/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/alternating_list-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:03:37,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:03:37,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:03:37,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:03:37,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:03:37,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:03:37,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:03:37,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:03:37,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:03:37,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:03:37,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:03:37,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:03:37,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:03:37,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:03:37,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:03:37,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:03:37,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:03:37,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:03:37,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:03:37,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:03:37,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:03:37,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:03:37,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:03:37,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:03:37,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:03:37,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:03:37,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:03:37,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:03:37,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:03:37,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:03:37,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:03:37,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:03:37,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:03:37,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:03:37,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:03:37,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:03:37,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:03:37,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:03:37,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:03:37,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:03:37,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:03:37,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:03:37,585 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:03:37,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:03:37,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:03:37,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:03:37,587 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:03:37,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:03:37,591 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:03:37,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:03:37,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:03:37,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:03:37,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:03:37,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:03:37,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:03:37,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:03:37,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:03:37,593 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:03:37,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:03:37,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:03:37,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:03:37,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:03:37,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:03:37,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:03:37,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:03:37,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:03:37,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:03:37,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:03:37,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:03:37,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:03:37,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:03:37,599 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:03:37,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:03:37,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:03:37,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:03:37,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:03:37,977 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:03:37,978 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-1.i [2020-10-14 05:03:38,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ccbab544/2dc706fcf5c249f29055c80d0a4cd909/FLAG7a8aecd3c [2020-10-14 05:03:38,515 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:03:38,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/alternating_list-1.i [2020-10-14 05:03:38,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ccbab544/2dc706fcf5c249f29055c80d0a4cd909/FLAG7a8aecd3c [2020-10-14 05:03:38,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ccbab544/2dc706fcf5c249f29055c80d0a4cd909 [2020-10-14 05:03:38,833 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:03:38,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:03:38,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:03:38,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:03:38,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:03:38,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:03:38" (1/1) ... [2020-10-14 05:03:38,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c6e054d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:38, skipping insertion in model container [2020-10-14 05:03:38,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:03:38" (1/1) ... [2020-10-14 05:03:38,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:03:38,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:03:39,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:03:39,381 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:03:39,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:03:39,493 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:03:39,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:39 WrapperNode [2020-10-14 05:03:39,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:03:39,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:03:39,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:03:39,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:03:39,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:39" (1/1) ... [2020-10-14 05:03:39,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:39" (1/1) ... [2020-10-14 05:03:39,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:39" (1/1) ... [2020-10-14 05:03:39,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:39" (1/1) ... [2020-10-14 05:03:39,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:39" (1/1) ... [2020-10-14 05:03:39,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:39" (1/1) ... [2020-10-14 05:03:39,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:39" (1/1) ... [2020-10-14 05:03:39,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:03:39,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:03:39,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:03:39,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:03:39,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:03:39,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:03:39,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:03:39,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 05:03:39,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 05:03:39,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-14 05:03:39,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-14 05:03:39,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-14 05:03:39,622 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 05:03:39,622 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:03:39,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:03:39,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:03:39,623 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 05:03:39,623 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 05:03:39,623 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 05:03:39,623 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 05:03:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 05:03:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 05:03:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 05:03:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 05:03:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 05:03:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 05:03:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 05:03:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 05:03:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 05:03:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 05:03:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 05:03:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 05:03:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 05:03:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 05:03:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-14 05:03:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-14 05:03:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-14 05:03:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 05:03:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 05:03:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 05:03:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 05:03:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 05:03:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 05:03:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 05:03:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 05:03:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 05:03:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 05:03:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 05:03:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 05:03:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 05:03:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 05:03:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 05:03:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 05:03:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 05:03:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 05:03:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 05:03:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 05:03:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 05:03:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 05:03:39,629 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 05:03:39,629 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 05:03:39,629 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 05:03:39,629 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 05:03:39,629 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 05:03:39,629 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 05:03:39,629 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 05:03:39,630 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 05:03:39,630 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 05:03:39,630 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 05:03:39,630 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 05:03:39,630 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 05:03:39,630 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 05:03:39,631 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 05:03:39,631 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 05:03:39,631 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 05:03:39,631 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 05:03:39,631 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 05:03:39,631 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 05:03:39,632 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 05:03:39,632 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:03:39,632 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 05:03:39,632 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 05:03:39,632 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 05:03:39,632 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 05:03:39,632 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 05:03:39,633 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 05:03:39,633 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 05:03:39,633 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 05:03:39,633 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 05:03:39,633 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 05:03:39,633 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 05:03:39,634 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 05:03:39,634 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 05:03:39,634 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 05:03:39,634 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 05:03:39,634 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 05:03:39,634 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 05:03:39,634 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 05:03:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 05:03:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 05:03:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 05:03:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 05:03:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 05:03:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 05:03:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 05:03:39,636 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 05:03:39,636 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 05:03:39,636 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 05:03:39,636 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 05:03:39,636 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 05:03:39,636 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 05:03:39,636 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 05:03:39,637 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 05:03:39,637 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 05:03:39,637 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 05:03:39,637 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 05:03:39,637 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 05:03:39,637 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 05:03:39,637 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 05:03:39,638 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 05:03:39,638 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 05:03:39,638 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 05:03:39,638 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 05:03:39,638 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 05:03:39,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:03:39,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 05:03:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:03:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 05:03:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 05:03:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:03:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:03:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:03:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:03:39,994 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 05:03:40,130 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:03:40,131 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 05:03:40,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:03:40 BoogieIcfgContainer [2020-10-14 05:03:40,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:03:40,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:03:40,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:03:40,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:03:40,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:03:38" (1/3) ... [2020-10-14 05:03:40,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce5be85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:03:40, skipping insertion in model container [2020-10-14 05:03:40,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:39" (2/3) ... [2020-10-14 05:03:40,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce5be85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:03:40, skipping insertion in model container [2020-10-14 05:03:40,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:03:40" (3/3) ... [2020-10-14 05:03:40,144 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-1.i [2020-10-14 05:03:40,155 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:03:40,164 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:03:40,178 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:03:40,203 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:03:40,203 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:03:40,203 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:03:40,204 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:03:40,204 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:03:40,204 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:03:40,204 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:03:40,204 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:03:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-14 05:03:40,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:03:40,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:40,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:40,231 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:40,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:40,238 INFO L82 PathProgramCache]: Analyzing trace with hash 209903222, now seen corresponding path program 1 times [2020-10-14 05:03:40,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:40,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254534152] [2020-10-14 05:03:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:40,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:40,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:40,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:40,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:40,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 05:03:40,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:03:40,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-14 05:03:40,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:40,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:40,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:40,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:03:40,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:40,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:03:40,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:40,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:40,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:40,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:40,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:40,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 05:03:40,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:40,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:40,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:40,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:40,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:40,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:40,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254534152] [2020-10-14 05:03:40,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:40,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:03:40,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033517384] [2020-10-14 