:56,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:34:56,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:34:56,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:34:56" (1/1) ... [2020-10-12 15:34:56,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@db9ac37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:56, skipping insertion in model container [2020-10-12 15:34:56,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:34:56" (1/1) ... [2020-10-12 15:34:56,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:34:56,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:34:57,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:34:57,288 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:34:57,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:34:57,396 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:34:57,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:57 WrapperNode [2020-10-12 15:34:57,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:34:57,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:34:57,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:34:57,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:34:57,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:57" (1/1) ... [2020-10-12 15:34:57,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:57" (1/1) ... [2020-10-12 15:34:57,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:57" (1/1) ... [2020-10-12 15:34:57,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:57" (1/1) ... [2020-10-12 15:34:57,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:57" (1/1) ... [2020-10-12 15:34:57,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:57" (1/1) ... [2020-10-12 15:34:57,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:57" (1/1) ... [2020-10-12 15:34:57,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:34:57,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:34:57,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:34:57,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:34:57,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:34:57,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:34:57,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:34:57,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:34:57,546 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:34:57,546 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:34:57,547 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:34:57,547 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:34:57,548 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:34:57,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:34:57,549 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:34:57,549 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:34:57,549 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:34:57,550 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:34:57,550 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:34:57,550 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:34:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:34:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:34:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:34:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:34:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:34:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:34:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:34:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:34:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:34:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:34:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:34:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:34:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:34:57,553 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:34:57,553 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:34:57,553 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:34:57,553 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:34:57,553 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:34:57,553 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:34:57,553 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:34:57,554 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:34:57,555 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:34:57,555 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:34:57,555 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:34:57,555 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:34:57,555 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:34:57,555 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:34:57,555 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:34:57,555 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:34:57,555 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:34:57,556 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:34:57,556 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:34:57,556 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:34:57,556 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:34:57,556 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:34:57,556 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:34:57,556 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:34:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:34:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:34:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:34:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:34:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:34:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:34:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:34:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:34:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:34:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:34:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:34:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:34:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:34:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:34:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:34:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:34:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:34:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:34:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:34:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:34:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:34:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:34:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:34:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:34:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:34:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:34:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:34:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:34:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:34:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:34:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:34:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:34:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:34:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:34:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:34:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:34:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:34:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:34:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:34:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:34:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:34:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:34:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:34:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:34:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:34:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:34:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:34:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:34:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:34:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:34:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:34:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:34:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:34:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:34:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:34:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:34:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:34:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:34:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:34:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:34:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:34:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:34:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:34:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:34:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:34:58,142 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:34:58,143 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-12 15:34:58,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:34:58 BoogieIcfgContainer [2020-10-12 15:34:58,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:34:58,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:34:58,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:34:58,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:34:58,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:34:56" (1/3) ... [2020-10-12 15:34:58,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157d757f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:34:58, skipping insertion in model container [2020-10-12 15:34:58,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:34:57" (2/3) ... [2020-10-12 15:34:58,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157d757f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:34:58, skipping insertion in model container [2020-10-12 15:34:58,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:34:58" (3/3) ... [2020-10-12 15:34:58,156 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-optional-1.i [2020-10-12 15:34:58,167 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:34:58,175 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:34:58,190 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:34:58,216 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:34:58,216 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:34:58,217 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:34:58,217 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:34:58,217 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:34:58,217 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:34:58,217 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:34:58,218 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:34:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-12 15:34:58,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 15:34:58,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:34:58,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:34:58,247 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:34:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:34:58,254 INFO L82 PathProgramCache]: Analyzing trace with hash 905993573, now seen corresponding path program 1 times [2020-10-12 15:34:58,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:34:58,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051999545] [2020-10-12 15:34:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:34:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:58,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:58,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:58,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:59,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:59,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:59,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:59,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:34:59,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:34:59,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-10-12 15:34:59,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:59,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:34:59,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:34:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:34:59,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:34:59,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:34:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:34:59,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:34:59,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:34:59,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:34:59,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:34:59,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:34:59,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:34:59,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:34:59,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:34:59,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:34:59,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:34:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:34:59,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051999545] [2020-10-12 15:34:59,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:34:59,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 15:34:59,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706394886] [2020-10-12 15:34:59,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:34:59,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:34:59,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:34:59,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:34:59,627 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 9 states. [2020-10-12 15:35:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:00,184 INFO L93 Difference]: Finished difference Result 112 states and 172 transitions. [2020-10-12 15:35:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:35:00,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-12 15:35:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:00,198 INFO L225 Difference]: With dead ends: 112 [2020-10-12 15:35:00,199 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 15:35:00,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:35:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 15:35:00,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2020-10-12 15:35:00,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 15:35:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2020-10-12 15:35:00,283 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 19 [2020-10-12 15:35:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:00,283 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2020-10-12 15:35:00,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:35:00,283 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2020-10-12 15:35:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:35:00,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:00,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:00,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:35:00,285 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:00,286 INFO L82 PathProgramCache]: Analyzing trace with hash 548970733, now seen corresponding path program 1 times [2020-10-12 15:35:00,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:00,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909805728] [2020-10-12 15:35:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:00,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:00,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:00,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:35:00,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:00,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-12 15:35:00,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:00,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:35:00,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:00,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:35:00,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:00,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:00,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:00,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:00,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:00,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:00,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:35:00,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:00,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:00,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:00,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:00,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:00,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909805728] [2020-10-12 15:35:00,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:35:00,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 15:35:00,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809013331] [2020-10-12 15:35:00,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:35:00,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:00,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:35:00,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:35:00,570 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand 8 states. [2020-10-12 15:35:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:00,939 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2020-10-12 15:35:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:35:00,939 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-12 15:35:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:00,941 INFO L225 Difference]: With dead ends: 75 [2020-10-12 15:35:00,941 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:35:00,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:35:00,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:35:00,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 40. [2020-10-12 15:35:00,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 15:35:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-12 15:35:00,952 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 20 [2020-10-12 15:35:00,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:00,953 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-12 15:35:00,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:35:00,953 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-12 15:35:00,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:35:00,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:00,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:00,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:35:00,955 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:00,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:00,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1969142159, now seen corresponding path program 1 times [2020-10-12 15:35:00,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:00,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097571996] [2020-10-12 15:35:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:00,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:01,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:01,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:01,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:01,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:35:01,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:35:01,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-12 15:35:01,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:01,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:35:01,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:01,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:35:01,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:35:01,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:01,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:01,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:01,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:01,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:01,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:35:01,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:01,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:01,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:01,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:01,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:01,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097571996] [2020-10-12 15:35:01,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:35:01,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 15:35:01,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894369914] [2020-10-12 15:35:01,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:35:01,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:01,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:35:01,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:35:01,464 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 9 states. [2020-10-12 15:35:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:01,759 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2020-10-12 15:35:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:35:01,759 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-12 15:35:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:01,761 INFO L225 Difference]: With dead ends: 71 [2020-10-12 15:35:01,761 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 15:35:01,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:35:01,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 15:35:01,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-10-12 15:35:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 15:35:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-10-12 15:35:01,770 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2020-10-12 15:35:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:01,770 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-10-12 15:35:01,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:35:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-10-12 15:35:01,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 15:35:01,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:01,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:01,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:35:01,772 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2019097607, now seen corresponding path program 1 times [2020-10-12 15:35:01,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:01,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335546955] [2020-10-12 15:35:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:01,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:01,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:01,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:02,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:02,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:02,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 15:35:02,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:35:02,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-12 15:35:02,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:02,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:35:02,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 15:35:02,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:35:02,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:02,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:02,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:02,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:02,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:02,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:02,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:35:02,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:02,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:02,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:02,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:02,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:02,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335546955] [2020-10-12 15:35:02,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:35:02,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:35:02,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665600345] [2020-10-12 15:35:02,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:35:02,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:02,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:35:02,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:35:02,211 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 7 states. [2020-10-12 15:35:02,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:02,539 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-12 15:35:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:35:02,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-12 15:35:02,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:02,541 INFO L225 Difference]: With dead ends: 53 [2020-10-12 15:35:02,542 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 15:35:02,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:35:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 15:35:02,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2020-10-12 15:35:02,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:35:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-12 15:35:02,565 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 21 [2020-10-12 15:35:02,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:02,566 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-12 15:35:02,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:35:02,566 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-12 15:35:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 15:35:02,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:02,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:02,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:35:02,569 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:02,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:02,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2020944649, now seen corresponding path program 1 times [2020-10-12 15:35:02,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:02,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668773142] [2020-10-12 15:35:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:02,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:02,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:02,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:02,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:03,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:03,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 15:35:03,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:35:03,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-10-12 15:35:03,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:03,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:35:03,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:03,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:35:03,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 25 [2020-10-12 15:35:03,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:03,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:03,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:03,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:03,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:03,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:35:03,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:03,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:03,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:03,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:03,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:03,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668773142] [2020-10-12 15:35:03,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:35:03,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 15:35:03,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461840239] [2020-10-12 15:35:03,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:35:03,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:03,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:35:03,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:35:03,417 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 8 states. [2020-10-12 15:35:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:03,825 INFO L93 Difference]: Finished difference Result 114 states and 148 transitions. [2020-10-12 15:35:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:35:03,825 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-12 15:35:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:03,827 INFO L225 Difference]: With dead ends: 114 [2020-10-12 15:35:03,827 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 15:35:03,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:35:03,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 15:35:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 50. [2020-10-12 15:35:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 15:35:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-10-12 15:35:03,837 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 21 [2020-10-12 15:35:03,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:03,838 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-10-12 15:35:03,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:35:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-10-12 15:35:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 15:35:03,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:03,839 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] [2020-10-12 15:35:03,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:35:03,840 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:03,841 INFO L82 PathProgramCache]: Analyzing trace with hash 61652601, now seen corresponding path program 1 times [2020-10-12 15:35:03,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:03,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411908134] [2020-10-12 15:35:03,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:03,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:04,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:04,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:35:04,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:04,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 925 [2020-10-12 15:35:04,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:04,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:35:04,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:04,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:35:04,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:35:05,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:05,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:05,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:05,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:05,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:05,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:35:05,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:05,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:05,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:05,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:05,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:35:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:05,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411908134] [2020-10-12 15:35:05,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:05,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:35:05,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073996795] [2020-10-12 15:35:05,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:35:05,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:05,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:35:05,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:35:05,196 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 11 states. [2020-10-12 15:35:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:06,132 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2020-10-12 15:35:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:35:06,133 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-12 15:35:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:06,135 INFO L225 Difference]: With dead ends: 117 [2020-10-12 15:35:06,135 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 15:35:06,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:35:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 15:35:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 60. [2020-10-12 15:35:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 15:35:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2020-10-12 15:35:06,147 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 23 [2020-10-12 15:35:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:06,148 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2020-10-12 15:35:06,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:35:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2020-10-12 15:35:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 15:35:06,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:06,149 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] [2020-10-12 15:35:06,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:35:06,150 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:06,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:06,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1838507005, now seen corresponding path program 1 times [2020-10-12 15:35:06,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:06,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834349587] [2020-10-12 15:35:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:06,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:06,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:06,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:07,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:07,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:35:07,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:35:07,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1254 [2020-10-12 15:35:07,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:07,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:35:07,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:07,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:35:07,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:07,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:07,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:07,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:07,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:07,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:07,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:35:07,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:07,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:07,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:07,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:07,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:07,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834349587] [2020-10-12 15:35:07,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:07,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:35:07,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123323127] [2020-10-12 15:35:07,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:35:07,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:07,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:35:07,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:35:07,663 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand 11 states. [2020-10-12 15:35:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:08,278 INFO L93 Difference]: Finished difference Result 139 states and 181 transitions. [2020-10-12 15:35:08,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:35:08,279 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-12 15:35:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:08,280 INFO L225 Difference]: With dead ends: 139 [2020-10-12 15:35:08,280 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 15:35:08,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:35:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 15:35:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 67. [2020-10-12 15:35:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 15:35:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-10-12 15:35:08,291 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 23 [2020-10-12 15:35:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:08,291 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-10-12 15:35:08,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:35:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-10-12 15:35:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:35:08,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:08,293 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] [2020-10-12 15:35:08,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:35:08,293 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:08,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:08,294 INFO L82 PathProgramCache]: Analyzing trace with hash -910858055, now seen corresponding path program 1 times [2020-10-12 15:35:08,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:08,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755780120] [2020-10-12 15:35:08,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:08,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:08,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:08,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:09,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:09,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:35:09,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:35:09,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 882 [2020-10-12 15:35:09,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:09,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:35:09,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:09,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:35:09,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:09,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:09,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:09,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:09,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:09,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:09,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:35:09,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:09,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:09,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:09,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:09,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:35:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:09,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755780120] [2020-10-12 15:35:09,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:09,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:35:09,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251045406] [2020-10-12 15:35:09,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:35:09,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:09,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:35:09,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:35:09,380 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 12 states. [2020-10-12 15:35:09,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:09,868 INFO L93 Difference]: Finished difference Result 115 states and 148 transitions. [2020-10-12 15:35:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:35:09,869 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-12 15:35:09,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:09,870 INFO L225 Difference]: With dead ends: 115 [2020-10-12 15:35:09,870 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 15:35:09,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:35:09,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 15:35:09,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2020-10-12 15:35:09,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:35:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2020-10-12 15:35:09,883 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 24 [2020-10-12 15:35:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:09,886 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-10-12 15:35:09,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:35:09,886 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2020-10-12 15:35:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:35:09,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:09,889 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] [2020-10-12 15:35:09,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:35:09,889 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:09,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1799525935, now seen corresponding path program 1 times [2020-10-12 15:35:09,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:09,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295607199] [2020-10-12 15:35:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:09,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:10,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:10,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:10,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:10,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:11,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:11,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:11,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:12,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:12,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:35:12,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:35:12,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2283 [2020-10-12 15:35:12,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:12,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:35:12,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:12,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:35:12,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:12,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:12,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:12,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:12,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:12,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:12,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:35:12,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:12,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:12,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:12,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:12,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:12,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295607199] [2020-10-12 15:35:12,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:12,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:35:12,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787750272] [2020-10-12 15:35:12,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:35:12,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:12,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:35:12,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:35:12,468 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 12 states. [2020-10-12 15:35:14,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:14,715 INFO L93 Difference]: Finished difference Result 183 states and 237 transitions. [2020-10-12 15:35:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 15:35:14,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-12 15:35:14,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:14,718 INFO L225 Difference]: With dead ends: 183 [2020-10-12 15:35:14,719 INFO L226 Difference]: Without dead ends: 166 [2020-10-12 15:35:14,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=504, Invalid=1566, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:35:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-12 15:35:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 66. [2020-10-12 15:35:14,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 15:35:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2020-10-12 15:35:14,729 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 24 [2020-10-12 15:35:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:14,730 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2020-10-12 15:35:14,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:35:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2020-10-12 15:35:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:35:14,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:14,731 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] [2020-10-12 15:35:14,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:35:14,732 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:14,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:14,732 INFO L82 PathProgramCache]: Analyzing trace with hash -718586957, now seen corresponding path program 1 times [2020-10-12 15:35:14,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:14,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79113661] [2020-10-12 15:35:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:14,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:14,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:14,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:35:14,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:14,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-12 15:35:14,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:14,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:35:14,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:14,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:35:14,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:15,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:15,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:15,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:15,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:15,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:15,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:35:15,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:15,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:15,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:15,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79113661] [2020-10-12 15:35:15,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:15,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:35:15,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155241553] [2020-10-12 15:35:15,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:35:15,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:15,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:35:15,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:35:15,191 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand 10 states. [2020-10-12 15:35:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:15,783 INFO L93 Difference]: Finished difference Result 114 states and 148 transitions. [2020-10-12 15:35:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:35:15,784 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-12 15:35:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:15,785 INFO L225 Difference]: With dead ends: 114 [2020-10-12 15:35:15,785 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 15:35:15,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:35:15,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 15:35:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 67. [2020-10-12 15:35:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 15:35:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2020-10-12 15:35:15,795 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 24 [2020-10-12 15:35:15,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:15,795 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2020-10-12 15:35:15,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:35:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2020-10-12 15:35:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:35:15,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:15,797 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:15,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:35:15,797 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1537852882, now seen corresponding path program 1 times [2020-10-12 15:35:15,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:15,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969705281] [2020-10-12 15:35:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:15,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:15,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:15,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:35:15,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:15,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-12 15:35:15,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:15,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:35:15,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:15,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:35:15,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:15,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:15,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:15,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:15,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:15,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:15,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:15,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:15,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:15,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:15,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:15,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:15,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969705281] [2020-10-12 15:35:15,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:15,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 15:35:15,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112975811] [2020-10-12 15:35:15,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:35:15,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:15,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:35:15,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:35:15,964 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand 7 states. [2020-10-12 15:35:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:16,171 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2020-10-12 15:35:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:35:16,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-12 15:35:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:16,172 INFO L225 Difference]: With dead ends: 100 [2020-10-12 15:35:16,172 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 15:35:16,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:35:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 15:35:16,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-12 15:35:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 15:35:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2020-10-12 15:35:16,181 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 30 [2020-10-12 15:35:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:16,181 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2020-10-12 15:35:16,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:35:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2020-10-12 15:35:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:35:16,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:16,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:16,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:35:16,183 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:16,184 INFO L82 PathProgramCache]: Analyzing trace with hash 648427744, now seen corresponding path program 1 times [2020-10-12 15:35:16,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:16,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762146343] [2020-10-12 15:35:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:16,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:16,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:16,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:16,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:16,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:17,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:19,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:19,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:35:19,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:35:19,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3616 [2020-10-12 15:35:19,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:19,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:35:19,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:19,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:35:19,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:20,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:20,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:20,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:20,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:20,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:20,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:35:20,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:20,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:20,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:20,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:20,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:35:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:20,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762146343] [2020-10-12 15:35:20,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:20,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:35:20,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246017407] [2020-10-12 15:35:20,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:35:20,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:20,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:35:20,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:35:20,140 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand 12 states. [2020-10-12 15:35:21,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:21,018 INFO L93 Difference]: Finished difference Result 139 states and 180 transitions. [2020-10-12 15:35:21,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:35:21,021 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-12 15:35:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:21,022 INFO L225 Difference]: With dead ends: 139 [2020-10-12 15:35:21,022 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 15:35:21,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:35:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 15:35:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 81. [2020-10-12 15:35:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 15:35:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-10-12 15:35:21,041 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 33 [2020-10-12 15:35:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:21,042 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-10-12 15:35:21,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:35:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-10-12 15:35:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:35:21,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:21,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:21,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:35:21,044 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1869685148, now seen corresponding path program 1 times [2020-10-12 15:35:21,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:21,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395317159] [2020-10-12 15:35:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:21,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:21,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:21,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:21,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:21,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:21,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:21,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:22,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:22,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:24,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:24,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:25,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:26,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:26,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:35:26,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 15:35:26,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 15:35:26,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:26,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:35:26,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:26,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:35:26,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:26,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:26,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:26,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:26,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:26,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:26,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:26,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:26,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:26,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:26,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:35:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:26,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395317159] [2020-10-12 15:35:26,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:26,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:35:26,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611895219] [2020-10-12 15:35:26,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:35:26,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:26,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:35:26,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:35:26,273 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 12 states. [2020-10-12 15:35:27,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:27,037 INFO L93 Difference]: Finished difference Result 171 states and 221 transitions. [2020-10-12 15:35:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:35:27,037 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-12 15:35:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:27,039 INFO L225 Difference]: With dead ends: 171 [2020-10-12 15:35:27,040 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 15:35:27,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:35:27,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 15:35:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 102. [2020-10-12 15:35:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 15:35:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2020-10-12 15:35:27,069 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 33 [2020-10-12 15:35:27,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:27,069 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2020-10-12 15:35:27,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:35:27,069 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2020-10-12 15:35:27,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:35:27,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:27,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:27,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:35:27,071 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:27,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:27,071 INFO L82 PathProgramCache]: Analyzing trace with hash 795682848, now seen corresponding path program 1 times [2020-10-12 15:35:27,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:27,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580567205] [2020-10-12 15:35:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:27,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:27,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:27,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:27,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:27,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:27,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:27,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:27,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:27,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:28,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:28,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:29,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:29,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:35:29,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:35:29,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2833 [2020-10-12 15:35:29,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:29,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:35:29,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:35:29,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:35:29,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:30,445 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 50 [2020-10-12 15:35:30,657 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2020-10-12 15:35:31,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:31,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:31,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:31,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:31,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:31,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:35:31,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:31,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:31,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:31,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:31,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:31,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580567205] [2020-10-12 15:35:31,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:31,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:35:31,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312691613] [2020-10-12 15:35:31,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:35:31,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:31,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:35:31,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:35:31,087 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand 14 states. [2020-10-12 15:35:31,424 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-12 15:35:31,919 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-12 15:35:32,197 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2020-10-12 15:35:32,591 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2020-10-12 15:35:33,143 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2020-10-12 15:35:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:34,073 INFO L93 Difference]: Finished difference Result 260 states and 331 transitions. [2020-10-12 15:35:34,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 15:35:34,073 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-12 15:35:34,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:34,075 INFO L225 Difference]: With dead ends: 260 [2020-10-12 15:35:34,075 INFO L226 Difference]: Without dead ends: 258 [2020-10-12 15:35:34,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:35:34,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-12 15:35:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 112. [2020-10-12 15:35:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 15:35:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 146 transitions. [2020-10-12 15:35:34,095 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 146 transitions. Word has length 34 [2020-10-12 15:35:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:34,095 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 146 transitions. [2020-10-12 15:35:34,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:35:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 146 transitions. [2020-10-12 15:35:34,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:35:34,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:34,097 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:34,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:35:34,097 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:34,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:34,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2075546526, now seen corresponding path program 1 times [2020-10-12 15:35:34,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:34,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667119648] [2020-10-12 15:35:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:34,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:34,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:34,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:34,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:34,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:34,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:34,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:35:34,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:35:34,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 710 [2020-10-12 15:35:34,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:34,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:35:34,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:34,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:35:34,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:35,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:35,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:35,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:35,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:35,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:35,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:35,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:35,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:35,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667119648] [2020-10-12 15:35:35,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:35,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:35:35,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595670682] [2020-10-12 15:35:35,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:35:35,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:35,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:35:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:35:35,149 INFO L87 Difference]: Start difference. First operand 112 states and 146 transitions. Second operand 13 states. [2020-10-12 15:35:37,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:37,205 INFO L93 Difference]: Finished difference Result 237 states and 301 transitions. [2020-10-12 15:35:37,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 15:35:37,206 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-12 15:35:37,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:37,209 INFO L225 Difference]: With dead ends: 237 [2020-10-12 15:35:37,209 INFO L226 Difference]: Without dead ends: 235 [2020-10-12 15:35:37,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=345, Invalid=1137, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:35:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-12 15:35:37,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 142. [2020-10-12 15:35:37,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-12 15:35:37,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 182 transitions. [2020-10-12 15:35:37,230 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 182 transitions. Word has length 34 [2020-10-12 15:35:37,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:37,230 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 182 transitions. [2020-10-12 15:35:37,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:35:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 182 transitions. [2020-10-12 15:35:37,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:35:37,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:37,232 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:37,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:35:37,232 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:37,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1390838442, now seen corresponding path program 1 times [2020-10-12 15:35:37,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:37,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729033721] [2020-10-12 15:35:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:37,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:37,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:37,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:37,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:37,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:37,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:37,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:37,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:37,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:37,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:38,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:38,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:39,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:39,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:39,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:39,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:39,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:35:39,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 15:35:39,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2731 [2020-10-12 15:35:39,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:39,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:35:39,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:35:39,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:35:39,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:40,305 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-10-12 15:35:40,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:40,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:40,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:40,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:40,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:40,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:40,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:40,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:40,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729033721] [2020-10-12 15:35:40,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:40,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:35:40,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524710105] [2020-10-12 15:35:40,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:35:40,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:40,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:35:40,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:35:40,603 INFO L87 Difference]: Start difference. First operand 142 states and 182 transitions. Second operand 14 states. [2020-10-12 15:35:41,989 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-12 15:35:42,542 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-12 15:35:43,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:43,902 INFO L93 Difference]: Finished difference Result 339 states and 428 transitions. [2020-10-12 15:35:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 15:35:43,902 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-12 15:35:43,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:43,906 INFO L225 Difference]: With dead ends: 339 [2020-10-12 15:35:43,906 INFO L226 Difference]: Without dead ends: 337 [2020-10-12 15:35:43,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 15:35:43,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-12 15:35:43,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 146. [2020-10-12 15:35:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 15:35:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 188 transitions. [2020-10-12 15:35:43,928 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 188 transitions. Word has length 35 [2020-10-12 15:35:43,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:43,928 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 188 transitions. [2020-10-12 15:35:43,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:35:43,929 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 188 transitions. [2020-10-12 15:35:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:35:43,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:43,930 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:43,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:35:43,930 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:43,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:43,930 INFO L82 PathProgramCache]: Analyzing trace with hash 804032428, now seen corresponding path program 1 times [2020-10-12 15:35:43,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:43,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10025230] [2020-10-12 15:35:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:43,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:43,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:43,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:44,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:44,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:44,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:44,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:35:44,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:35:44,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-10-12 15:35:44,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:44,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:35:44,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:35:44,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:35:44,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:45,298 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2020-10-12 15:35:45,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:45,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:45,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:45,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:45,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:45,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:35:45,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:45,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:45,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:45,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:45,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:35:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:45,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10025230] [2020-10-12 15:35:45,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:45,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:35:45,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881898286] [2020-10-12 15:35:45,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:35:45,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:45,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:35:45,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:35:45,483 INFO L87 Difference]: Start difference. First operand 146 states and 188 transitions. Second operand 12 states. [2020-10-12 15:35:45,949 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-12 15:35:46,316 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-12 15:35:46,485 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-12 15:35:46,855 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-12 15:35:47,048 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-10-12 15:35:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:47,453 INFO L93 Difference]: Finished difference Result 327 states and 415 transitions. [2020-10-12 15:35:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:35:47,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-12 15:35:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:47,455 INFO L225 Difference]: With dead ends: 327 [2020-10-12 15:35:47,455 INFO L226 Difference]: Without dead ends: 325 [2020-10-12 15:35:47,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:35:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-12 15:35:47,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 157. [2020-10-12 15:35:47,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 15:35:47,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 203 transitions. [2020-10-12 15:35:47,479 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 203 transitions. Word has length 35 [2020-10-12 15:35:47,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:47,480 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 203 transitions. [2020-10-12 15:35:47,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:35:47,480 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 203 transitions. [2020-10-12 15:35:47,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:35:47,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:47,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:47,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:35:47,481 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:47,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:47,481 INFO L82 PathProgramCache]: Analyzing trace with hash -784315474, now seen corresponding path program 1 times [2020-10-12 15:35:47,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:47,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843655744] [2020-10-12 15:35:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:47,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:47,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:47,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:47,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:35:47,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:35:47,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-12 15:35:47,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:47,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:35:47,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:47,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:35:47,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:47,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:47,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:47,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:47,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:47,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:47,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:35:47,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:47,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:47,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:47,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843655744] [2020-10-12 15:35:47,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:47,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:35:47,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092190511] [2020-10-12 15:35:47,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:35:47,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:47,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:35:47,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:35:47,962 INFO L87 Difference]: Start difference. First operand 157 states and 203 transitions. Second operand 10 states. [2020-10-12 15:35:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:48,743 INFO L93 Difference]: Finished difference Result 224 states and 287 transitions. [2020-10-12 15:35:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:35:48,744 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-12 15:35:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:48,745 INFO L225 Difference]: With dead ends: 224 [2020-10-12 15:35:48,746 INFO L226 Difference]: Without dead ends: 222 [2020-10-12 15:35:48,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:35:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-12 15:35:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 136. [2020-10-12 15:35:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-12 15:35:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2020-10-12 15:35:48,770 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 35 [2020-10-12 15:35:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:48,770 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2020-10-12 15:35:48,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:35:48,770 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2020-10-12 15:35:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:35:48,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:48,772 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:48,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:35:48,772 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:48,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:48,772 INFO L82 PathProgramCache]: Analyzing trace with hash 844729302, now seen corresponding path program 1 times [2020-10-12 15:35:48,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:48,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299379946] [2020-10-12 15:35:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:48,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:48,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:49,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:49,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:49,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:49,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:53,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:53,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:35:53,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:35:53,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4641 [2020-10-12 15:35:53,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:53,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:35:53,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:35:53,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:35:53,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:53,708 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-12 15:35:53,850 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-12 15:35:54,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:35:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:54,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:54,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:35:54,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:35:54,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:35:54,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:35:54,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:35:54,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:35:54,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:35:54,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:35:54,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:35:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:35:54,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299379946] [2020-10-12 15:35:54,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:35:54,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:35:54,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568673150] [2020-10-12 15:35:54,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:35:54,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:35:54,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:35:54,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:35:54,103 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand 13 states. [2020-10-12 15:35:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:35:55,320 INFO L93 Difference]: Finished difference Result 290 states and 376 transitions. [2020-10-12 15:35:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:35:55,321 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-12 15:35:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:35:55,324 INFO L225 Difference]: With dead ends: 290 [2020-10-12 15:35:55,324 INFO L226 Difference]: Without dead ends: 257 [2020-10-12 15:35:55,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:35:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-12 15:35:55,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 170. [2020-10-12 15:35:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-12 15:35:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 222 transitions. [2020-10-12 15:35:55,351 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 222 transitions. Word has length 36 [2020-10-12 15:35:55,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:35:55,351 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 222 transitions. [2020-10-12 15:35:55,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:35:55,352 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 222 transitions. [2020-10-12 15:35:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:35:55,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:35:55,353 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:35:55,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:35:55,353 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:35:55,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:35:55,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1673383590, now seen corresponding path program 1 times [2020-10-12 15:35:55,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:35:55,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565450029] [2020-10-12 15:35:55,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:35:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:35:55,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:55,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:55,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:55,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:55,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:56,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:56,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:56,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:57,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:59,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:35:59,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:00,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:00,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:00,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:36:00,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 15:36:00,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 15:36:00,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:36:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:36:00,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:00,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:00,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:00,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:00,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:00,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:00,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:00,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:00,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:00,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:00,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:00,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:00,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565450029] [2020-10-12 15:36:00,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:00,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:36:00,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038426314] [2020-10-12 15:36:00,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:36:00,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:00,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:36:00,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:36:00,598 INFO L87 Difference]: Start difference. First operand 170 states and 222 transitions. Second operand 14 states. [2020-10-12 15:36:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:01,460 INFO L93 Difference]: Finished difference Result 368 states and 477 transitions. [2020-10-12 15:36:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:36:01,461 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-12 15:36:01,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:01,463 INFO L225 Difference]: With dead ends: 368 [2020-10-12 15:36:01,463 INFO L226 Difference]: Without dead ends: 335 [2020-10-12 15:36:01,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:36:01,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-12 15:36:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 194. [2020-10-12 15:36:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-12 15:36:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 254 transitions. [2020-10-12 15:36:01,491 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 254 transitions. Word has length 36 [2020-10-12 15:36:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:01,491 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 254 transitions. [2020-10-12 15:36:01,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:36:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 254 transitions. [2020-10-12 15:36:01,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:36:01,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:01,492 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:36:01,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:36:01,492 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:01,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:01,493 INFO L82 PathProgramCache]: Analyzing trace with hash -532670310, now seen corresponding path program 1 times [2020-10-12 15:36:01,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:01,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911804462] [2020-10-12 15:36:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:01,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:01,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:01,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:01,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:02,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:02,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:02,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:02,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:02,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:05,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:06,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:06,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:06,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:36:06,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:36:06,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 15:36:06,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:06,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:36:06,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:06,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:36:06,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:36:07,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:07,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:07,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:07,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:07,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:07,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:07,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:07,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:07,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:07,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911804462] [2020-10-12 15:36:07,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:07,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:36:07,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092028158] [2020-10-12 15:36:07,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:36:07,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:07,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:36:07,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:36:07,198 INFO L87 Difference]: Start difference. First operand 194 states and 254 transitions. Second operand 16 states. [2020-10-12 15:36:07,948 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-12 15:36:08,333 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-12 15:36:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:09,555 INFO L93 Difference]: Finished difference Result 446 states and 574 transitions. [2020-10-12 15:36:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 15:36:09,556 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-12 15:36:09,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:09,558 INFO L225 Difference]: With dead ends: 446 [2020-10-12 15:36:09,559 INFO L226 Difference]: Without dead ends: 387 [2020-10-12 15:36:09,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=379, Invalid=1691, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:36:09,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-12 15:36:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 224. [2020-10-12 15:36:09,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-12 15:36:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 294 transitions. [2020-10-12 15:36:09,592 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 294 transitions. Word has length 37 [2020-10-12 15:36:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:09,592 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 294 transitions. [2020-10-12 15:36:09,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:36:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 294 transitions. [2020-10-12 15:36:09,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:36:09,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:09,593 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:36:09,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:36:09,594 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:09,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:09,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1244184094, now seen corresponding path program 1 times [2020-10-12 15:36:09,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:09,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137449692] [2020-10-12 15:36:09,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:09,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:09,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:09,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:09,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:10,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:10,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:10,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:13,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:13,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:14,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:14,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:36:14,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:36:14,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:36:14,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:14,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:36:14,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:14,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:36:14,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:14,895 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-12 15:36:15,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:15,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:15,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:15,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:15,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:15,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:15,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:15,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:15,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:15,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:15,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:36:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:15,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137449692] [2020-10-12 15:36:15,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:15,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:36:15,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859456905] [2020-10-12 15:36:15,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:36:15,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:15,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:36:15,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:36:15,096 INFO L87 Difference]: Start difference. First operand 224 states and 294 transitions. Second operand 16 states. [2020-10-12 15:36:16,124 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-12 15:36:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:17,518 INFO L93 Difference]: Finished difference Result 457 states and 570 transitions. [2020-10-12 15:36:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 15:36:17,521 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-12 15:36:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:17,523 INFO L225 Difference]: With dead ends: 457 [2020-10-12 15:36:17,524 INFO L226 Difference]: Without dead ends: 455 [2020-10-12 15:36:17,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=384, Invalid=1596, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 15:36:17,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-12 15:36:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 240. [2020-10-12 15:36:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-12 15:36:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 318 transitions. [2020-10-12 15:36:17,565 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 318 transitions. Word has length 37 [2020-10-12 15:36:17,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:17,565 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 318 transitions. [2020-10-12 15:36:17,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:36:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 318 transitions. [2020-10-12 15:36:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:36:17,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:17,567 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:36:17,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:36:17,567 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:17,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:17,568 INFO L82 PathProgramCache]: Analyzing trace with hash -470630696, now seen corresponding path program 1 times [2020-10-12 15:36:17,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:17,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989739986] [2020-10-12 15:36:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:17,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:17,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:17,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:17,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:18,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:18,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:18,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:19,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:19,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:22,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:22,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:36:22,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:36:22,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 15:36:22,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:22,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:36:22,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:22,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:36:22,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:23,062 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-12 15:36:23,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:23,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:23,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:23,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:23,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:23,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:23,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:23,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:23,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:23,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:23,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:23,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989739986] [2020-10-12 15:36:23,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:23,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:36:23,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673604039] [2020-10-12 15:36:23,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:36:23,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:36:23,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:36:23,534 INFO L87 Difference]: Start difference. First operand 240 states and 318 transitions. Second operand 15 states. [2020-10-12 15:36:24,413 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-12 15:36:24,838 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-12 15:36:25,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:25,836 INFO L93 Difference]: Finished difference Result 421 states and 540 transitions. [2020-10-12 15:36:25,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:36:25,836 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-12 15:36:25,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:25,839 INFO L225 Difference]: With dead ends: 421 [2020-10-12 15:36:25,840 INFO L226 Difference]: Without dead ends: 419 [2020-10-12 15:36:25,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:36:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2020-10-12 15:36:25,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 245. [2020-10-12 15:36:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-12 15:36:25,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 324 transitions. [2020-10-12 15:36:25,881 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 324 transitions. Word has length 37 [2020-10-12 15:36:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:25,881 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 324 transitions. [2020-10-12 15:36:25,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:36:25,882 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 324 transitions. [2020-10-12 15:36:25,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:36:25,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:25,883 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:36:25,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:36:25,883 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:25,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:25,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1465715246, now seen corresponding path program 1 times [2020-10-12 15:36:25,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:25,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079833750] [2020-10-12 15:36:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:25,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:25,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:26,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:26,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:26,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:26,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:27,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:27,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:36:27,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:36:27,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1691 [2020-10-12 15:36:27,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:27,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:36:27,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:27,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:36:27,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:28,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:28,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:28,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:28,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:28,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:28,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:28,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:28,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:28,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079833750] [2020-10-12 15:36:28,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:28,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:36:28,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113076075] [2020-10-12 15:36:28,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:36:28,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:28,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:36:28,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:36:28,055 INFO L87 Difference]: Start difference. First operand 245 states and 324 transitions. Second operand 13 states. [2020-10-12 15:36:29,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:29,294 INFO L93 Difference]: Finished difference Result 380 states and 494 transitions. [2020-10-12 15:36:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:36:29,294 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-12 15:36:29,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:29,297 INFO L225 Difference]: With dead ends: 380 [2020-10-12 15:36:29,297 INFO L226 Difference]: Without dead ends: 347 [2020-10-12 15:36:29,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:36:29,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-12 15:36:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 202. [2020-10-12 15:36:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-12 15:36:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2020-10-12 15:36:29,333 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 38 [2020-10-12 15:36:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:29,334 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2020-10-12 15:36:29,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:36:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2020-10-12 15:36:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:36:29,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:29,335 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-12 15:36:29,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:36:29,335 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:29,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:29,336 INFO L82 PathProgramCache]: Analyzing trace with hash 140054882, now seen corresponding path program 2 times [2020-10-12 15:36:29,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:29,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863542630] [2020-10-12 15:36:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:29,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:29,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:29,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:30,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:31,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:32,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:34,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:34,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:36:34,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:36:34,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 15:36:34,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:36:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:36:34,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:34,719 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2020-10-12 15:36:35,106 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-12 15:36:35,414 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-12 15:36:35,961 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 46 [2020-10-12 15:36:36,425 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2020-10-12 15:36:36,564 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2020-10-12 15:36:36,687 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-10-12 15:36:36,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:36,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:36,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:36,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:36,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:36,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:36,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:36,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:36,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:36,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:36,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:36,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863542630] [2020-10-12 15:36:36,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:36,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:36:36,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898149298] [2020-10-12 15:36:36,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:36:36,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:36,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:36:36,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:36:36,885 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand 16 states. [2020-10-12 15:36:37,775 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-10-12 15:36:38,034 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-12 15:36:38,428 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-12 15:36:39,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:39,290 INFO L93 Difference]: Finished difference Result 401 states and 510 transitions. [2020-10-12 15:36:39,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:36:39,291 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-12 15:36:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:39,293 INFO L225 Difference]: With dead ends: 401 [2020-10-12 15:36:39,293 INFO L226 Difference]: Without dead ends: 370 [2020-10-12 15:36:39,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:36:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-12 15:36:39,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 208. [2020-10-12 15:36:39,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-12 15:36:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 276 transitions. [2020-10-12 15:36:39,329 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 276 transitions. Word has length 39 [2020-10-12 15:36:39,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:39,329 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 276 transitions. [2020-10-12 15:36:39,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:36:39,329 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 276 transitions. [2020-10-12 15:36:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:36:39,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:39,330 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:36:39,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:36:39,330 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:39,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:39,330 INFO L82 PathProgramCache]: Analyzing trace with hash 863450142, now seen corresponding path program 2 times [2020-10-12 15:36:39,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:39,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417375771] [2020-10-12 15:36:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:39,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:39,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:39,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:39,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:40,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:41,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:44,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:44,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:36:44,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:36:44,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:36:44,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:44,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:36:44,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:44,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:36:44,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:44,650 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-12 15:36:44,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:44,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:44,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:44,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:44,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:44,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:44,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:44,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:44,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:44,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:44,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:44,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417375771] [2020-10-12 15:36:44,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:44,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:36:44,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730383224] [2020-10-12 15:36:44,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:36:44,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:44,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:36:44,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:36:44,904 INFO L87 Difference]: Start difference. First operand 208 states and 276 transitions. Second operand 14 states. [2020-10-12 15:36:46,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:46,115 INFO L93 Difference]: Finished difference Result 319 states and 412 transitions. [2020-10-12 15:36:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:36:46,116 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-12 15:36:46,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:46,118 INFO L225 Difference]: With dead ends: 319 [2020-10-12 15:36:46,118 INFO L226 Difference]: Without dead ends: 288 [2020-10-12 15:36:46,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:36:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-12 15:36:46,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 160. [2020-10-12 15:36:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-12 15:36:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 212 transitions. [2020-10-12 15:36:46,149 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 212 transitions. Word has length 40 [2020-10-12 15:36:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:46,150 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 212 transitions. [2020-10-12 15:36:46,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:36:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 212 transitions. [2020-10-12 15:36:46,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:36:46,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:46,151 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:36:46,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:36:46,151 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:46,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:46,152 INFO L82 PathProgramCache]: Analyzing trace with hash 145759774, now seen corresponding path program 3 times [2020-10-12 15:36:46,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:46,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668867825] [2020-10-12 15:36:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:46,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:46,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:46,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:46,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:47,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:48,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:48,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:51,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:51,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:36:51,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:36:51,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:36:51,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:51,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:36:51,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:51,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:36:51,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:51,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:51,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:51,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:51,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:51,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:51,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:51,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:51,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:51,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:51,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:51,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:51,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668867825] [2020-10-12 15:36:51,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:51,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:36:51,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082097163] [2020-10-12 15:36:51,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:36:51,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:51,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:36:51,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:36:51,653 INFO L87 Difference]: Start difference. First operand 160 states and 212 transitions. Second operand 15 states. [2020-10-12 15:36:53,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:36:53,250 INFO L93 Difference]: Finished difference Result 312 states and 401 transitions. [2020-10-12 15:36:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:36:53,250 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-12 15:36:53,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:36:53,252 INFO L225 Difference]: With dead ends: 312 [2020-10-12 15:36:53,252 INFO L226 Difference]: Without dead ends: 281 [2020-10-12 15:36:53,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:36:53,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-12 15:36:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 177. [2020-10-12 15:36:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-12 15:36:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 232 transitions. [2020-10-12 15:36:53,285 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 232 transitions. Word has length 40 [2020-10-12 15:36:53,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:36:53,285 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 232 transitions. [2020-10-12 15:36:53,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:36:53,286 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 232 transitions. [2020-10-12 15:36:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:36:53,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:36:53,286 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:36:53,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:36:53,287 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:36:53,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:36:53,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1922614178, now seen corresponding path program 2 times [2020-10-12 15:36:53,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:36:53,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855554342] [2020-10-12 15:36:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:36:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:53,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:53,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:53,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:54,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:54,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:54,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:55,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:55,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:57,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:58,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:58,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:36:58,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:36:58,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 15:36:58,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:58,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:36:58,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:36:58,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:36:58,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:58,813 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-12 15:36:59,002 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-12 15:36:59,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:36:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:36:59,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:36:59,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:36:59,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:36:59,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:36:59,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:36:59,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:36:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:36:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:36:59,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:36:59,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:36:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:36:59,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855554342] [2020-10-12 15:36:59,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:36:59,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:36:59,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385991880] [2020-10-12 15:36:59,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:36:59,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:36:59,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:36:59,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:36:59,577 INFO L87 Difference]: Start difference. First operand 177 states and 232 transitions. Second operand 20 states. [2020-10-12 15:37:00,634 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-12 15:37:01,018 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-10-12 15:37:01,226 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-12 15:37:01,426 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-12 15:37:01,673 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-12 15:37:01,876 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-12 15:37:02,391 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 37 [2020-10-12 15:37:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:03,211 INFO L93 Difference]: Finished difference Result 375 states and 481 transitions. [2020-10-12 15:37:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:37:03,211 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-10-12 15:37:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:03,214 INFO L225 Difference]: With dead ends: 375 [2020-10-12 15:37:03,214 INFO L226 Difference]: Without dead ends: 373 [2020-10-12 15:37:03,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=382, Invalid=1688, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:37:03,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-12 15:37:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 207. [2020-10-12 15:37:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-12 15:37:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 277 transitions. [2020-10-12 15:37:03,257 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 277 transitions. Word has length 40 [2020-10-12 15:37:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:03,257 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 277 transitions. [2020-10-12 15:37:03,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:37:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 277 transitions. [2020-10-12 15:37:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:37:03,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:03,259 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2020-10-12 15:37:03,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:37:03,259 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:03,259 INFO L82 PathProgramCache]: Analyzing trace with hash -505683426, now seen corresponding path program 1 times [2020-10-12 15:37:03,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:03,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101456120] [2020-10-12 15:37:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:03,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:03,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:04,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:04,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:05,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:05,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:05,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:37:05,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:37:05,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2174 [2020-10-12 15:37:05,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:05,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:37:05,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:37:05,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:37:05,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:05,673 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-10-12 15:37:05,802 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-12 15:37:05,969 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-12 15:37:06,207 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-12 15:37:06,479 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-12 15:37:06,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:06,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:06,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:06,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:06,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:06,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:37:06,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:06,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:06,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:37:06,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101456120] [2020-10-12 15:37:06,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:06,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:37:06,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844445445] [2020-10-12 15:37:06,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:37:06,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:06,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:37:06,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:37:06,852 INFO L87 Difference]: Start difference. First operand 207 states and 277 transitions. Second operand 18 states. [2020-10-12 15:37:07,475 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-10-12 15:37:07,693 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 58 [2020-10-12 15:37:08,199 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-10-12 15:37:08,460 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2020-10-12 15:37:08,770 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-12 15:37:09,172 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 90 [2020-10-12 15:37:09,723 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-12 15:37:09,924 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-12 15:37:11,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:11,487 INFO L93 Difference]: Finished difference Result 426 states and 547 transitions. [2020-10-12 15:37:11,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 15:37:11,488 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-12 15:37:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:11,491 INFO L225 Difference]: With dead ends: 426 [2020-10-12 15:37:11,491 INFO L226 Difference]: Without dead ends: 424 [2020-10-12 15:37:11,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=487, Invalid=2269, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 15:37:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-12 15:37:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 183. [2020-10-12 15:37:11,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 15:37:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 242 transitions. [2020-10-12 15:37:11,531 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 242 transitions. Word has length 40 [2020-10-12 15:37:11,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:11,531 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 242 transitions. [2020-10-12 15:37:11,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:37:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 242 transitions. [2020-10-12 15:37:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:37:11,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:11,532 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:37:11,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:37:11,533 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:11,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:11,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1754868617, now seen corresponding path program 2 times [2020-10-12 15:37:11,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:11,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725725659] [2020-10-12 15:37:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:11,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:11,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:11,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:11,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:11,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:11,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:11,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:11,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:12,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:12,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:12,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:12,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:12,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:13,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:13,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:16,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:16,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:37:16,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 15:37:16,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:37:16,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:16,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:37:16,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:37:16,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:37:16,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:16,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:16,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:16,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:16,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:16,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:16,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:37:16,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:16,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:16,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:16,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:16,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:37:16,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725725659] [2020-10-12 15:37:16,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:16,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:37:16,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980102308] [2020-10-12 15:37:16,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:37:16,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:16,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:37:16,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:37:16,857 INFO L87 Difference]: Start difference. First operand 183 states and 242 transitions. Second operand 13 states. [2020-10-12 15:37:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:17,705 INFO L93 Difference]: Finished difference Result 294 states and 374 transitions. [2020-10-12 15:37:17,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:37:17,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-12 15:37:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:17,707 INFO L225 Difference]: With dead ends: 294 [2020-10-12 15:37:17,707 INFO L226 Difference]: Without dead ends: 263 [2020-10-12 15:37:17,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:37:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-12 15:37:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 213. [2020-10-12 15:37:17,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-12 15:37:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 275 transitions. [2020-10-12 15:37:17,748 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 275 transitions. Word has length 43 [2020-10-12 15:37:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:17,748 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 275 transitions. [2020-10-12 15:37:17,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:37:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 275 transitions. [2020-10-12 15:37:17,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:37:17,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:17,749 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:37:17,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:37:17,749 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:17,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:17,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1816099975, now seen corresponding path program 3 times [2020-10-12 15:37:17,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:17,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649704635] [2020-10-12 15:37:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:17,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:17,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:17,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:17,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:18,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:18,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:19,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:19,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:19,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:19,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:19,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:19,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:21,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:21,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:37:21,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 15:37:21,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3929 [2020-10-12 15:37:21,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:21,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:37:21,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:37:21,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:37:21,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:22,137 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-12 15:37:22,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:22,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:22,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:22,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:22,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:22,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:37:22,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:22,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:22,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:22,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:22,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:37:22,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649704635] [2020-10-12 15:37:22,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:22,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:37:22,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858900980] [2020-10-12 15:37:22,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:37:22,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:22,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:37:22,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:37:22,518 INFO L87 Difference]: Start difference. First operand 213 states and 275 transitions. Second operand 14 states. [2020-10-12 15:37:22,841 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-12 15:37:23,170 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-12 15:37:23,747 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-12 15:37:23,989 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-12 15:37:24,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:24,532 INFO L93 Difference]: Finished difference Result 380 states and 474 transitions. [2020-10-12 15:37:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:37:24,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-12 15:37:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:24,534 INFO L225 Difference]: With dead ends: 380 [2020-10-12 15:37:24,534 INFO L226 Difference]: Without dead ends: 319 [2020-10-12 15:37:24,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:37:24,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-12 15:37:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 215. [2020-10-12 15:37:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-12 15:37:24,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 277 transitions. [2020-10-12 15:37:24,566 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 277 transitions. Word has length 43 [2020-10-12 15:37:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:24,567 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 277 transitions. [2020-10-12 15:37:24,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:37:24,567 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 277 transitions. [2020-10-12 15:37:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:37:24,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:24,567 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:37:24,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:37:24,568 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:24,568 INFO L82 PathProgramCache]: Analyzing trace with hash -813977597, now seen corresponding path program 1 times [2020-10-12 15:37:24,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:24,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951860388] [2020-10-12 15:37:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:24,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:24,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:24,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:24,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:24,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:37:24,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:37:24,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-12 15:37:24,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:24,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:37:24,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:37:24,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:37:24,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:25,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:25,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:25,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:25,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:25,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:25,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:37:25,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:25,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:25,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:25,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:25,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:37:25,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951860388] [2020-10-12 15:37:25,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:25,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:37:25,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546779655] [2020-10-12 15:37:25,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:37:25,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:25,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:37:25,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:37:25,070 INFO L87 Difference]: Start difference. First operand 215 states and 277 transitions. Second operand 10 states. [2020-10-12 15:37:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:25,652 INFO L93 Difference]: Finished difference Result 280 states and 354 transitions. [2020-10-12 15:37:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:37:25,653 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-12 15:37:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:25,655 INFO L225 Difference]: With dead ends: 280 [2020-10-12 15:37:25,655 INFO L226 Difference]: Without dead ends: 177 [2020-10-12 15:37:25,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:37:25,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-12 15:37:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-10-12 15:37:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-12 15:37:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 231 transitions. [2020-10-12 15:37:25,691 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 231 transitions. Word has length 43 [2020-10-12 15:37:25,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:25,691 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 231 transitions. [2020-10-12 15:37:25,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:37:25,691 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 231 transitions. [2020-10-12 15:37:25,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:37:25,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:25,692 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:37:25,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:37:25,692 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:25,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash 917151646, now seen corresponding path program 3 times [2020-10-12 15:37:25,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:25,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795130378] [2020-10-12 15:37:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:25,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:26,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:26,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:26,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:26,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:27,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:30,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:30,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:37:30,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:37:30,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:37:30,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:30,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:37:30,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:37:30,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:37:30,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:31,008 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-10-12 15:37:31,176 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-12 15:37:31,437 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2020-10-12 15:37:31,728 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2020-10-12 15:37:32,073 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-10-12 15:37:32,420 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-10-12 15:37:32,834 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-10-12 15:37:33,193 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-10-12 15:37:33,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:33,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:33,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:33,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:33,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:33,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:37:33,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:33,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:33,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:33,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:33,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:37:33,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795130378] [2020-10-12 15:37:33,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:33,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:37:33,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341261694] [2020-10-12 15:37:33,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:37:33,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:33,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:37:33,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:37:33,392 INFO L87 Difference]: Start difference. First operand 177 states and 231 transitions. Second operand 19 states. [2020-10-12 15:37:34,267 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2020-10-12 15:37:34,679 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-12 15:37:34,981 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-10-12 15:37:35,234 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-12 15:37:35,477 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-12 15:37:36,100 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 85 [2020-10-12 15:37:36,377 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2020-10-12 15:37:36,780 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2020-10-12 15:37:37,231 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 90 [2020-10-12 15:37:37,621 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2020-10-12 15:37:38,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:38,638 INFO L93 Difference]: Finished difference Result 271 states and 353 transitions. [2020-10-12 15:37:38,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:37:38,639 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-12 15:37:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:38,641 INFO L225 Difference]: With dead ends: 271 [2020-10-12 15:37:38,641 INFO L226 Difference]: Without dead ends: 269 [2020-10-12 15:37:38,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 15:37:38,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-12 15:37:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 137. [2020-10-12 15:37:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 15:37:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 175 transitions. [2020-10-12 15:37:38,666 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 175 transitions. Word has length 43 [2020-10-12 15:37:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:38,666 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 175 transitions. [2020-10-12 15:37:38,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:37:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 175 transitions. [2020-10-12 15:37:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:37:38,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:38,667 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:37:38,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:37:38,668 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:38,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:38,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1898877053, now seen corresponding path program 4 times [2020-10-12 15:37:38,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:38,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711400376] [2020-10-12 15:37:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:38,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:38,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:38,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:38,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:39,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:39,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:40,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:40,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:40,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:41,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:41,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:41,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:43,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:43,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:37:43,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 15:37:43,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 15:37:43,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:43,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:37:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:37:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:37:43,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:43,994 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-12 15:37:44,227 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-12 15:37:44,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:44,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:44,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:44,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:44,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:44,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:37:44,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:44,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:44,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:44,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:44,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:37:44,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711400376] [2020-10-12 15:37:44,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:44,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:37:44,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098579950] [2020-10-12 15:37:44,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:37:44,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:44,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:37:44,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:37:44,485 INFO L87 Difference]: Start difference. First operand 137 states and 175 transitions. Second operand 15 states. [2020-10-12 15:37:44,927 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-12 15:37:45,156 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-12 15:37:45,382 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-12 15:37:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:37:46,180 INFO L93 Difference]: Finished difference Result 266 states and 335 transitions. [2020-10-12 15:37:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:37:46,180 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-12 15:37:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:37:46,182 INFO L225 Difference]: With dead ends: 266 [2020-10-12 15:37:46,183 INFO L226 Difference]: Without dead ends: 235 [2020-10-12 15:37:46,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:37:46,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-12 15:37:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 179. [2020-10-12 15:37:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-12 15:37:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 226 transitions. [2020-10-12 15:37:46,210 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 226 transitions. Word has length 46 [2020-10-12 15:37:46,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:37:46,210 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 226 transitions. [2020-10-12 15:37:46,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:37:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 226 transitions. [2020-10-12 15:37:46,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:37:46,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:37:46,212 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:37:46,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:37:46,212 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:37:46,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:37:46,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1960108411, now seen corresponding path program 5 times [2020-10-12 15:37:46,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:37:46,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013854281] [2020-10-12 15:37:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:37:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:46,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:46,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:46,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:47,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:47,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:48,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:48,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:50,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:50,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:50,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:51,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:51,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:37:51,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:37:51,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 15:37:51,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:51,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:37:51,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:37:51,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:37:51,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:51,605 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 26 [2020-10-12 15:37:51,901 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 32 [2020-10-12 15:37:52,719 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 74 [2020-10-12 15:37:53,762 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 153 DAG size of output: 86 [2020-10-12 15:37:54,733 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 70 [2020-10-12 15:37:55,112 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 42 [2020-10-12 15:37:55,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:37:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:37:55,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:37:55,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:37:55,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:37:55,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:37:55,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:37:55,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:37:55,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:37:55,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:37:55,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:37:55,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:37:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:37:55,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013854281] [2020-10-12 15:37:55,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:37:55,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:37:55,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790233428] [2020-10-12 15:37:55,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:37:55,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:37:55,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:37:55,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:37:55,918 INFO L87 Difference]: Start difference. First operand 179 states and 226 transitions. Second operand 19 states. [2020-10-12 15:37:56,884 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 101 [2020-10-12 15:37:57,453 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 111 [2020-10-12 15:37:57,824 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 67 [2020-10-12 15:37:58,073 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-12 15:37:58,441 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 106 [2020-10-12 15:38:00,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:00,173 INFO L93 Difference]: Finished difference Result 334 states and 411 transitions. [2020-10-12 15:38:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:38:00,173 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-12 15:38:00,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:00,175 INFO L225 Difference]: With dead ends: 334 [2020-10-12 15:38:00,175 INFO L226 Difference]: Without dead ends: 303 [2020-10-12 15:38:00,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:38:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-12 15:38:00,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 222. [2020-10-12 15:38:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-12 15:38:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 275 transitions. [2020-10-12 15:38:00,227 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 275 transitions. Word has length 46 [2020-10-12 15:38:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:00,227 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 275 transitions. [2020-10-12 15:38:00,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:38:00,228 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 275 transitions. [2020-10-12 15:38:00,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:38:00,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:00,229 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:00,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:38:00,229 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:00,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:00,229 INFO L82 PathProgramCache]: Analyzing trace with hash -558004481, now seen corresponding path program 1 times [2020-10-12 15:38:00,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:00,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585025554] [2020-10-12 15:38:00,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:00,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:00,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:00,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:01,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:01,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:01,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:02,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:04,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:04,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:05,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:05,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:05,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:38:05,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:38:05,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 15:38:05,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:05,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:38:05,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:38:05,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:38:05,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:05,696 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2020-10-12 15:38:06,193 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 59 [2020-10-12 15:38:06,723 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 73 [2020-10-12 15:38:07,438 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 82 [2020-10-12 15:38:07,665 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2020-10-12 15:38:08,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:08,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:08,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:08,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:08,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:08,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:08,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:08,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:08,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:08,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:08,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:08,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585025554] [2020-10-12 15:38:08,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:08,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:38:08,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107910125] [2020-10-12 15:38:08,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:38:08,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:08,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:38:08,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:38:08,452 INFO L87 Difference]: Start difference. First operand 222 states and 275 transitions. Second operand 18 states. [2020-10-12 15:38:09,055 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 95 [2020-10-12 15:38:09,457 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 97 [2020-10-12 15:38:10,136 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 106 [2020-10-12 15:38:10,436 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2020-10-12 15:38:11,657 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-12 15:38:11,926 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-10-12 15:38:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:12,545 INFO L93 Difference]: Finished difference Result 336 states and 414 transitions. [2020-10-12 15:38:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:38:12,546 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-12 15:38:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:12,547 INFO L225 Difference]: With dead ends: 336 [2020-10-12 15:38:12,547 INFO L226 Difference]: Without dead ends: 305 [2020-10-12 15:38:12,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:38:12,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-12 15:38:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 208. [2020-10-12 15:38:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-12 15:38:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 259 transitions. [2020-10-12 15:38:12,596 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 259 transitions. Word has length 46 [2020-10-12 15:38:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:12,597 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 259 transitions. [2020-10-12 15:38:12,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:38:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 259 transitions. [2020-10-12 15:38:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:38:12,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:12,598 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:12,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:38:12,598 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:12,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:12,599 INFO L82 PathProgramCache]: Analyzing trace with hash -669969161, now seen corresponding path program 2 times [2020-10-12 15:38:12,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:12,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546529227] [2020-10-12 15:38:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:12,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:13,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:13,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:14,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:14,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:38:14,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:38:14,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1813 [2020-10-12 15:38:14,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:14,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:38:14,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:14,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:38:14,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:14,812 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-12 15:38:15,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:15,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:15,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:15,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:15,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:15,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:15,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:15,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:15,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:15,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:15,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:15,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546529227] [2020-10-12 15:38:15,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:15,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:38:15,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055805754] [2020-10-12 15:38:15,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:38:15,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:15,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:38:15,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:38:15,235 INFO L87 Difference]: Start difference. First operand 208 states and 259 transitions. Second operand 16 states. [2020-10-12 15:38:15,712 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2020-10-12 15:38:16,008 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2020-10-12 15:38:16,224 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2020-10-12 15:38:16,524 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-10-12 15:38:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:18,325 INFO L93 Difference]: Finished difference Result 440 states and 545 transitions. [2020-10-12 15:38:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:38:18,325 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-12 15:38:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:18,328 INFO L225 Difference]: With dead ends: 440 [2020-10-12 15:38:18,328 INFO L226 Difference]: Without dead ends: 409 [2020-10-12 15:38:18,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:38:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-10-12 15:38:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2020-10-12 15:38:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-12 15:38:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 360 transitions. [2020-10-12 15:38:18,377 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 360 transitions. Word has length 46 [2020-10-12 15:38:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:18,378 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 360 transitions. [2020-10-12 15:38:18,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:38:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 360 transitions. [2020-10-12 15:38:18,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:38:18,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:18,378 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:18,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 15:38:18,379 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:18,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:18,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1106885243, now seen corresponding path program 2 times [2020-10-12 15:38:18,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:18,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484627929] [2020-10-12 15:38:18,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:18,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:18,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:18,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:19,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:19,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:19,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:20,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:20,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:20,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:20,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:20,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:38:20,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:38:20,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2419 [2020-10-12 15:38:20,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:38:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:38:20,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:21,097 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-10-12 15:38:21,248 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-10-12 15:38:21,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:21,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:21,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:21,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:21,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:21,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:21,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:21,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:21,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484627929] [2020-10-12 15:38:21,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:21,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:38:21,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881170367] [2020-10-12 15:38:21,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:38:21,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:21,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:38:21,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:38:21,620 INFO L87 Difference]: Start difference. First operand 291 states and 360 transitions. Second operand 17 states. [2020-10-12 15:38:22,482 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-12 15:38:23,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:23,809 INFO L93 Difference]: Finished difference Result 422 states and 522 transitions. [2020-10-12 15:38:23,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:38:23,810 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-12 15:38:23,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:23,812 INFO L225 Difference]: With dead ends: 422 [2020-10-12 15:38:23,812 INFO L226 Difference]: Without dead ends: 391 [2020-10-12 15:38:23,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:38:23,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-10-12 15:38:23,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 253. [2020-10-12 15:38:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-12 15:38:23,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 318 transitions. [2020-10-12 15:38:23,862 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 318 transitions. Word has length 46 [2020-10-12 15:38:23,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:23,862 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 318 transitions. [2020-10-12 15:38:23,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:38:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 318 transitions. [2020-10-12 15:38:23,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:38:23,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:23,864 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-12 15:38:23,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 15:38:23,864 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash 586855377, now seen corresponding path program 1 times [2020-10-12 15:38:23,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:23,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072879057] [2020-10-12 15:38:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:23,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:23,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:24,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:24,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:24,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:24,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:24,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:24,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:25,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:25,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:26,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:26,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:26,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:27,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:27,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:27,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:28,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:28,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:28,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:28,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:38:28,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 15:38:28,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 15:38:28,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:38:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:38:28,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:29,207 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-12 15:38:29,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:29,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:29,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:29,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:29,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:29,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:29,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:29,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:29,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:29,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:29,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:29,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072879057] [2020-10-12 15:38:29,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:29,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:38:29,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138187027] [2020-10-12 15:38:29,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:38:29,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:29,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:38:29,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:38:29,609 INFO L87 Difference]: Start difference. First operand 253 states and 318 transitions. Second operand 16 states. [2020-10-12 15:38:30,024 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-12 15:38:30,462 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-12 15:38:30,740 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-12 15:38:31,010 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-12 15:38:31,705 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-12 15:38:31,870 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-12 15:38:32,063 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-12 15:38:32,240 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-12 15:38:32,426 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-12 15:38:32,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:32,747 INFO L93 Difference]: Finished difference Result 520 states and 648 transitions. [2020-10-12 15:38:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:38:32,747 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-12 15:38:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:32,750 INFO L225 Difference]: With dead ends: 520 [2020-10-12 15:38:32,751 INFO L226 Difference]: Without dead ends: 489 [2020-10-12 15:38:32,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:38:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-10-12 15:38:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 345. [2020-10-12 15:38:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-12 15:38:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 431 transitions. [2020-10-12 15:38:32,832 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 431 transitions. Word has length 47 [2020-10-12 15:38:32,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:32,833 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 431 transitions. [2020-10-12 15:38:32,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:38:32,833 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 431 transitions. [2020-10-12 15:38:32,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:38:32,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:32,834 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-12 15:38:32,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 15:38:32,834 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:32,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1931257515, now seen corresponding path program 1 times [2020-10-12 15:38:32,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:32,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9918344] [2020-10-12 15:38:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:32,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:32,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:32,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:33,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:33,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:33,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:33,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:33,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:33,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:34,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:34,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:34,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:36,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:36,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:36,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:37,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:37,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:38:37,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 15:38:37,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 15:38:37,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:37,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:38:37,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:37,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:38:37,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:38,266 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-12 15:38:38,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:38,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:38,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:38,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:38,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:38,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:38,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:38,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:38,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:38,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:38,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:38,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9918344] [2020-10-12 15:38:38,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:38,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:38:38,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449642126] [2020-10-12 15:38:38,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:38:38,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:38,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:38:38,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:38:38,819 INFO L87 Difference]: Start difference. First operand 345 states and 431 transitions. Second operand 17 states. [2020-10-12 15:38:39,146 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-10-12 15:38:39,327 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-12 15:38:39,572 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-12 15:38:40,012 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-12 15:38:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:41,346 INFO L93 Difference]: Finished difference Result 549 states and 669 transitions. [2020-10-12 15:38:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:38:41,347 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-10-12 15:38:41,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:41,351 INFO L225 Difference]: With dead ends: 549 [2020-10-12 15:38:41,351 INFO L226 Difference]: Without dead ends: 494 [2020-10-12 15:38:41,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=299, Invalid=1107, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:38:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2020-10-12 15:38:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 349. [2020-10-12 15:38:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-12 15:38:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 435 transitions. [2020-10-12 15:38:41,478 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 435 transitions. Word has length 47 [2020-10-12 15:38:41,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:41,481 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 435 transitions. [2020-10-12 15:38:41,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:38:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 435 transitions. [2020-10-12 15:38:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:38:41,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:41,482 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:41,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 15:38:41,483 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:41,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1870026157, now seen corresponding path program 2 times [2020-10-12 15:38:41,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:41,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666644324] [2020-10-12 15:38:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:41,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:41,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:41,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:41,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:41,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking...