/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/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:51:27,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:51:27,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:51:27,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:51:27,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:51:27,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:51:27,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:51:27,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:51:27,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:51:27,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:51:27,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:51:27,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:51:27,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:51:27,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:51:27,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:51:27,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:51:27,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:51:27,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:51:27,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:51:27,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:51:27,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:51:27,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:51:27,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:51:27,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:51:27,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:51:27,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:51:27,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:51:27,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:51:27,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:51:27,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:51:27,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:51:27,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:51:27,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:51:27,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:51:27,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:51:27,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:51:27,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:51:27,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:51:27,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:51:27,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:51:27,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:51:27,716 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 08:51:27,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:51:27,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:51:27,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:51:27,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:51:27,744 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:51:27,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:51:27,744 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:51:27,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:51:27,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:51:27,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:51:27,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:51:27,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:51:27,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:51:27,745 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:51:27,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:51:27,746 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:51:27,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:51:27,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:51:27,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:51:27,747 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:51:27,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:51:27,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:51:27,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:51:27,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:51:27,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:51:27,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:51:27,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:51:27,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:51:27,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:51:27,749 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 08:51:28,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:51:28,080 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:51:28,083 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:51:28,085 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:51:28,085 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:51:28,086 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-14 08:51:28,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff75e2f96/a31bfa2626034461ba8d382d3eb99052/FLAG0a0005347 [2020-10-14 08:51:28,637 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:51:28,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-14 08:51:28,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff75e2f96/a31bfa2626034461ba8d382d3eb99052/FLAG0a0005347 [2020-10-14 08:51:28,909 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff75e2f96/a31bfa2626034461ba8d382d3eb99052 [2020-10-14 08:51:28,917 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:51:28,919 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:51:28,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:51:28,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:51:28,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:51:28,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:51:28" (1/1) ... [2020-10-14 08:51:28,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a0cc214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:28, skipping insertion in model container [2020-10-14 08:51:28,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:51:28" (1/1) ... [2020-10-14 08:51:28,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:51:28,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:51:29,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:51:29,368 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:51:29,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:51:29,594 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:51:29,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:29 WrapperNode [2020-10-14 08:51:29,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:51:29,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:51:29,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:51:29,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:51:29,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:29" (1/1) ... [2020-10-14 08:51:29,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:29" (1/1) ... [2020-10-14 08:51:29,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:29" (1/1) ... [2020-10-14 08:51:29,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:29" (1/1) ... [2020-10-14 08:51:29,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:29" (1/1) ... [2020-10-14 08:51:29,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:29" (1/1) ... [2020-10-14 08:51:29,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:29" (1/1) ... [2020-10-14 08:51:29,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:51:29,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:51:29,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:51:29,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:51:29,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:29" (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 08:51:29,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:51:29,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:51:29,719 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:51:29,720 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:51:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:51:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:51:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:51:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:51:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:51:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:51:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:51:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:51:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:51:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:51:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:51:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 08:51:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 08:51:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-14 08:51:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:51:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:51:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:51:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:51:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:51:30,385 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:51:30,385 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:51:30,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:51:30 BoogieIcfgContainer [2020-10-14 08:51:30,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:51:30,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:51:30,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:51:30,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:51:30,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:51:28" (1/3) ... [2020-10-14 08:51:30,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3414fff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:51:30, skipping insertion in model container [2020-10-14 08:51:30,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:29" (2/3) ... [2020-10-14 08:51:30,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3414fff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:51:30, skipping insertion in model container [2020-10-14 08:51:30,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:51:30" (3/3) ... [2020-10-14 08:51:30,400 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-14 08:51:30,412 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:51:30,420 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:51:30,434 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:51:30,464 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:51:30,464 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:51:30,464 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:51:30,464 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:51:30,465 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:51:30,465 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:51:30,465 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:51:30,465 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:51:30,488 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states. [2020-10-14 08:51:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 08:51:30,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:51:30,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:51:30,500 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:51:30,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:51:30,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1263319593, now seen corresponding path program 1 times [2020-10-14 08:51:30,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:51:30,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762839805] [2020-10-14 08:51:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:51:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:30,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:31,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:31,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:31,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:31,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:32,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:32,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:35,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:35,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 08:51:35,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:51:35,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 08:51:35,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:35,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:35,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:51:35,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:51:35,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 08:51:35,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 08:51:36,272 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:51:36,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:51:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:36,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:36,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:36,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:51:36,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:51:36,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 08:51:36,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:36,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:36,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:51:36,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:51:36,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:51:36,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 08:51:36,342 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 08:51:36,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762839805] [2020-10-14 08:51:36,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:51:36,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:51:36,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141024208] [2020-10-14 08:51:36,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:51:36,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:51:36,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:51:36,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:51:36,373 INFO L87 Difference]: Start difference. First operand 121 states. Second operand 4 states. [2020-10-14 08:51:36,715 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:51:37,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:51:37,821 INFO L93 Difference]: Finished difference Result 261 states and 423 transitions. [2020-10-14 08:51:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:51:37,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-14 08:51:37,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:51:37,837 INFO L225 Difference]: With dead ends: 261 [2020-10-14 08:51:37,837 INFO L226 Difference]: Without dead ends: 179 [2020-10-14 08:51:37,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:51:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-14 08:51:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-14 08:51:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-14 08:51:37,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 254 transitions. [2020-10-14 08:51:37,904 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 254 transitions. Word has length 76 [2020-10-14 08:51:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:51:37,905 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 254 transitions. [2020-10-14 08:51:37,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:51:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 254 transitions. [2020-10-14 08:51:37,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 08:51:37,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:51:37,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:51:37,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:51:37,912 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:51:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:51:37,914 INFO L82 PathProgramCache]: Analyzing trace with hash -464852991, now seen corresponding path program 1 times [2020-10-14 08:51:37,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:51:37,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173356062] [2020-10-14 08:51:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:51:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:37,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:38,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:38,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:38,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:38,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:42,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:42,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 08:51:42,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:51:42,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 08:51:42,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:42,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:51:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 08:51:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:51:42,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-14 08:51:43,300 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:51:43,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:51:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:43,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:43,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:43,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:51:43,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:51:43,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 08:51:43,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:43,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:43,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:51:43,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:51:43,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:51:43,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:51:43,356 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 08:51:43,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173356062] [2020-10-14 08:51:43,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:51:43,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:51:43,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654680802] [2020-10-14 08:51:43,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:51:43,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:51:43,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:51:43,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:51:43,362 INFO L87 Difference]: Start difference. First operand 177 states and 254 transitions. Second operand 4 states. [2020-10-14 08:51:43,611 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:51:44,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:51:44,190 INFO L93 Difference]: Finished difference Result 421 states and 642 transitions. [2020-10-14 08:51:44,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:51:44,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 08:51:44,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:51:44,198 INFO L225 Difference]: With dead ends: 421 [2020-10-14 08:51:44,198 INFO L226 Difference]: Without dead ends: 291 [2020-10-14 08:51:44,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:51:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-14 08:51:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2020-10-14 08:51:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-14 08:51:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 432 transitions. [2020-10-14 08:51:44,262 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 432 transitions. Word has length 77 [2020-10-14 08:51:44,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:51:44,263 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 432 transitions. [2020-10-14 08:51:44,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:51:44,263 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 432 transitions. [2020-10-14 08:51:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 08:51:44,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:51:44,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:51:44,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:51:44,267 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:51:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:51:44,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2021386569, now seen corresponding path program 1 times [2020-10-14 08:51:44,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:51:44,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707965333] [2020-10-14 08:51:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:51:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:44,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:44,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:44,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:44,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:45,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:45,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:49,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:49,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 08:51:49,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:51:49,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 08:51:49,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:49,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:49,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:51:49,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 08:51:49,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:51:49,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:51:49,541 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:51:49,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:51:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:49,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:49,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:49,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:51:49,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:51:49,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 08:51:49,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:49,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:49,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:51:49,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:51:49,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:51:49,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:51:49,587 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 08:51:49,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707965333] [2020-10-14 08:51:49,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:51:49,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:51:49,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618887642] [2020-10-14 08:51:49,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:51:49,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:51:49,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:51:49,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:51:49,590 INFO L87 Difference]: Start difference. First operand 289 states and 432 transitions. Second operand 4 states. [2020-10-14 08:51:49,786 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:51:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:51:50,367 INFO L93 Difference]: Finished difference Result 741 states and 1150 transitions. [2020-10-14 08:51:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:51:50,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-14 08:51:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:51:50,372 INFO L225 Difference]: With dead ends: 741 [2020-10-14 08:51:50,372 INFO L226 Difference]: Without dead ends: 499 [2020-10-14 08:51:50,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:51:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-14 08:51:50,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2020-10-14 08:51:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-14 08:51:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 760 transitions. [2020-10-14 08:51:50,406 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 760 transitions. Word has length 78 [2020-10-14 08:51:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:51:50,406 INFO L479 AbstractCegarLoop]: Abstraction has 497 states and 760 transitions. [2020-10-14 08:51:50,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:51:50,407 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 760 transitions. [2020-10-14 08:51:50,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 08:51:50,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:51:50,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:51:50,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:51:50,409 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:51:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:51:50,409 INFO L82 PathProgramCache]: Analyzing trace with hash 539012931, now seen corresponding path program 1 times [2020-10-14 08:51:50,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:51:50,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108751463] [2020-10-14 08:51:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:51:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:50,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:50,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:50,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:50,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:50,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:55,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:55,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 08:51:55,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:51:55,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-14 08:51:55,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:55,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:51:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 08:51:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 08:51:55,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:51:55,688 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:51:55,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:51:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:55,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:55,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:55,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:51:55,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:51:55,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 08:51:55,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:55,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:51:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:51:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:51:55,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:51:55,731 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 08:51:55,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108751463] [2020-10-14 08:51:55,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:51:55,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:51:55,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628977793] [2020-10-14 08:51:55,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:51:55,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:51:55,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:51:55,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:51:55,736 INFO L87 Difference]: Start difference. First operand 497 states and 760 transitions. Second operand 4 states. [2020-10-14 08:51:55,952 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:51:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:51:56,609 INFO L93 Difference]: Finished difference Result 1333 states and 2082 transitions. [2020-10-14 08:51:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:51:56,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-14 08:51:56,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:51:56,622 INFO L225 Difference]: With dead ends: 1333 [2020-10-14 08:51:56,622 INFO L226 Difference]: Without dead ends: 883 [2020-10-14 08:51:56,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:51:56,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2020-10-14 08:51:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 881. [2020-10-14 08:51:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 881 states. [2020-10-14 08:51:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1360 transitions. [2020-10-14 08:51:56,671 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1360 transitions. Word has length 79 [2020-10-14 08:51:56,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:51:56,672 INFO L479 AbstractCegarLoop]: Abstraction has 881 states and 1360 transitions. [2020-10-14 08:51:56,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:51:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1360 transitions. [2020-10-14 08:51:56,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 08:51:56,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:51:56,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:51:56,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:51:56,682 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:51:56,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:51:56,683 INFO L82 PathProgramCache]: Analyzing trace with hash 787360027, now seen corresponding path program 1 times [2020-10-14 08:51:56,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:51:56,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334827341] [2020-10-14 08:51:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:51:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:56,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:56,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:56,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:57,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:57,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:57,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:01,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:01,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 08:52:01,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:52:01,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:52:01,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:01,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:01,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:01,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 08:52:01,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 08:52:01,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:01,926 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:52:01,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:01,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:01,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:01,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:01,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:01,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:52:01,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:01,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:01,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:01,965 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 08:52:01,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334827341] [2020-10-14 08:52:01,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:01,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:52:01,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997021497] [2020-10-14 08:52:01,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:52:01,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:01,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:52:01,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:52:01,968 INFO L87 Difference]: Start difference. First operand 881 states and 1360 transitions. Second operand 4 states. [2020-10-14 08:52:02,160 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:52:02,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:02,813 INFO L93 Difference]: Finished difference Result 2421 states and 3778 transitions. [2020-10-14 08:52:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:52:02,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 08:52:02,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:02,823 INFO L225 Difference]: With dead ends: 2421 [2020-10-14 08:52:02,824 INFO L226 Difference]: Without dead ends: 1587 [2020-10-14 08:52:02,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:52:02,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2020-10-14 08:52:02,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1585. [2020-10-14 08:52:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1585 states. [2020-10-14 08:52:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2448 transitions. [2020-10-14 08:52:02,912 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2448 transitions. Word has length 80 [2020-10-14 08:52:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:02,912 INFO L479 AbstractCegarLoop]: Abstraction has 1585 states and 2448 transitions. [2020-10-14 08:52:02,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:52:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2448 transitions. [2020-10-14 08:52:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 08:52:02,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:02,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:52:02,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:52:02,915 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:02,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:02,915 INFO L82 PathProgramCache]: Analyzing trace with hash 63576022, now seen corresponding path program 1 times [2020-10-14 08:52:02,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:02,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073625448] [2020-10-14 08:52:02,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:02,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:02,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:03,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:03,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:04,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:04,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:05,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:05,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:07,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:07,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 08:52:07,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:52:07,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:52:07,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:07,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:52:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:52:07,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:08,174 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:52:08,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:08,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:08,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:08,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:08,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:08,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:52:08,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:08,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:08,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:08,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:08,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:08,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:08,226 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 08:52:08,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073625448] [2020-10-14 08:52:08,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:08,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:52:08,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299929608] [2020-10-14 08:52:08,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:52:08,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:52:08,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:52:08,229 INFO L87 Difference]: Start difference. First operand 1585 states and 2448 transitions. Second operand 4 states. [2020-10-14 08:52:08,500 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:52:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:09,232 INFO L93 Difference]: Finished difference Result 4405 states and 6834 transitions. [2020-10-14 08:52:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:52:09,233 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 08:52:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:09,248 INFO L225 Difference]: With dead ends: 4405 [2020-10-14 08:52:09,249 INFO L226 Difference]: Without dead ends: 2867 [2020-10-14 08:52:09,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:52:09,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2020-10-14 08:52:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2865. [2020-10-14 08:52:09,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-10-14 08:52:09,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4400 transitions. [2020-10-14 08:52:09,396 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4400 transitions. Word has length 81 [2020-10-14 08:52:09,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:09,396 INFO L479 AbstractCegarLoop]: Abstraction has 2865 states and 4400 transitions. [2020-10-14 08:52:09,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:52:09,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4400 transitions. [2020-10-14 08:52:09,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:52:09,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:09,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:52:09,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:52:09,398 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:09,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:09,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2026633872, now seen corresponding path program 1 times [2020-10-14 08:52:09,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:09,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811586202] [2020-10-14 08:52:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:09,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:09,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:09,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:09,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:09,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:10,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:11,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:11,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:11,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:11,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:11,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:14,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:14,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:52:14,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 08:52:14,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:52:14,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:14,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:52:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:52:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 08:52:14,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:14,666 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:52:14,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:14,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:14,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:14,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:14,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:14,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-14 08:52:14,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:14,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:14,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:14,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:14,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:52:14,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:14,720 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 08:52:14,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811586202] [2020-10-14 08:52:14,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:14,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:52:14,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099895887] [2020-10-14 08:52:14,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:52:14,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:14,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:52:14,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:52:14,722 INFO L87 Difference]: Start difference. First operand 2865 states and 4400 transitions. Second operand 6 states. [2020-10-14 08:52:14,915 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-14 08:52:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:15,690 INFO L93 Difference]: Finished difference Result 8469 states and 13042 transitions. [2020-10-14 08:52:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:52:15,691 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:52:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:15,733 INFO L225 Difference]: With dead ends: 8469 [2020-10-14 08:52:15,733 INFO L226 Difference]: Without dead ends: 5651 [2020-10-14 08:52:15,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:52:15,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2020-10-14 08:52:16,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 5649. [2020-10-14 08:52:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5649 states. [2020-10-14 08:52:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5649 states to 5649 states and 8656 transitions. [2020-10-14 08:52:16,170 INFO L78 Accepts]: Start accepts. Automaton has 5649 states and 8656 transitions. Word has length 82 [2020-10-14 08:52:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:16,170 INFO L479 AbstractCegarLoop]: Abstraction has 5649 states and 8656 transitions. [2020-10-14 08:52:16,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:52:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 5649 states and 8656 transitions. [2020-10-14 08:52:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:52:16,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:16,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:52:16,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:52:16,172 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:16,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash -752765867, now seen corresponding path program 1 times [2020-10-14 08:52:16,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:16,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473859875] [2020-10-14 08:52:16,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:16,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:16,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:16,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:16,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:16,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:16,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:18,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:21,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:21,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:52:21,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:52:21,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:52:21,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:21,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:21,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:52:21,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:52:21,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 08:52:21,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:21,455 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:52:21,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:21,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:21,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:21,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:21,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:21,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 08:52:21,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:21,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:21,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:21,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:21,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:52:21,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:21,504 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 08:52:21,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473859875] [2020-10-14 08:52:21,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:21,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:52:21,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592287737] [2020-10-14 08:52:21,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:52:21,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:21,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:52:21,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:52:21,507 INFO L87 Difference]: Start difference. First operand 5649 states and 8656 transitions. Second operand 6 states. [2020-10-14 08:52:21,689 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-14 08:52:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:22,666 INFO L93 Difference]: Finished difference Result 16789 states and 25746 transitions. [2020-10-14 08:52:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:52:22,667 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:52:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:22,721 INFO L225 Difference]: With dead ends: 16789 [2020-10-14 08:52:22,722 INFO L226 Difference]: Without dead ends: 11187 [2020-10-14 08:52:22,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:52:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11187 states. [2020-10-14 08:52:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11187 to 11185. [2020-10-14 08:52:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11185 states. [2020-10-14 08:52:23,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11185 states to 11185 states and 17072 transitions. [2020-10-14 08:52:23,420 INFO L78 Accepts]: Start accepts. Automaton has 11185 states and 17072 transitions. Word has length 82 [2020-10-14 08:52:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:23,421 INFO L479 AbstractCegarLoop]: Abstraction has 11185 states and 17072 transitions. [2020-10-14 08:52:23,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:52:23,421 INFO L276 IsEmpty]: Start isEmpty. Operand 11185 states and 17072 transitions. [2020-10-14 08:52:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:52:23,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:23,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:52:23,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:52:23,422 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:23,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:23,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1700170896, now seen corresponding path program 1 times [2020-10-14 08:52:23,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:23,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340273018] [2020-10-14 08:52:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:23,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:23,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:23,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:23,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:25,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:25,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:52:25,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:52:25,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2038 [2020-10-14 08:52:25,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:25,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:25,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:52:25,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:52:25,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 08:52:25,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:25,678 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:52:25,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:25,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:25,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:25,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:25,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:25,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 08:52:25,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:25,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:25,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:25,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:25,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:52:25,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:25,722 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 08:52:25,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340273018] [2020-10-14 08:52:25,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:25,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:52:25,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31512537] [2020-10-14 08:52:25,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:52:25,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:25,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:52:25,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:52:25,725 INFO L87 Difference]: Start difference. First operand 11185 states and 17072 transitions. Second operand 6 states. [2020-10-14 08:52:25,972 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-14 08:52:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:27,151 INFO L93 Difference]: Finished difference Result 33333 states and 50866 transitions. [2020-10-14 08:52:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:52:27,151 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:52:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:27,213 INFO L225 Difference]: With dead ends: 33333 [2020-10-14 08:52:27,214 INFO L226 Difference]: Without dead ends: 22195 [2020-10-14 08:52:27,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:52:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22195 states. [2020-10-14 08:52:29,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22195 to 22193. [2020-10-14 08:52:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22193 states. [2020-10-14 08:52:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22193 states to 22193 states and 33712 transitions. [2020-10-14 08:52:29,052 INFO L78 Accepts]: Start accepts. Automaton has 22193 states and 33712 transitions. Word has length 82 [2020-10-14 08:52:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:29,053 INFO L479 AbstractCegarLoop]: Abstraction has 22193 states and 33712 transitions. [2020-10-14 08:52:29,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:52:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 22193 states and 33712 transitions. [2020-10-14 08:52:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:52:29,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:29,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:52:29,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:52:29,054 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:29,055 INFO L82 PathProgramCache]: Analyzing trace with hash 253141301, now seen corresponding path program 1 times [2020-10-14 08:52:29,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:29,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378161068] [2020-10-14 08:52:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:29,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:29,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:29,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:29,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:52:29,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 08:52:29,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-14 08:52:29,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:29,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:29,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:52:29,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:52:29,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 08:52:29,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:29,737 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:52:29,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:29,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:29,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:29,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:29,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:29,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:29,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:52:29,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:29,780 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 08:52:29,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378161068] [2020-10-14 08:52:29,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:29,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:52:29,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872998463] [2020-10-14 08:52:29,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:52:29,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:29,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:52:29,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:52:29,783 INFO L87 Difference]: Start difference. First operand 22193 states and 33712 transitions. Second operand 6 states. [2020-10-14 08:52:29,983 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-14 08:52:31,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:31,923 INFO L93 Difference]: Finished difference Result 66229 states and 100530 transitions. [2020-10-14 08:52:31,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:52:31,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:52:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:32,019 INFO L225 Difference]: With dead ends: 66229 [2020-10-14 08:52:32,019 INFO L226 Difference]: Without dead ends: 44083 [2020-10-14 08:52:32,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:52:32,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44083 states. [2020-10-14 08:52:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44083 to 44081. [2020-10-14 08:52:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44081 states. [2020-10-14 08:52:34,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44081 states to 44081 states and 66608 transitions. [2020-10-14 08:52:34,804 INFO L78 Accepts]: Start accepts. Automaton has 44081 states and 66608 transitions. Word has length 82 [2020-10-14 08:52:34,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:34,804 INFO L479 AbstractCegarLoop]: Abstraction has 44081 states and 66608 transitions. [2020-10-14 08:52:34,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:52:34,804 INFO L276 IsEmpty]: Start isEmpty. Operand 44081 states and 66608 transitions. [2020-10-14 08:52:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:52:34,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:34,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:52:34,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:52:34,805 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:34,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1580526490, now seen corresponding path program 1 times [2020-10-14 08:52:34,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:34,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370974099] [2020-10-14 08:52:34,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:34,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:35,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:35,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:52:35,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:35,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-14 08:52:35,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:35,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:35,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 08:52:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:52:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 08:52:35,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:35,245 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:52:35,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:35,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:35,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:35,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:35,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:35,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:52:35,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:35,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:35,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:35,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:35,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:35,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:35,276 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 08:52:35,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370974099] [2020-10-14 08:52:35,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:35,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 08:52:35,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457076380] [2020-10-14 08:52:35,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 08:52:35,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:35,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 08:52:35,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:52:35,279 INFO L87 Difference]: Start difference. First operand 44081 states and 66608 transitions. Second operand 9 states. [2020-10-14 08:52:35,505 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 08:52:59,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:59,546 INFO L93 Difference]: Finished difference Result 572489 states and 865340 transitions. [2020-10-14 08:52:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 08:52:59,547 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2020-10-14 08:52:59,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:53:00,475 INFO L225 Difference]: With dead ends: 572489 [2020-10-14 08:53:00,475 INFO L226 Difference]: Without dead ends: 528455 [2020-10-14 08:53:00,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-14 08:53:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528455 states. [2020-10-14 08:53:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528455 to 88113. [2020-10-14 08:53:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88113 states. [2020-10-14 08:53:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88113 states to 88113 states and 131120 transitions. [2020-10-14 08:53:15,744 INFO L78 Accepts]: Start accepts. Automaton has 88113 states and 131120 transitions. Word has length 82 [2020-10-14 08:53:15,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:53:15,745 INFO L479 AbstractCegarLoop]: Abstraction has 88113 states and 131120 transitions. [2020-10-14 08:53:15,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 08:53:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 88113 states and 131120 transitions. [2020-10-14 08:53:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 08:53:15,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:53:15,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:53:15,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:53:15,746 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:53:15,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:53:15,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1889360436, now seen corresponding path program 1 times [2020-10-14 08:53:15,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:53:15,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367660734] [2020-10-14 08:53:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:53:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:15,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:16,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:16,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 08:53:16,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:16,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-14 08:53:16,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:16,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:16,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 08:53:16,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:53:16,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 08:53:16,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:16,293 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:53:16,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:53:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:16,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:16,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:16,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:53:16,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:16,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:53:16,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:16,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:53:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:53:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:53:16,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:16,335 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 08:53:16,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367660734] [2020-10-14 08:53:16,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:53:16,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 08:53:16,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027584360] [2020-10-14 08:53:16,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 08:53:16,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:53:16,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 08:53:16,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:53:16,338 INFO L87 Difference]: Start difference. First operand 88113 states and 131120 transitions. Second operand 9 states. [2020-10-14 08:53:16,624 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 08:53:57,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:53:57,787 INFO L93 Difference]: Finished difference Result 616521 states and 917564 transitions. [2020-10-14 08:53:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 08:53:57,788 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-14 08:53:57,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:53:58,564 INFO L225 Difference]: With dead ends: 616521 [2020-10-14 08:53:58,564 INFO L226 Difference]: Without dead ends: 528455 [2020-10-14 08:53:58,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-14 08:53:59,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528455 states. [2020-10-14 08:54:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528455 to 88113. [2020-10-14 08:54:10,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88113 states. [2020-10-14 08:54:10,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88113 states to 88113 states and 130096 transitions. [2020-10-14 08:54:10,147 INFO L78 Accepts]: Start accepts. Automaton has 88113 states and 130096 transitions. Word has length 84 [2020-10-14 08:54:10,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:10,147 INFO L479 AbstractCegarLoop]: Abstraction has 88113 states and 130096 transitions. [2020-10-14 08:54:10,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 08:54:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 88113 states and 130096 transitions. [2020-10-14 08:54:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 08:54:10,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:10,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:10,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:54:10,148 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:10,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:10,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1869311093, now seen corresponding path program 1 times [2020-10-14 08:54:10,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:10,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907216236] [2020-10-14 08:54:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:10,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:10,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:10,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:10,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:10,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 08:54:10,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 08:54:10,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-14 08:54:10,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:10,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:10,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:54:10,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:54:10,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 08:54:10,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:10,515 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:54:10,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:10,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:10,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:10,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:10,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:10,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:54:10,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:10,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:10,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:54:10,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:10,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:54:10,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:10,538 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 08:54:10,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907216236] [2020-10-14 08:54:10,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:10,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:54:10,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043429282] [2020-10-14 08:54:10,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:54:10,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:10,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:54:10,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:54:10,540 INFO L87 Difference]: Start difference. First operand 88113 states and 130096 transitions. Second operand 4 states. [2020-10-14 08:54:10,705 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-14 08:54:24,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:24,480 INFO L93 Difference]: Finished difference Result 218679 states and 322612 transitions. [2020-10-14 08:54:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:54:24,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-14 08:54:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:24,643 INFO L225 Difference]: With dead ends: 218679 [2020-10-14 08:54:24,643 INFO L226 Difference]: Without dead ends: 130613 [2020-10-14 08:54:24,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:54:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130613 states. [2020-10-14 08:54:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130613 to 130611. [2020-10-14 08:54:39,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130611 states. [2020-10-14 08:54:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130611 states to 130611 states and 191026 transitions. [2020-10-14 08:54:40,102 INFO L78 Accepts]: Start accepts. Automaton has 130611 states and 191026 transitions. Word has length 84 [2020-10-14 08:54:40,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:40,102 INFO L479 AbstractCegarLoop]: Abstraction has 130611 states and 191026 transitions. [2020-10-14 08:54:40,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:54:40,103 INFO L276 IsEmpty]: Start isEmpty. Operand 130611 states and 191026 transitions. [2020-10-14 08:54:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 08:54:40,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:40,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:40,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:54:40,103 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:40,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1561277937, now seen corresponding path program 1 times [2020-10-14 08:54:40,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:40,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758340224] [2020-10-14 08:54:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:40,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:40,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:40,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 08:54:40,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:40,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-14 08:54:40,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:40,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:40,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:54:40,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-14 08:54:40,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 08:54:40,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:40,434 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:54:40,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:40,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:40,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:40,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:40,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:40,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:54:40,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:40,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:40,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:54:40,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:40,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:54:40,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:40,460 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 08:54:40,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758340224] [2020-10-14 08:54:40,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:40,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:54:40,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709718548] [2020-10-14 08:54:40,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:54:40,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:54:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:54:40,463 INFO L87 Difference]: Start difference. First operand 130611 states and 191026 transitions. Second operand 5 states.