05:03:40,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:03:40,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:40,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:03:40,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:03:40,880 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-14 05:03:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:40,980 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-14 05:03:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:03:40,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-14 05:03:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:40,990 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:03:40,990 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 05:03:40,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:03:41,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 05:03:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 05:03:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:03:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-14 05:03:41,028 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2020-10-14 05:03:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:41,028 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-14 05:03:41,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:03:41,029 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-14 05:03:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:03:41,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:41,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:41,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:03:41,030 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:41,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:41,031 INFO L82 PathProgramCache]: Analyzing trace with hash 919137993, now seen corresponding path program 1 times [2020-10-14 05:03:41,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:41,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876928414] [2020-10-14 05:03:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:41,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:41,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:41,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:41,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:03:41,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:41,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-14 05:03:41,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:41,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:41,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:03:41,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:03:41,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:03:41,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:03:41,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:41,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:41,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:41,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:41,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:41,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:03:41,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:41,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:41,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:41,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:41,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:41,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:41,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876928414] [2020-10-14 05:03:41,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:41,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:03:41,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154627716] [2020-10-14 05:03:41,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:03:41,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:41,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:03:41,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:03:41,256 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-10-14 05:03:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:41,322 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-10-14 05:03:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:03:41,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 05:03:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:41,324 INFO L225 Difference]: With dead ends: 51 [2020-10-14 05:03:41,324 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:03:41,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:03:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:03:41,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-14 05:03:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:03:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-14 05:03:41,332 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2020-10-14 05:03:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:41,333 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-14 05:03:41,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:03:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-14 05:03:41,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:03:41,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:41,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:41,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:03:41,334 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:41,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:41,335 INFO L82 PathProgramCache]: Analyzing trace with hash 919131049, now seen corresponding path program 1 times [2020-10-14 05:03:41,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:41,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454696268] [2020-10-14 05:03:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:41,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:41,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:41,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:03:41,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:41,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-14 05:03:41,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:41,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:41,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:03:41,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:03:41,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:03:41,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:41,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:41,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:41,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:41,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:41,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:41,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:03:41,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:41,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:41,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:41,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:41,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:41,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:41,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454696268] [2020-10-14 05:03:41,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:41,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:03:41,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364850592] [2020-10-14 05:03:41,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:03:41,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:41,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:03:41,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:03:41,491 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 6 states. [2020-10-14 05:03:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:41,649 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-14 05:03:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:03:41,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 05:03:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:41,652 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:03:41,652 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:03:41,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:03:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:03:41,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2020-10-14 05:03:41,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:03:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-14 05:03:41,670 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 16 [2020-10-14 05:03:41,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:41,671 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-14 05:03:41,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:03:41,671 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-14 05:03:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:03:41,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:41,675 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:41,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:03:41,675 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:41,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:41,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1446652468, now seen corresponding path program 1 times [2020-10-14 05:03:41,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:41,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865741550] [2020-10-14 05:03:41,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:41,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:41,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:42,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:42,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:03:42,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:42,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-14 05:03:42,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:42,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:42,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:03:42,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:42,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:03:42,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:42,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:42,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:42,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:42,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:42,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:42,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:03:42,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:42,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:42,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:42,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:42,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:42,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:42,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865741550] [2020-10-14 05:03:42,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:42,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:03:42,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431411335] [2020-10-14 05:03:42,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:03:42,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:03:42,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:03:42,406 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 10 states. [2020-10-14 05:03:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:42,855 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-10-14 05:03:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:03:42,856 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-14 05:03:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:42,858 INFO L225 Difference]: With dead ends: 65 [2020-10-14 05:03:42,858 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 05:03:42,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:03:42,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 05:03:42,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-14 05:03:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:03:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-14 05:03:42,887 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 22 [2020-10-14 05:03:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:42,887 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-14 05:03:42,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:03:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-14 05:03:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:03:42,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:42,890 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:42,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:03:42,891 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:42,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:42,891 INFO L82 PathProgramCache]: Analyzing trace with hash -825238535, now seen corresponding path program 1 times [2020-10-14 05:03:42,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:42,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905137607] [2020-10-14 05:03:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:42,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:43,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:43,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:03:43,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:43,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-14 05:03:43,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:43,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:43,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:03:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:03:43,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:43,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:43,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:43,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:43,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:43,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:43,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:03:43,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:43,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:43,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:43,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:43,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:43,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:43,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905137607] [2020-10-14 05:03:43,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:43,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:03:43,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110476662] [2020-10-14 05:03:43,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:03:43,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:43,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:03:43,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:03:43,423 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 10 states. [2020-10-14 05:03:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:43,723 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2020-10-14 05:03:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:03:43,727 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-14 05:03:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:43,728 INFO L225 Difference]: With dead ends: 75 [2020-10-14 05:03:43,728 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 05:03:43,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:43,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 05:03:43,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2020-10-14 05:03:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:03:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-14 05:03:43,736 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 27 [2020-10-14 05:03:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:43,737 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-14 05:03:43,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:03:43,737 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-14 05:03:43,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:03:43,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:43,738 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:43,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:03:43,739 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:43,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:43,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1842687103, now seen corresponding path program 2 times [2020-10-14 05:03:43,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:43,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433342132] [2020-10-14 05:03:43,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:43,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:43,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:43,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:03:43,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:43,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-14 05:03:43,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:43,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:43,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:03:43,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:03:43,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:03:43,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:43,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:43,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:43,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:43,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:43,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:43,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:43,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:43,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:43,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:43,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:43,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:43,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:43,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433342132] [2020-10-14 05:03:43,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:43,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:03:43,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066848352] [2020-10-14 05:03:43,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:03:43,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:43,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:03:43,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:03:43,848 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 4 states. [2020-10-14 05:03:43,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:43,912 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-10-14 05:03:43,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:03:43,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-14 05:03:43,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:43,914 INFO L225 Difference]: With dead ends: 69 [2020-10-14 05:03:43,914 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 05:03:43,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:03:43,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 05:03:43,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-14 05:03:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:03:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-14 05:03:43,920 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 28 [2020-10-14 05:03:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:43,921 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-14 05:03:43,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:03:43,921 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-14 05:03:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:03:43,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:43,922 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:43,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:03:43,922 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:43,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:43,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2100852541, now seen corresponding path program 1 times [2020-10-14 05:03:43,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:43,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36309720] [2020-10-14 05:03:43,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:43,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:44,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:03:44,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:44,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-14 05:03:44,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:44,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:03:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:03:44,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:44,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:44,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:44,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:44,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:44,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:03:44,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:44,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:44,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:44,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:44,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:44,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:44,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36309720] [2020-10-14 05:03:44,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:44,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:03:44,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419002489] [2020-10-14 05:03:44,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:03:44,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:44,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:03:44,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:03:44,704 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2020-10-14 05:03:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:45,160 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-10-14 05:03:45,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:03:45,161 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-14 05:03:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:45,162 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:03:45,162 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:03:45,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:03:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:03:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-14 05:03:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 05:03:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-14 05:03:45,170 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 28 [2020-10-14 05:03:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:45,170 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-14 05:03:45,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:03:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-14 05:03:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:03:45,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:45,172 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] [2020-10-14 05:03:45,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:03:45,172 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:45,173 INFO L82 PathProgramCache]: Analyzing trace with hash -887796592, now seen corresponding path program 1 times [2020-10-14 05:03:45,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:45,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873243330] [2020-10-14 05:03:45,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:45,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:45,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:03:45,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:45,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-14 05:03:45,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:45,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:45,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:03:45,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:45,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:03:45,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:45,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:45,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:45,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:45,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:45,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:45,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:45,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:45,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:45,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:45,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:45,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:45,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873243330] [2020-10-14 05:03:45,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:45,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:03:45,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469842784] [2020-10-14 05:03:45,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:03:45,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:45,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:03:45,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:03:45,835 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 13 states. [2020-10-14 05:03:46,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:46,326 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-10-14 05:03:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:03:46,327 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-14 05:03:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:46,329 INFO L225 Difference]: With dead ends: 71 [2020-10-14 05:03:46,329 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 05:03:46,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:03:46,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 05:03:46,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-10-14 05:03:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 05:03:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-14 05:03:46,337 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 33 [2020-10-14 05:03:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:46,337 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-14 05:03:46,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:03:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-14 05:03:46,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:03:46,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:46,340 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:46,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:03:46,340 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash -96612664, now seen corresponding path program 2 times [2020-10-14 05:03:46,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:46,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160972425] [2020-10-14 05:03:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:46,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:46,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:47,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:47,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:03:47,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:47,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-14 05:03:47,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:47,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:47,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:03:47,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:47,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:03:47,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:47,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:47,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:47,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:47,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:47,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:47,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:03:47,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:47,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:47,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:47,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:47,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:47,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:47,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160972425] [2020-10-14 05:03:47,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:47,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:03:47,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014928701] [2020-10-14 05:03:47,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:03:47,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:47,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:03:47,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:47,665 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 15 states. [2020-10-14 05:03:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:47,957 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-10-14 05:03:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:03:47,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-14 05:03:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:47,959 INFO L225 Difference]: With dead ends: 64 [2020-10-14 05:03:47,959 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 05:03:47,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:03:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 05:03:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-14 05:03:47,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 05:03:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-14 05:03:47,966 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 34 [2020-10-14 05:03:47,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:47,967 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-14 05:03:47,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:03:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-14 05:03:47,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:03:47,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:47,968 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 05:03:47,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:03:47,969 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:47,969 INFO L82 PathProgramCache]: Analyzing trace with hash -862472195, now seen corresponding path program 1 times [2020-10-14 05:03:47,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:47,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449689447] [2020-10-14 05:03:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:48,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:48,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:48,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:03:48,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:48,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-14 05:03:48,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:48,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:48,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:03:48,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:48,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:03:48,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:48,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:48,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:48,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:48,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:48,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:48,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:48,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:48,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:48,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:48,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:48,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:48,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:48,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449689447] [2020-10-14 05:03:48,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:48,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:03:48,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640637741] [2020-10-14 05:03:48,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:03:48,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:48,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:03:48,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:03:48,861 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 13 states. [2020-10-14 05:03:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:49,388 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-10-14 05:03:49,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:03:49,388 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-14 05:03:49,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:49,390 INFO L225 Difference]: With dead ends: 81 [2020-10-14 05:03:49,390 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 05:03:49,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:03:49,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 05:03:49,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-10-14 05:03:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:03:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-14 05:03:49,398 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 38 [2020-10-14 05:03:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:49,398 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-14 05:03:49,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:03:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-14 05:03:49,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:03:49,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:49,399 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:49,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:03:49,400 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:49,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:49,400 INFO L82 PathProgramCache]: Analyzing trace with hash 201323493, now seen corresponding path program 2 times [2020-10-14 05:03:49,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:49,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527988508] [2020-10-14 05:03:49,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:49,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:50,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:50,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:03:50,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:50,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 579 [2020-10-14 05:03:50,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:50,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:50,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:03:50,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:50,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:03:50,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:50,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:50,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:50,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:50,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:50,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:50,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:50,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:50,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:50,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:50,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:50,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:50,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:50,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527988508] [2020-10-14 05:03:50,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:50,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:03:50,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937941171] [2020-10-14 05:03:50,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:03:50,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:50,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:03:50,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:03:50,601 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 16 states. [2020-10-14 05:03:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:51,717 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-14 05:03:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:03:51,718 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-14 05:03:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:51,719 INFO L225 Difference]: With dead ends: 64 [2020-10-14 05:03:51,719 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 05:03:51,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:03:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 05:03:51,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-14 05:03:51,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 05:03:51,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-14 05:03:51,732 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 39 [2020-10-14 05:03:51,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:51,733 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-14 05:03:51,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:03:51,733 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-14 05:03:51,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:03:51,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:51,736 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:51,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:03:51,736 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash 407461320, now seen corresponding path program 2 times [2020-10-14 05:03:51,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:51,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525077011] [2020-10-14 05:03:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:51,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:52,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:52,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:03:52,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:52,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-14 05:03:52,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:52,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:52,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:03:52,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:52,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:03:52,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:52,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:52,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:52,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:52,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:52,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:52,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:52,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:52,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:52,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:52,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:52,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:52,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:52,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525077011] [2020-10-14 05:03:52,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:52,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:03:52,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739245419] [2020-10-14 05:03:52,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:03:52,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:52,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:03:52,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:03:52,831 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 17 states. [2020-10-14 05:03:53,641 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-14 05:03:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:54,265 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2020-10-14 05:03:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:03:54,265 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-14 05:03:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:54,266 INFO L225 Difference]: With dead ends: 86 [2020-10-14 05:03:54,266 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 05:03:54,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:03:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 05:03:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2020-10-14 05:03:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 05:03:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-14 05:03:54,275 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 44 [2020-10-14 05:03:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:54,275 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-14 05:03:54,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:03:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-14 05:03:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 05:03:54,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:54,276 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:54,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:03:54,277 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:54,277 INFO L82 PathProgramCache]: Analyzing trace with hash 30786789, now seen corresponding path program 1 times [2020-10-14 05:03:54,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:54,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402381725] [2020-10-14 05:03:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:54,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:54,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:54,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 05:03:54,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:54,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-14 05:03:54,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:54,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:03:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 05:03:54,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:55,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:55,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:55,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:55,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:55,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:55,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:55,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:55,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:55,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:55,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:55,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:55,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:55,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402381725] [2020-10-14 05:03:55,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:55,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:03:55,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837850927] [2020-10-14 05:03:55,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:03:55,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:55,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:03:55,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:03:55,429 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 16 states. [2020-10-14 05:03:56,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:56,225 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2020-10-14 05:03:56,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:03:56,225 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-14 05:03:56,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:56,226 INFO L225 Difference]: With dead ends: 96 [2020-10-14 05:03:56,226 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 05:03:56,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:03:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 05:03:56,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-10-14 05:03:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 05:03:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-14 05:03:56,238 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 49 [2020-10-14 05:03:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:56,240 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-14 05:03:56,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:03:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-14 05:03:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:03:56,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:56,241 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:56,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:03:56,242 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:56,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:56,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2131211409, now seen corresponding path program 3 times [2020-10-14 05:03:56,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:56,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333386120] [2020-10-14 05:03:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:56,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:56,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:56,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:03:56,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:56,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-14 05:03:56,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:56,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:03:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:56,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:03:56,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:57,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:57,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:57,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:57,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:57,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:57,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:57,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:57,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:57,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:57,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333386120] [2020-10-14 05:03:57,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:57,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:03:57,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986440721] [2020-10-14 05:03:57,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:03:57,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:57,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:03:57,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:03:57,466 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 18 states. [2020-10-14 05:03:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:58,457 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-10-14 05:03:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:03:58,458 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-10-14 05:03:58,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:58,458 INFO L225 Difference]: With dead ends: 70 [2020-10-14 05:03:58,459 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 05:03:58,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:03:58,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 05:03:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-14 05:03:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:03:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-14 05:03:58,466 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 50 [2020-10-14 05:03:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:58,467 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-14 05:03:58,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:03:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-14 05:03:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 05:03:58,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:58,469 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:58,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:03:58,470 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash 966476732, now seen corresponding path program 2 times [2020-10-14 05:03:58,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:58,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359785603] [2020-10-14 05:03:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:58,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:59,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:59,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 05:03:59,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:59,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-14 05:03:59,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:59,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:03:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 05:03:59,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:00,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:00,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:00,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:00,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:00,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:00,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:00,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:00,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:00,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:00,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:00,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:00,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:00,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359785603] [2020-10-14 05:04:00,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:00,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:04:00,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393262980] [2020-10-14 05:04:00,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:04:00,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:00,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:04:00,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:04:00,266 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 19 states. [2020-10-14 05:04:00,904 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-14 05:04:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:01,315 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2020-10-14 05:04:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:04:01,315 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-10-14 05:04:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:01,316 INFO L225 Difference]: With dead ends: 100 [2020-10-14 05:04:01,316 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 05:04:01,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:04:01,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 05:04:01,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-10-14 05:04:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 05:04:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-14 05:04:01,336 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 55 [2020-10-14 05:04:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:01,336 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-14 05:04:01,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:04:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-14 05:04:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:04:01,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:01,339 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:01,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:04:01,340 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:01,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:01,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1900633169, now seen corresponding path program 4 times [2020-10-14 05:04:01,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:01,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717153640] [2020-10-14 05:04:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:01,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:02,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:02,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:04:02,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:02,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-14 05:04:02,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:02,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:02,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:04:02,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:02,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:04:02,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:03,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:03,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:03,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:03,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:03,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:03,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:03,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:03,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:03,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:03,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:03,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:03,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:03,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717153640] [2020-10-14 05:04:03,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:03,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:04:03,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539004954] [2020-10-14 05:04:03,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:04:03,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:03,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:04:03,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:04:03,279 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 19 states. [2020-10-14 05:04:04,066 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-14 05:04:04,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:04,649 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-10-14 05:04:04,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:04:04,650 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-14 05:04:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:04,651 INFO L225 Difference]: With dead ends: 112 [2020-10-14 05:04:04,651 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 05:04:04,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:04:04,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 05:04:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-10-14 05:04:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:04:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-14 05:04:04,659 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 60 [2020-10-14 05:04:04,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:04,660 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-14 05:04:04,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:04:04,660 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-14 05:04:04,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 05:04:04,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:04,661 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:04,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:04:04,661 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:04,661 INFO L82 PathProgramCache]: Analyzing trace with hash 360965073, now seen corresponding path program 3 times [2020-10-14 05:04:04,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:04,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057269068] [2020-10-14 05:04:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:04,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:05,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:05,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 05:04:05,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:05,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1166 [2020-10-14 05:04:05,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:05,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:05,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:04:05,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:05,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 05:04:05,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:06,457 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-14 05:04:06,693 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2020-10-14 05:04:07,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:07,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:07,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:07,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:07,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:07,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:07,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:07,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:07,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:07,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:07,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:07,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:07,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057269068] [2020-10-14 05:04:07,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:07,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:04:07,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018095009] [2020-10-14 05:04:07,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:04:07,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:07,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:04:07,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:04:07,234 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 22 states. [2020-10-14 05:04:08,290 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-14 05:04:08,467 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2020-10-14 05:04:08,682 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2020-10-14 05:04:09,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:09,879 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-14 05:04:09,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:04:09,880 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-10-14 05:04:09,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:09,881 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:04:09,881 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 05:04:09,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=213, Invalid=1767, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:04:09,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 05:04:09,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-10-14 05:04:09,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 05:04:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-10-14 05:04:09,891 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 61 [2020-10-14 05:04:09,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:09,891 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-10-14 05:04:09,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:04:09,891 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-10-14 05:04:09,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:04:09,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:09,892 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:09,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:04:09,892 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:09,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:09,893 INFO L82 PathProgramCache]: Analyzing trace with hash -241532580, now seen corresponding path program 5 times [2020-10-14 05:04:09,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:09,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937988853] [2020-10-14 05:04:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:09,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:11,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:11,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:04:11,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:11,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1362 [2020-10-14 05:04:11,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:11,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:11,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:04:11,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:11,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 05:04:11,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:12,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:12,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:12,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:12,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:12,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:12,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:12,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:12,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:12,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:12,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:12,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:12,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:12,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937988853] [2020-10-14 05:04:12,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:12,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:04:12,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628303905] [2020-10-14 05:04:12,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:04:12,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:12,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:04:12,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:04:12,784 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 24 states. [2020-10-14 05:04:13,939 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-14 05:04:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:14,523 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2020-10-14 05:04:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:04:14,523 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-10-14 05:04:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:14,525 INFO L225 Difference]: With dead ends: 116 [2020-10-14 05:04:14,525 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 05:04:14,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:04:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 05:04:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2020-10-14 05:04:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 05:04:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-10-14 05:04:14,535 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 66 [2020-10-14 05:04:14,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:14,535 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-10-14 05:04:14,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:04:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-10-14 05:04:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 05:04:14,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:14,536 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:14,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:04:14,537 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:14,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:14,537 INFO L82 PathProgramCache]: Analyzing trace with hash 156220881, now seen corresponding path program 4 times [2020-10-14 05:04:14,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:14,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330831587] [2020-10-14 05:04:14,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:14,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:15,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:15,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 05:04:15,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:15,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1354 [2020-10-14 05:04:15,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:15,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:15,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:04:15,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:15,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 05:04:15,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:16,485 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-14 05:04:16,996 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-14 05:04:17,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:17,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:17,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:17,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:17,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:17,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:17,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:17,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:17,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:17,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:17,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:17,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:17,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330831587] [2020-10-14 05:04:17,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:17,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:04:17,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774705196] [2020-10-14 05:04:17,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:04:17,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:17,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:04:17,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:04:17,757 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 24 states. [2020-10-14 05:04:19,552 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 71 [2020-10-14 05:04:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:20,926 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2020-10-14 05:04:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:04:20,927 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-10-14 05:04:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:20,928 INFO L225 Difference]: With dead ends: 131 [2020-10-14 05:04:20,928 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 05:04:20,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=279, Invalid=2477, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 05:04:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 05:04:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2020-10-14 05:04:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 05:04:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-10-14 05:04:20,936 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 71 [2020-10-14 05:04:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:20,936 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-10-14 05:04:20,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:04:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-10-14 05:04:20,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 05:04:20,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:20,937 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:20,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:04:20,938 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:20,938 INFO L82 PathProgramCache]: Analyzing trace with hash -838798875, now seen corresponding path program 6 times [2020-10-14 05:04:20,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:20,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139773378] [2020-10-14 05:04:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:21,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:22,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:22,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 05:04:22,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:22,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1655 [2020-10-14 05:04:22,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:22,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:22,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:04:22,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:22,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 05:04:22,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:23,459 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-14 05:04:23,603 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-14 05:04:23,738 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-14 05:04:23,916 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-14 05:04:24,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:24,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:24,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:24,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:24,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:24,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:24,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:24,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:24,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:24,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:24,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:24,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:24,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139773378] [2020-10-14 05:04:24,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:24,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:04:24,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769430927] [2020-10-14 05:04:24,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:04:24,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:24,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:04:24,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:04:24,496 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 25 states. [2020-10-14 05:04:25,284 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 54 [2020-10-14 05:04:25,481 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 45 [2020-10-14 05:04:25,826 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2020-10-14 05:04:26,198 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 63 [2020-10-14 05:04:26,433 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 69 [2020-10-14 05:04:26,697 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 84 [2020-10-14 05:04:26,897 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-10-14 05:04:27,277 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 87 [2020-10-14 05:04:28,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:28,405 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-14 05:04:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:04:28,406 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2020-10-14 05:04:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:28,407 INFO L225 Difference]: With dead ends: 95 [2020-10-14 05:04:28,408 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 05:04:28,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=301, Invalid=2249, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:04:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 05:04:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-10-14 05:04:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 05:04:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-10-14 05:04:28,418 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 72 [2020-10-14 05:04:28,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:28,418 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-10-14 05:04:28,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:04:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-10-14 05:04:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 05:04:28,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:28,419 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:28,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:04:28,419 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:28,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:28,420 INFO L82 PathProgramCache]: Analyzing trace with hash 87505640, now seen corresponding path program 5 times [2020-10-14 05:04:28,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:28,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050415094] [2020-10-14 05:04:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:28,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:30,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:30,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 05:04:30,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:30,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2193 [2020-10-14 05:04:30,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:30,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:30,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:04:30,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:30,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 05:04:30,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:31,141 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-14 05:04:31,307 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-14 05:04:31,521 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-14 05:04:31,738 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-14 05:04:31,988 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-14 05:04:32,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:32,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:32,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:32,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:32,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:32,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:32,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:32,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:32,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:32,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:32,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:32,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:32,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050415094] [2020-10-14 05:04:32,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:32,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:04:32,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24152431] [2020-10-14 05:04:32,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:04:32,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:32,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:04:32,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:04:32,841 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 27 states. [2020-10-14 05:04:33,781 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 53 [2020-10-14 05:04:34,220 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 05:04:34,737 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 68 [2020-10-14 05:04:34,941 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 67 [2020-10-14 05:04:35,353 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2020-10-14 05:04:36,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:36,864 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2020-10-14 05:04:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 05:04:36,865 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-10-14 05:04:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:36,867 INFO L225 Difference]: With dead ends: 135 [2020-10-14 05:04:36,867 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 05:04:36,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=319, Invalid=3221, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 05:04:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 05:04:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2020-10-14 05:04:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 05:04:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2020-10-14 05:04:36,879 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 77 [2020-10-14 05:04:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:36,879 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2020-10-14 05:04:36,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:04:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2020-10-14 05:04:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 05:04:36,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:36,880 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:36,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:04:36,884 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:36,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1990525093, now seen corresponding path program 7 times [2020-10-14 05:04:36,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:36,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870717791] [2020-10-14 05:04:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:37,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:38,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:38,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 05:04:38,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:38,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2037 [2020-10-14 05:04:38,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:38,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:38,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:04:38,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:38,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 05:04:38,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:39,733 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-14 05:04:40,081 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-14 05:04:40,348 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-14 05:04:40,560 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-14 05:04:40,841 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-10-14 05:04:41,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:41,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:41,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:41,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:41,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:41,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:41,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:41,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:41,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:41,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:41,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:41,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 9 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:41,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870717791] [2020-10-14 05:04:41,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:41,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:04:41,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214228772] [2020-10-14 05:04:41,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:04:41,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:41,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:04:41,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:04:41,825 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand 27 states. [2020-10-14 05:04:42,768 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 45 [2020-10-14 05:04:43,098 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-14 05:04:43,455 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2020-10-14 05:04:43,719 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 73 [2020-10-14 05:04:43,951 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 68 [2020-10-14 05:04:44,336 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-14 05:04:44,697 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 59 [2020-10-14 05:04:46,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:46,040 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2020-10-14 05:04:46,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 05:04:46,041 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 82 [2020-10-14 05:04:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:46,042 INFO L225 Difference]: With dead ends: 147 [2020-10-14 05:04:46,042 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 05:04:46,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=297, Invalid=3009, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 05:04:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 05:04:46,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-10-14 05:04:46,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 05:04:46,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-10-14 05:04:46,057 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 82 [2020-10-14 05:04:46,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:46,057 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-10-14 05:04:46,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:04:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-10-14 05:04:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 05:04:46,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:46,058 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:46,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:04:46,058 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:46,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:46,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1009558461, now seen corresponding path program 6 times [2020-10-14 05:04:46,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:46,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406305652] [2020-10-14 05:04:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:46,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:47,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:47,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 05:04:47,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:47,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1528 [2020-10-14 05:04:47,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:47,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:47,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:04:47,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:47,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 05:04:47,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:48,113 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-14 05:04:48,491 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-14 05:04:48,736 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-14 05:04:48,970 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-14 05:04:49,235 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-10-14 05:04:49,405 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-14 05:04:50,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:50,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:50,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:50,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:50,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:50,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:50,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:50,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:50,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:50,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:50,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:50,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:50,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406305652] [2020-10-14 05:04:50,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:50,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:04:50,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237350907] [2020-10-14 05:04:50,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:04:50,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:50,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:04:50,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:04:50,185 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 28 states. [2020-10-14 05:04:51,304 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 50 [2020-10-14 05:04:51,516 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 45 [2020-10-14 05:04:51,966 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 54 [2020-10-14 05:04:52,271 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 63 [2020-10-14 05:04:52,501 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 62 [2020-10-14 05:04:52,720 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-14 05:04:53,039 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 96 [2020-10-14 05:04:53,245 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-14 05:04:53,473 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 71 [2020-10-14 05:04:53,885 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 99 [2020-10-14 05:04:54,276 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2020-10-14 05:04:54,747 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 97 [2020-10-14 05:04:56,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:56,109 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-14 05:04:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 05:04:56,109 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 83 [2020-10-14 05:04:56,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:56,110 INFO L225 Difference]: With dead ends: 108 [2020-10-14 05:04:56,110 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 05:04:56,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=344, Invalid=3438, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 05:04:56,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 05:04:56,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2020-10-14 05:04:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 05:04:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-10-14 05:04:56,123 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 83 [2020-10-14 05:04:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:56,123 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-10-14 05:04:56,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:04:56,124 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-10-14 05:04:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 05:04:56,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:56,124 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:56,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:04:56,125 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:56,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:56,125 INFO L82 PathProgramCache]: Analyzing trace with hash 877188336, now seen corresponding path program 8 times [2020-10-14 05:04:56,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:56,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964684706] [2020-10-14 05:04:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:56,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:57,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:57,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 05:04:57,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:57,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1750 [2020-10-14 05:04:57,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:57,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:57,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:04:57,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:57,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 05:04:57,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:58,449 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-14 05:04:58,912 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-14 05:04:59,188 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-14 05:04:59,501 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-14 05:05:00,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:00,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:00,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:00,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:00,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:00,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:00,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:00,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:00,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:00,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:00,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:00,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:00,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964684706] [2020-10-14 05:05:00,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:00,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:05:00,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394192681] [2020-10-14 05:05:00,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:05:00,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:00,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:05:00,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=801, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:05:00,711 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 30 states. [2020-10-14 05:05:01,848 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-14 05:05:02,042 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-10-14 05:05:02,710 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2020-10-14 05:05:02,983 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 78 [2020-10-14 05:05:03,257 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-10-14 05:05:03,428 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 05:05:03,642 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-14 05:05:03,850 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:05:04,109 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 82 [2020-10-14 05:05:04,538 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 111 [2020-10-14 05:05:04,755 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-14 05:05:06,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:06,657 INFO L93 Difference]: Finished difference Result 151 states and 154 transitions. [2020-10-14 05:05:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 05:05:06,659 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 88 [2020-10-14 05:05:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:06,660 INFO L225 Difference]: With dead ends: 151 [2020-10-14 05:05:06,660 INFO L226 Difference]: Without dead ends: 149 [2020-10-14 05:05:06,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=399, Invalid=4293, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 05:05:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-14 05:05:06,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2020-10-14 05:05:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 05:05:06,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2020-10-14 05:05:06,671 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 88 [2020-10-14 05:05:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:06,672 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2020-10-14 05:05:06,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:05:06,672 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2020-10-14 05:05:06,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-14 05:05:06,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:06,673 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:06,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:05:06,673 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:06,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:06,674 INFO L82 PathProgramCache]: Analyzing trace with hash -500529475, now seen corresponding path program 7 times [2020-10-14 05:05:06,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:06,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826670824] [2020-10-14 05:05:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:06,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:09,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:09,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-14 05:05:09,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:09,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2401 [2020-10-14 05:05:09,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:09,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:09,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:05:09,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:09,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-14 05:05:09,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:09,801 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-14 05:05:10,098 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-14 05:05:10,409 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-10-14 05:05:10,620 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-14 05:05:10,960 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-14 05:05:11,159 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-14 05:05:11,405 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-10-14 05:05:11,628 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-10-14 05:05:11,830 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-14 05:05:12,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:12,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:12,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:12,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:12,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:12,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:12,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:12,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:12,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:12,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:12,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:12,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 10 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:12,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826670824] [2020-10-14 05:05:12,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:12,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:05:12,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709501234] [2020-10-14 05:05:12,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:05:12,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:12,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:05:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:05:12,758 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand 30 states. [2020-10-14 05:05:13,575 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2020-10-14 05:05:14,092 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-14 05:05:14,467 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2020-10-14 05:05:14,730 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 73 [2020-10-14 05:05:14,988 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 68 [2020-10-14 05:05:15,388 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 05:05:15,613 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-14 05:05:15,874 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 79 [2020-10-14 05:05:16,229 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 95 [2020-10-14 05:05:16,451 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 66 [2020-10-14 05:05:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:18,545 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2020-10-14 05:05:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 05:05:18,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 93 [2020-10-14 05:05:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:18,548 INFO L225 Difference]: With dead ends: 163 [2020-10-14 05:05:18,548 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 05:05:18,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=354, Invalid=3936, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 05:05:18,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 05:05:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2020-10-14 05:05:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 05:05:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-10-14 05:05:18,559 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 93 [2020-10-14 05:05:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:18,562 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-10-14 05:05:18,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:05:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-10-14 05:05:18,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 05:05:18,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:18,563 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 6, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:18,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:05:18,563 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:18,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:18,564 INFO L82 PathProgramCache]: Analyzing trace with hash 586903353, now seen corresponding path program 9 times [2020-10-14 05:05:18,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:18,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137977466] [2020-10-14 05:05:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:18,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:21,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:21,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 05:05:21,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:21,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2456 [2020-10-14 05:05:21,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:21,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:21,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 05:05:21,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 05:05:21,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:21,856 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-14 05:05:22,131 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-14 05:05:22,431 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-14 05:05:22,587 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-14 05:05:22,832 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-10-14 05:05:23,248 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 91 [2020-10-14 05:05:23,525 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-10-14 05:05:23,743 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-14 05:05:24,039 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 102 [2020-10-14 05:05:24,266 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-10-14 05:05:24,563 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-10-14 05:05:25,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:25,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:25,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:25,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:25,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:25,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:25,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:25,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:25,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:25,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:25,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:25,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:25,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137977466] [2020-10-14 05:05:25,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:25,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:05:25,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832602830] [2020-10-14 05:05:25,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:05:25,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:25,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:05:25,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:05:25,514 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 31 states. [2020-10-14 05:05:27,017 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 56 [2020-10-14 05:05:27,272 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 48 [2020-10-14 05:05:27,624 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2020-10-14 05:05:28,091 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 61 [2020-10-14 05:05:28,497 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 80 [2020-10-14 05:05:28,829 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 66 [2020-10-14 05:05:29,117 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-14 05:05:29,533 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 99 [2020-10-14 05:05:29,849 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-10-14 05:05:30,226 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 86 [2020-10-14 05:05:30,850 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 110 [2020-10-14 05:05:31,201 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 91 [2020-10-14 05:05:31,455 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-14 05:05:31,815 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 106 [2020-10-14 05:05:32,348 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 68 [2020-10-14 05:05:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:34,998 INFO L93 Difference]: Finished difference Result 157 states and 160 transitions. [2020-10-14 05:05:35,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 05:05:35,000 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 94 [2020-10-14 05:05:35,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:35,001 INFO L225 Difference]: With dead ends: 157 [2020-10-14 05:05:35,001 INFO L226 Difference]: Without dead ends: 155 [2020-10-14 05:05:35,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=425, Invalid=4831, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 05:05:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-14 05:05:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 147. [2020-10-14 05:05:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 05:05:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2020-10-14 05:05:35,014 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 94 [2020-10-14 05:05:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:35,014 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2020-10-14 05:05:35,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:05:35,014 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2020-10-14 05:05:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 05:05:35,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:35,016 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:35,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:05:35,016 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:35,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1717964268, now seen corresponding path program 8 times [2020-10-14 05:05:35,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:35,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504695270] [2020-10-14 05:05:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:35,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:37,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:37,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 05:05:37,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:37,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2469 [2020-10-14 05:05:37,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:37,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:37,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 05:05:37,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:37,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-14 05:05:37,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:38,538 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-14 05:05:38,857 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-14 05:05:38,993 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-14 05:05:39,219 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-10-14 05:05:39,580 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 87 [2020-10-14 05:05:39,858 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2020-10-14 05:05:40,018 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-14 05:05:40,260 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2020-10-14 05:05:41,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:41,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:41,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:41,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:41,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:41,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:41,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:41,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:41,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:41,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:41,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:41,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:41,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504695270] [2020-10-14 05:05:41,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:41,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:05:41,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848123077] [2020-10-14 05:05:41,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:05:41,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:41,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:05:41,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:05:41,628 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand 33 states. [2020-10-14 05:05:42,704 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 50 [2020-10-14 05:05:43,408 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 54 [2020-10-14 05:05:43,713 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 68 [2020-10-14 05:05:43,966 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 65 [2020-10-14 05:05:44,224 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-14 05:05:44,544 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 102 [2020-10-14 05:05:44,810 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-14 05:05:45,116 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 78 [2020-10-14 05:05:45,498 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 88 [2020-10-14 05:05:45,826 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 87 [2020-10-14 05:05:46,054 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-14 05:05:46,453 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 123 [2020-10-14 05:05:46,908 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 70 [2020-10-14 05:05:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:49,052 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2020-10-14 05:05:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 05:05:49,053 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 99 [2020-10-14 05:05:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:49,055 INFO L225 Difference]: With dead ends: 162 [2020-10-14 05:05:49,055 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 05:05:49,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=406, Invalid=4996, Unknown=0, NotChecked=0, Total=5402 [2020-10-14 05:05:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 05:05:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 123. [2020-10-14 05:05:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 05:05:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2020-10-14 05:05:49,067 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 99 [2020-10-14 05:05:49,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:49,067 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2020-10-14 05:05:49,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:05:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2020-10-14 05:05:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 05:05:49,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:49,068 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 7, 7, 6, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:49,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:05:49,069 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1252983940, now seen corresponding path program 10 times [2020-10-14 05:05:49,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:49,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934731587] [2020-10-14 05:05:49,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:49,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:51,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:51,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 05:05:51,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:51,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2478 [2020-10-14 05:05:51,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:51,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:51,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 05:05:51,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:51,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 05:05:51,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:52,518 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-14 05:05:53,082 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-10-14 05:05:53,503 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 90 [2020-10-14 05:05:53,834 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 82 [2020-10-14 05:05:54,046 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2020-10-14 05:05:54,333 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 92 [2020-10-14 05:05:54,723 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2020-10-14 05:05:55,033 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-14 05:05:55,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:55,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:55,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:55,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:55,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:55,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:55,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:55,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:55,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:55,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:55,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:55,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 317 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:05:55,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934731587] [2020-10-14 05:05:55,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:55,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:05:55,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891431591] [2020-10-14 05:05:55,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:05:55,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:55,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:05:55,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:05:55,950 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand 32 states. [2020-10-14 05:05:57,068 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 48 [2020-10-14 05:05:57,365 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 59 [2020-10-14 05:05:57,628 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 73 [2020-10-14 05:05:57,904 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 66 [2020-10-14 05:05:58,151 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-14 05:05:58,516 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 89 [2020-10-14 05:05:58,799 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-14 05:05:59,187 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2020-10-14 05:05:59,600 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 114 [2020-10-14 05:05:59,948 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-14 05:06:00,556 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 105 [2020-10-14 05:06:01,161 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 92 [2020-10-14 05:06:01,454 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 105 [2020-10-14 05:06:02,054 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 100 [2020-10-14 05:06:02,546 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-14 05:06:03,033 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-10-14 05:06:03,311 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-14 05:06:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:03,352 INFO L93 Difference]: Finished difference Result 163 states and 166 transitions. [2020-10-14 05:06:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 05:06:03,355 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 100 [2020-10-14 05:06:03,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:03,356 INFO L225 Difference]: With dead ends: 163 [2020-10-14 05:06:03,356 INFO L226 Difference]: Without dead ends: 161 [2020-10-14 05:06:03,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=307, Invalid=3475, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 05:06:03,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-14 05:06:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2020-10-14 05:06:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-14 05:06:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2020-10-14 05:06:03,370 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 100 [2020-10-14 05:06:03,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:03,371 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2020-10-14 05:06:03,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:06:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2020-10-14 05:06:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 05:06:03,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:03,372 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:03,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:06:03,373 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:03,373 INFO L82 PathProgramCache]: Analyzing trace with hash -512629511, now seen corresponding path program 11 times [2020-10-14 05:06:03,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:03,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049036470] [2020-10-14 05:06:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:03,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:06,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:06,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 05:06:06,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:06,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2715 [2020-10-14 05:06:06,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:06,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:06,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 05:06:06,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:06,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 05:06:06,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:07,255 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2020-10-14 05:06:07,438 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-14 05:06:07,673 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-14 05:06:07,805 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-14 05:06:08,113 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2020-10-14 05:06:08,344 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2020-10-14 05:06:08,843 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 99 [2020-10-14 05:06:09,048 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2020-10-14 05:06:09,342 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 68 [2020-10-14 05:06:10,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:10,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:10,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:10,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:10,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:10,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:10,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:10,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:10,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:10,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:10,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:10,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 12 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:10,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049036470] [2020-10-14 05:06:10,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:10,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:06:10,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490526703] [2020-10-14 05:06:10,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:06:10,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:10,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:06:10,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:06:10,659 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand 33 states. [2020-10-14 05:06:11,572 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2020-10-14 05:06:12,142 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-14 05:06:12,544 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2020-10-14 05:06:12,829 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 73 [2020-10-14 05:06:13,093 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 68 [2020-10-14 05:06:13,529 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 05:06:13,782 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-14 05:06:14,068 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 79 [2020-10-14 05:06:14,455 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 93 [2020-10-14 05:06:14,779 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 88 [2020-10-14 05:06:15,013 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 05:06:15,369 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 107 [2020-10-14 05:06:15,870 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 73 [2020-10-14 05:06:18,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:18,110 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2020-10-14 05:06:18,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 05:06:18,110 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 104 [2020-10-14 05:06:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:18,112 INFO L225 Difference]: With dead ends: 179 [2020-10-14 05:06:18,112 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 05:06:18,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=385, Invalid=5017, Unknown=0, NotChecked=0, Total=5402 [2020-10-14 05:06:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 05:06:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2020-10-14 05:06:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 05:06:18,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-10-14 05:06:18,128 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 104 [2020-10-14 05:06:18,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:18,129 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-10-14 05:06:18,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:06:18,129 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-10-14 05:06:18,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-14 05:06:18,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:18,134 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 7, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:18,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:06:18,135 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:18,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:18,135 INFO L82 PathProgramCache]: Analyzing trace with hash 198636457, now seen corresponding path program 9 times [2020-10-14 05:06:18,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:18,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701834777] [2020-10-14 05:06:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:18,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:21,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:21,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-14 05:06:21,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:21,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3626 [2020-10-14 05:06:21,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:21,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:21,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 05:06:21,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:21,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-14 05:06:21,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:22,695 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-14 05:06:22,832 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-14 05:06:23,092 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-10-14 05:06:23,494 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2020-10-14 05:06:24,059 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 86 [2020-10-14 05:06:24,397 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 79 [2020-10-14 05:06:24,574 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-14 05:06:24,848 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 88 [2020-10-14 05:06:25,039 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-14 05:06:25,270 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-14 05:06:25,685 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 111 [2020-10-14 05:06:26,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:26,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:26,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:26,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:26,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:26,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:26,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:26,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:26,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:26,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:26,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:26,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:27,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701834777] [2020-10-14 05:06:27,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:27,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 05:06:27,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639569277] [2020-10-14 05:06:27,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 05:06:27,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:27,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 05:06:27,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:06:27,096 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 35 states. [2020-10-14 05:06:28,252 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 50 [2020-10-14 05:06:28,479 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 45 [2020-10-14 05:06:29,034 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 55 [2020-10-14 05:06:29,346 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 68 [2020-10-14 05:06:29,625 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 63 [2020-10-14 05:06:29,901 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-14 05:06:30,229 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 101 [2020-10-14 05:06:30,497 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-14 05:06:30,822 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 78 [2020-10-14 05:06:31,273 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 88 [2020-10-14 05:06:31,638 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 87 [2020-10-14 05:06:31,889 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-14 05:06:32,284 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-10-14 05:06:32,756 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 125 [2020-10-14 05:06:33,391 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 127 [2020-10-14 05:06:34,075 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 128 [2020-10-14 05:06:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:36,458 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-10-14 05:06:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 05:06:36,459 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 105 [2020-10-14 05:06:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:36,460 INFO L225 Difference]: With dead ends: 128 [2020-10-14 05:06:36,460 INFO L226 Difference]: Without dead ends: 126 [2020-10-14 05:06:36,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=427, Invalid=5425, Unknown=0, NotChecked=0, Total=5852 [2020-10-14 05:06:36,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-14 05:06:36,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2020-10-14 05:06:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-14 05:06:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2020-10-14 05:06:36,470 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 105 [2020-10-14 05:06:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:36,471 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2020-10-14 05:06:36,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 05:06:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2020-10-14 05:06:36,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 05:06:36,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:36,472 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:36,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:06:36,472 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:36,473 INFO L82 PathProgramCache]: Analyzing trace with hash 7313540, now seen corresponding path program 12 times [2020-10-14 05:06:36,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:36,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765405151] [2020-10-14 05:06:36,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:36,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:39,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:39,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 05:06:39,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:39,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3175 [2020-10-14 05:06:39,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:39,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:39,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 05:06:39,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:39,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-14 05:06:39,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:40,802 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-14 05:06:41,098 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2020-10-14 05:06:41,230 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-14 05:06:41,523 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-14 05:06:41,738 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-14 05:06:42,170 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2020-10-14 05:06:42,401 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-10-14 05:06:42,835 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 92 [2020-10-14 05:06:43,447 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 99 [2020-10-14 05:06:43,933 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 96 [2020-10-14 05:06:44,266 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-14 05:06:45,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:45,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:45,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:45,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:45,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:45,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:45,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:45,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:45,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:45,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:45,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:45,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:45,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765405151] [2020-10-14 05:06:45,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:45,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 05:06:45,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158239729] [2020-10-14 05:06:45,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 05:06:45,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:45,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 05:06:45,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1099, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:06:45,549 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand 35 states. [2020-10-14 05:06:45,882 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 19 [2020-10-14 05:06:46,116 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 26 [2020-10-14 05:06:46,391 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 27 [2020-10-14 05:06:46,756 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 40 [2020-10-14 05:06:47,057 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 54 [2020-10-14 05:06:47,349 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 45 [2020-10-14 05:06:47,838 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 59 [2020-10-14 05:06:48,272 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 72 [2020-10-14 05:06:48,603 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 63 [2020-10-14 05:06:49,125 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 76 [2020-10-14 05:06:49,675 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 90 [2020-10-14 05:06:50,065 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 81 [2020-10-14 05:06:50,450 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-10-14 05:06:50,945 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 120 [2020-10-14 05:06:51,319 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2020-10-14 05:06:51,756 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 101 [2020-10-14 05:06:52,564 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 138 [2020-10-14 05:06:52,902 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 76 [2020-10-14 05:06:53,548 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 62 [2020-10-14 05:06:53,868 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 56 [2020-10-14 05:06:54,121 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 17 [2020-10-14 05:06:54,458 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 15 [2020-10-14 05:06:54,697 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 11 [2020-10-14 05:06:55,137 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 50 [2020-10-14 05:06:55,429 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 46 [2020-10-14 05:06:55,950 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 41 [2020-10-14 05:06:56,222 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 36 [2020-10-14 05:06:56,713 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 31 [2020-10-14 05:06:56,949 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 26 [2020-10-14 05:06:57,375 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 19 [2020-10-14 05:06:57,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:57,431 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2020-10-14 05:06:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 05:06:57,432 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 110 [2020-10-14 05:06:57,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:57,433 INFO L225 Difference]: With dead ends: 183 [2020-10-14 05:06:57,433 INFO L226 Difference]: Without dead ends: 181 [2020-10-14 05:06:57,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=448, Invalid=5102, Unknown=0, NotChecked=0, Total=5550 [2020-10-14 05:06:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-14 05:06:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 173. [2020-10-14 05:06:57,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-14 05:06:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2020-10-14 05:06:57,448 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 110 [2020-10-14 05:06:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:57,448 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2020-10-14 05:06:57,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 05:06:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2020-10-14 05:06:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-14 05:06:57,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:57,449 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:57,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:06:57,450 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:57,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:57,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2069028777, now seen corresponding path program 10 times [2020-10-14 05:06:57,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:57,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333848345] [2020-10-14 05:06:57,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:57,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:01,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:01,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 05:07:01,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:01,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3489 [2020-10-14 05:07:01,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:01,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:01,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 05:07:01,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:07:01,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-14 05:07:01,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:01,733 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-14 05:07:02,088 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-14 05:07:02,369 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-14 05:07:02,515 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-14 05:07:02,837 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-10-14 05:07:03,002 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-14 05:07:03,316 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-10-14 05:07:03,516 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-10-14 05:07:04,176 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2020-10-14 05:07:04,780 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 103 [2020-10-14 05:07:05,118 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 100 [2020-10-14 05:07:05,531 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2020-10-14 05:07:05,810 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2020-10-14 05:07:06,369 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-14 05:07:07,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:07:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:07,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:07,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:07,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:07:07,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:07,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:07:07,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:07,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:07,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:07:07,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:07:07,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:07:07,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 13 proven. 412 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:07:07,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333848345] [2020-10-14 05:07:07,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:07:07,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 05:07:07,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091914747] [2020-10-14 05:07:07,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 05:07:07,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:07:07,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 05:07:07,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:07:07,695 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand 36 states. [2020-10-14 05:07:09,109 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-14 05:07:09,352 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2020-10-14 05:07:09,730 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-14 05:07:10,188 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2020-10-14 05:07:10,513 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 75 [2020-10-14 05:07:10,843 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2020-10-14 05:07:11,070 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-14 05:07:11,404 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-14 05:07:11,690 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 05:07:12,014 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2020-10-14 05:07:12,487 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 95 [2020-10-14 05:07:12,899 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 90 [2020-10-14 05:07:13,221 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-14 05:07:13,672 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2020-10-14 05:07:14,068 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-14 05:07:14,505 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 102 [2020-10-14 05:07:15,142 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 124 [2020-10-14 05:07:15,493 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2020-10-14 05:07:15,718 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 05:07:16,016 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-14 05:07:16,356 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 75 [2020-10-14 05:07:16,631 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 69 [2020-10-14 05:07:17,194 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 63 [2020-10-14 05:07:19,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:07:19,217 INFO L93 Difference]: Finished difference Result 194 states and 198 transitions. [2020-10-14 05:07:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 05:07:19,218 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 115 [2020-10-14 05:07:19,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:07:19,219 INFO L225 Difference]: With dead ends: 194 [2020-10-14 05:07:19,219 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 05:07:19,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=410, Invalid=6562, Unknown=0, NotChecked=0, Total=6972 [2020-10-14 05:07:19,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 05:07:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2020-10-14 05:07:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-14 05:07:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2020-10-14 05:07:19,232 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 115 [2020-10-14 05:07:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:07:19,233 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2020-10-14 05:07:19,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 05:07:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2020-10-14 05:07:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 05:07:19,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:07:19,234 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 8, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:07:19,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:07:19,234 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:07:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:07:19,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1036938381, now seen corresponding path program 13 times [2020-10-14 05:07:19,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:07:19,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335210259] [2020-10-14 05:07:19,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:07:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:19,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking...