/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_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:24:51,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:24:51,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:24:51,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:24:51,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:24:51,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:24:51,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:24:51,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:24:51,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:24:51,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:24:51,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:24:51,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:24:51,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:24:51,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:24:51,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:24:51,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:24:51,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:24:51,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:24:51,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:24:51,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:24:51,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:24:51,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:24:51,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:24:51,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:24:51,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:24:51,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:24:51,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:24:51,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:24:51,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:24:51,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:24:51,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:24:51,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:24:51,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:24:51,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:24:51,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:24:51,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:24:51,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:24:51,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:24:51,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:24:51,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:24:51,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:24:51,667 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 09:24:51,713 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:24:51,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:24:51,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:24:51,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:24:51,716 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:24:51,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:24:51,717 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:24:51,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:24:51,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:24:51,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:24:51,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:24:51,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:24:51,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:24:51,720 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:24:51,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:24:51,720 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:24:51,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:24:51,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:24:51,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:24:51,721 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:24:51,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:24:51,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:24:51,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:24:51,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:24:51,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:24:51,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:24:51,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:24:51,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:24:51,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:24:51,723 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 09:24:52,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:24:52,061 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:24:52,065 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:24:52,067 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:24:52,067 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:24:52,068 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:24:52,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd1fc4e5a/52deebfdd2164d43b412470c174a085c/FLAGd9715b523 [2020-10-14 09:24:52,608 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:24:52,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:24:52,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd1fc4e5a/52deebfdd2164d43b412470c174a085c/FLAGd9715b523 [2020-10-14 09:24:52,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd1fc4e5a/52deebfdd2164d43b412470c174a085c [2020-10-14 09:24:52,926 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:24:52,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:24:52,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:24:52,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:24:52,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:24:52,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:24:52" (1/1) ... [2020-10-14 09:24:52,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428b206b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:52, skipping insertion in model container [2020-10-14 09:24:52,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:24:52" (1/1) ... [2020-10-14 09:24:52,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:24:52,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:24:53,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:24:53,521 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:24:53,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:24:53,629 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:24:53,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:53 WrapperNode [2020-10-14 09:24:53,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:24:53,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:24:53,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:24:53,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:24:53,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:53" (1/1) ... [2020-10-14 09:24:53,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:53" (1/1) ... [2020-10-14 09:24:53,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:53" (1/1) ... [2020-10-14 09:24:53,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:53" (1/1) ... [2020-10-14 09:24:53,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:53" (1/1) ... [2020-10-14 09:24:53,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:53" (1/1) ... [2020-10-14 09:24:53,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:53" (1/1) ... [2020-10-14 09:24:53,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:24:53,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:24:53,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:24:53,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:24:53,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:53" (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 09:24:53,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:24:53,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:24:53,778 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:24:53,778 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:24:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:24:53,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:24:53,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 09:24:53,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:24:53,779 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:24:53,779 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:24:53,780 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:24:53,780 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:24:53,780 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:24:53,780 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:24:53,780 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:24:53,780 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:24:53,780 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:24:53,781 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:24:53,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:24:53,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:24:53,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:24:54,588 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:24:54,588 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:24:54,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:24:54 BoogieIcfgContainer [2020-10-14 09:24:54,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:24:54,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:24:54,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:24:54,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:24:54,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:24:52" (1/3) ... [2020-10-14 09:24:54,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7127e81e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:24:54, skipping insertion in model container [2020-10-14 09:24:54,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:24:53" (2/3) ... [2020-10-14 09:24:54,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7127e81e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:24:54, skipping insertion in model container [2020-10-14 09:24:54,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:24:54" (3/3) ... [2020-10-14 09:24:54,604 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:24:54,616 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:24:54,626 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:24:54,642 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:24:54,672 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:24:54,672 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:24:54,672 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:24:54,673 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:24:54,673 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:24:54,673 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:24:54,673 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:24:54,673 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:24:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-10-14 09:24:54,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 09:24:54,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:54,713 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] [2020-10-14 09:24:54,713 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:54,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1725986399, now seen corresponding path program 1 times [2020-10-14 09:24:54,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:54,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953624738] [2020-10-14 09:24:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:55,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:55,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:55,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:55,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:57,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:57,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 09:24:57,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:24:57,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2214 [2020-10-14 09:24:57,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:57,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:57,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:57,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 09:24:57,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:24:57,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 09:24:57,689 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:24:57,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:57,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:57,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:57,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:57,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:57,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 09:24:57,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:57,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:57,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:57,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:57,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:57,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:24:57,736 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 09:24:57,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953624738] [2020-10-14 09:24:57,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:57,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:57,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671832999] [2020-10-14 09:24:57,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:57,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:57,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:57,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:57,763 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 4 states. [2020-10-14 09:24:58,038 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:24:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:58,887 INFO L93 Difference]: Finished difference Result 350 states and 582 transitions. [2020-10-14 09:24:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:24:58,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-14 09:24:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:58,904 INFO L225 Difference]: With dead ends: 350 [2020-10-14 09:24:58,905 INFO L226 Difference]: Without dead ends: 243 [2020-10-14 09:24:58,909 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 09:24:58,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-14 09:24:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 240. [2020-10-14 09:24:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-14 09:24:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 377 transitions. [2020-10-14 09:24:58,998 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 377 transitions. Word has length 66 [2020-10-14 09:24:58,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:58,999 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 377 transitions. [2020-10-14 09:24:58,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:58,999 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 377 transitions. [2020-10-14 09:24:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:24:59,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:59,004 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] [2020-10-14 09:24:59,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:24:59,007 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:59,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:59,007 INFO L82 PathProgramCache]: Analyzing trace with hash 27567360, now seen corresponding path program 1 times [2020-10-14 09:24:59,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:59,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399702746] [2020-10-14 09:24:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:59,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:59,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:59,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:59,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:59,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:03,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:03,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:25:03,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:25:03,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4174 [2020-10-14 09:25:03,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:03,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:03,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:03,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 09:25:03,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:25:03,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:25:03,488 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:03,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:03,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:03,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:03,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:03,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:03,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:25:03,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:03,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:03,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:03,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:03,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:03,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:03,539 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 09:25:03,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399702746] [2020-10-14 09:25:03,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:03,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:03,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157080351] [2020-10-14 09:25:03,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:03,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:03,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:03,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:03,545 INFO L87 Difference]: Start difference. First operand 240 states and 377 transitions. Second operand 4 states. [2020-10-14 09:25:03,749 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:25:04,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:04,387 INFO L93 Difference]: Finished difference Result 582 states and 945 transitions. [2020-10-14 09:25:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:04,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-14 09:25:04,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:04,392 INFO L225 Difference]: With dead ends: 582 [2020-10-14 09:25:04,392 INFO L226 Difference]: Without dead ends: 403 [2020-10-14 09:25:04,394 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 09:25:04,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-14 09:25:04,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 399. [2020-10-14 09:25:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-14 09:25:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 640 transitions. [2020-10-14 09:25:04,428 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 640 transitions. Word has length 68 [2020-10-14 09:25:04,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:04,428 INFO L479 AbstractCegarLoop]: Abstraction has 399 states and 640 transitions. [2020-10-14 09:25:04,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:04,428 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 640 transitions. [2020-10-14 09:25:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 09:25:04,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:04,431 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] [2020-10-14 09:25:04,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:25:04,432 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:04,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:04,432 INFO L82 PathProgramCache]: Analyzing trace with hash -114533023, now seen corresponding path program 1 times [2020-10-14 09:25:04,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:04,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289901460] [2020-10-14 09:25:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:04,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:04,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:04,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:04,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:05,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:06,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:09,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:09,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 09:25:09,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:25:09,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:25:09,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:09,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:09,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:09,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 09:25:09,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:25:09,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:09,775 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:09,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:09,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:09,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:09,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:09,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:09,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:25:09,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:09,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:09,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:09,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:09,820 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 09:25:09,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289901460] [2020-10-14 09:25:09,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:09,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:09,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029110141] [2020-10-14 09:25:09,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:09,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:09,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:09,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:09,826 INFO L87 Difference]: Start difference. First operand 399 states and 640 transitions. Second operand 4 states. [2020-10-14 09:25:10,120 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:25:10,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:10,795 INFO L93 Difference]: Finished difference Result 1035 states and 1690 transitions. [2020-10-14 09:25:10,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:10,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 09:25:10,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:10,802 INFO L225 Difference]: With dead ends: 1035 [2020-10-14 09:25:10,802 INFO L226 Difference]: Without dead ends: 697 [2020-10-14 09:25:10,806 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 09:25:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-10-14 09:25:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 691. [2020-10-14 09:25:10,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-10-14 09:25:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1100 transitions. [2020-10-14 09:25:10,861 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1100 transitions. Word has length 70 [2020-10-14 09:25:10,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:10,862 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 1100 transitions. [2020-10-14 09:25:10,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1100 transitions. [2020-10-14 09:25:10,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 09:25:10,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:10,876 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] [2020-10-14 09:25:10,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:25:10,876 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:10,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:10,877 INFO L82 PathProgramCache]: Analyzing trace with hash -851986110, now seen corresponding path program 1 times [2020-10-14 09:25:10,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:10,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184911168] [2020-10-14 09:25:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:10,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:10,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:11,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:11,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:11,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:13,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:14,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:15,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:15,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 09:25:15,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:25:15,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:25:15,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:15,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:25:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:25:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 09:25:15,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:16,222 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:16,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:16,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:16,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:16,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:16,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:16,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 09:25:16,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:16,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:16,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:16,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:16,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:16,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:16,286 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 09:25:16,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184911168] [2020-10-14 09:25:16,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:16,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:25:16,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616086537] [2020-10-14 09:25:16,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:25:16,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:16,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:25:16,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:16,289 INFO L87 Difference]: Start difference. First operand 691 states and 1100 transitions. Second operand 5 states. [2020-10-14 09:25:17,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:17,461 INFO L93 Difference]: Finished difference Result 1958 states and 3135 transitions. [2020-10-14 09:25:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:17,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-14 09:25:17,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:17,469 INFO L225 Difference]: With dead ends: 1958 [2020-10-14 09:25:17,469 INFO L226 Difference]: Without dead ends: 1328 [2020-10-14 09:25:17,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:25:17,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2020-10-14 09:25:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1326. [2020-10-14 09:25:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1326 states. [2020-10-14 09:25:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 2101 transitions. [2020-10-14 09:25:17,558 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 2101 transitions. Word has length 72 [2020-10-14 09:25:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:17,558 INFO L479 AbstractCegarLoop]: Abstraction has 1326 states and 2101 transitions. [2020-10-14 09:25:17,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:25:17,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 2101 transitions. [2020-10-14 09:25:17,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:25:17,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:17,561 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] [2020-10-14 09:25:17,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:25:17,561 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:17,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:17,562 INFO L82 PathProgramCache]: Analyzing trace with hash -161796966, now seen corresponding path program 1 times [2020-10-14 09:25:17,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:17,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615165531] [2020-10-14 09:25:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:17,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:17,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:17,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:17,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:17,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:18,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:21,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:22,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:22,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:25:22,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:25:22,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 09:25:22,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:22,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:22,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:22,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 09:25:22,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 09:25:22,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:22,888 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:22,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:22,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:22,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:22,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:22,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:22,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:25:22,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:22,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:22,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:22,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:22,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:22,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:22,942 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 09:25:22,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615165531] [2020-10-14 09:25:22,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:22,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:22,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748181732] [2020-10-14 09:25:22,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:22,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:22,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:22,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:22,946 INFO L87 Difference]: Start difference. First operand 1326 states and 2101 transitions. Second operand 4 states. [2020-10-14 09:25:23,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:23,810 INFO L93 Difference]: Finished difference Result 3112 states and 4993 transitions. [2020-10-14 09:25:23,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:25:23,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:25:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:23,824 INFO L225 Difference]: With dead ends: 3112 [2020-10-14 09:25:23,824 INFO L226 Difference]: Without dead ends: 1898 [2020-10-14 09:25:23,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-10-14 09:25:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1840. [2020-10-14 09:25:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1840 states. [2020-10-14 09:25:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 2915 transitions. [2020-10-14 09:25:23,969 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 2915 transitions. Word has length 73 [2020-10-14 09:25:23,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:23,971 INFO L479 AbstractCegarLoop]: Abstraction has 1840 states and 2915 transitions. [2020-10-14 09:25:23,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:23,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 2915 transitions. [2020-10-14 09:25:23,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:25:23,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:23,974 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] [2020-10-14 09:25:23,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:25:23,974 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:23,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1760328783, now seen corresponding path program 1 times [2020-10-14 09:25:23,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:23,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080911790] [2020-10-14 09:25:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:24,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:24,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:24,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:24,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:24,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:24,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:24,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:26,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:29,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:29,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:25:29,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:25:29,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:25:29,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:29,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:29,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:29,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:25:29,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:25:29,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:29,230 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:29,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:29,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:29,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:29,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:29,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:29,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:25:29,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:29,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:29,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:29,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:29,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:29,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:29,261 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 09:25:29,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080911790] [2020-10-14 09:25:29,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:29,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:29,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017589468] [2020-10-14 09:25:29,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:29,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:29,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:29,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:29,265 INFO L87 Difference]: Start difference. First operand 1840 states and 2915 transitions. Second operand 4 states. [2020-10-14 09:25:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:30,271 INFO L93 Difference]: Finished difference Result 5430 states and 8595 transitions. [2020-10-14 09:25:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:25:30,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:25:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:30,295 INFO L225 Difference]: With dead ends: 5430 [2020-10-14 09:25:30,296 INFO L226 Difference]: Without dead ends: 3638 [2020-10-14 09:25:30,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:30,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2020-10-14 09:25:30,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 1846. [2020-10-14 09:25:30,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1846 states. [2020-10-14 09:25:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2923 transitions. [2020-10-14 09:25:30,470 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2923 transitions. Word has length 73 [2020-10-14 09:25:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:30,470 INFO L479 AbstractCegarLoop]: Abstraction has 1846 states and 2923 transitions. [2020-10-14 09:25:30,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2923 transitions. [2020-10-14 09:25:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 09:25:30,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:30,473 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] [2020-10-14 09:25:30,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:25:30,474 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:30,474 INFO L82 PathProgramCache]: Analyzing trace with hash -170908733, now seen corresponding path program 1 times [2020-10-14 09:25:30,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:30,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446761212] [2020-10-14 09:25:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:30,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:30,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:30,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:30,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:30,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:31,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:31,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:35,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:35,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 09:25:35,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:25:35,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:25:35,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:35,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:35,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:25:35,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:25:35,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 09:25:35,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:35,779 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:35,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:35,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:35,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:35,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:35,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:35,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:25:35,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:35,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:35,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:35,818 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 09:25:35,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446761212] [2020-10-14 09:25:35,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:35,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:25:35,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986971560] [2020-10-14 09:25:35,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:25:35,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:35,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:25:35,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:35,821 INFO L87 Difference]: Start difference. First operand 1846 states and 2923 transitions. Second operand 5 states. [2020-10-14 09:25:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:37,089 INFO L93 Difference]: Finished difference Result 5273 states and 8379 transitions. [2020-10-14 09:25:37,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:37,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-14 09:25:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:37,108 INFO L225 Difference]: With dead ends: 5273 [2020-10-14 09:25:37,108 INFO L226 Difference]: Without dead ends: 3545 [2020-10-14 09:25:37,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:25:37,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3545 states. [2020-10-14 09:25:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3545 to 3543. [2020-10-14 09:25:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3543 states. [2020-10-14 09:25:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 5575 transitions. [2020-10-14 09:25:37,434 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 5575 transitions. Word has length 74 [2020-10-14 09:25:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:37,435 INFO L479 AbstractCegarLoop]: Abstraction has 3543 states and 5575 transitions. [2020-10-14 09:25:37,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:25:37,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 5575 transitions. [2020-10-14 09:25:37,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:25:37,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:37,439 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] [2020-10-14 09:25:37,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:25:37,439 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:37,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1977767504, now seen corresponding path program 1 times [2020-10-14 09:25:37,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:37,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686553088] [2020-10-14 09:25:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:37,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:37,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:37,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:37,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:37,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:38,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:39,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:41,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:42,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:42,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:25:42,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:25:42,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:25:42,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:42,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:42,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:42,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:25:42,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:25:42,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:42,654 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:42,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:42,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:42,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:42,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:42,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:42,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:25:42,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:42,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:42,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:42,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:42,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:42,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:42,688 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 09:25:42,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686553088] [2020-10-14 09:25:42,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:42,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:42,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204694892] [2020-10-14 09:25:42,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:42,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:42,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:42,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:42,690 INFO L87 Difference]: Start difference. First operand 3543 states and 5575 transitions. Second operand 4 states. [2020-10-14 09:25:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:43,735 INFO L93 Difference]: Finished difference Result 10547 states and 16589 transitions. [2020-10-14 09:25:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:25:43,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:25:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:43,770 INFO L225 Difference]: With dead ends: 10547 [2020-10-14 09:25:43,771 INFO L226 Difference]: Without dead ends: 7051 [2020-10-14 09:25:43,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2020-10-14 09:25:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 3555. [2020-10-14 09:25:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3555 states. [2020-10-14 09:25:44,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 5591 transitions. [2020-10-14 09:25:44,150 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 5591 transitions. Word has length 75 [2020-10-14 09:25:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:44,151 INFO L479 AbstractCegarLoop]: Abstraction has 3555 states and 5591 transitions. [2020-10-14 09:25:44,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 5591 transitions. [2020-10-14 09:25:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:25:44,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:44,154 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] [2020-10-14 09:25:44,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:25:44,154 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:44,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1894787855, now seen corresponding path program 1 times [2020-10-14 09:25:44,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:44,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718733952] [2020-10-14 09:25:44,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:44,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:44,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:44,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:44,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:44,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:45,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:47,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:49,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:49,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:25:49,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:25:49,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 09:25:49,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:49,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:49,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:49,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 09:25:49,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 09:25:49,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:49,385 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:49,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:49,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:49,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:49,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:49,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:49,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:25:49,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:49,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:49,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:49,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:49,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:49,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:49,413 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 09:25:49,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718733952] [2020-10-14 09:25:49,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:49,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:49,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988953015] [2020-10-14 09:25:49,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:49,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:49,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:49,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:49,415 INFO L87 Difference]: Start difference. First operand 3555 states and 5591 transitions. Second operand 4 states. [2020-10-14 09:25:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:50,339 INFO L93 Difference]: Finished difference Result 8431 states and 13393 transitions. [2020-10-14 09:25:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:25:50,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:25:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:50,366 INFO L225 Difference]: With dead ends: 8431 [2020-10-14 09:25:50,366 INFO L226 Difference]: Without dead ends: 5105 [2020-10-14 09:25:50,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5105 states. [2020-10-14 09:25:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5105 to 4947. [2020-10-14 09:25:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4947 states. [2020-10-14 09:25:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4947 states to 4947 states and 7767 transitions. [2020-10-14 09:25:50,820 INFO L78 Accepts]: Start accepts. Automaton has 4947 states and 7767 transitions. Word has length 75 [2020-10-14 09:25:50,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:50,821 INFO L479 AbstractCegarLoop]: Abstraction has 4947 states and 7767 transitions. [2020-10-14 09:25:50,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:50,821 INFO L276 IsEmpty]: Start isEmpty. Operand 4947 states and 7767 transitions. [2020-10-14 09:25:50,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:25:50,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:50,824 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 09:25:50,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:25:50,824 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:50,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:50,825 INFO L82 PathProgramCache]: Analyzing trace with hash -799578856, now seen corresponding path program 1 times [2020-10-14 09:25:50,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:50,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982565559] [2020-10-14 09:25:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:50,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:51,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:51,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:51,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:53,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:55,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:55,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:25:55,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:25:55,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 09:25:55,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:55,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:55,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:55,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:25:55,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 09:25:55,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:56,047 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:25:56,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:56,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:56,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:56,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:56,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:56,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:25:56,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:56,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:56,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:56,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:56,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:56,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:56,071 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 09:25:56,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982565559] [2020-10-14 09:25:56,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:56,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:56,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231469605] [2020-10-14 09:25:56,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:56,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:56,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:56,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:56,074 INFO L87 Difference]: Start difference. First operand 4947 states and 7767 transitions. Second operand 4 states. [2020-10-14 09:25:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:57,653 INFO L93 Difference]: Finished difference Result 14169 states and 22293 transitions. [2020-10-14 09:25:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:25:57,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-14 09:25:57,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:57,677 INFO L225 Difference]: With dead ends: 14169 [2020-10-14 09:25:57,677 INFO L226 Difference]: Without dead ends: 9451 [2020-10-14 09:25:57,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:57,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9451 states. [2020-10-14 09:25:58,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9451 to 9449. [2020-10-14 09:25:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9449 states. [2020-10-14 09:25:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9449 states to 9449 states and 14719 transitions. [2020-10-14 09:25:58,263 INFO L78 Accepts]: Start accepts. Automaton has 9449 states and 14719 transitions. Word has length 76 [2020-10-14 09:25:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:58,263 INFO L479 AbstractCegarLoop]: Abstraction has 9449 states and 14719 transitions. [2020-10-14 09:25:58,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand 9449 states and 14719 transitions. [2020-10-14 09:25:58,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:25:58,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:58,268 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 09:25:58,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:25:58,269 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:58,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1928154123, now seen corresponding path program 1 times [2020-10-14 09:25:58,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:58,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905888604] [2020-10-14 09:25:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:58,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:58,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:58,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:58,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:58,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:58,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:59,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:00,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:00,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:03,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:03,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:26:03,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:26:03,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:26:03,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:03,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:03,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:26:03,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:26:03,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 09:26:03,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:03,518 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:03,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:03,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:03,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:03,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:03,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:03,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:26:03,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:03,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:03,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:03,548 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 09:26:03,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905888604] [2020-10-14 09:26:03,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:03,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:26:03,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87189283] [2020-10-14 09:26:03,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:26:03,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:03,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:26:03,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:03,550 INFO L87 Difference]: Start difference. First operand 9449 states and 14719 transitions. Second operand 5 states. [2020-10-14 09:26:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:05,369 INFO L93 Difference]: Finished difference Result 25987 states and 40585 transitions. [2020-10-14 09:26:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:05,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 09:26:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:05,417 INFO L225 Difference]: With dead ends: 25987 [2020-10-14 09:26:05,417 INFO L226 Difference]: Without dead ends: 16793 [2020-10-14 09:26:05,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:26:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16793 states. [2020-10-14 09:26:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16793 to 16791. [2020-10-14 09:26:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16791 states. [2020-10-14 09:26:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16791 states to 16791 states and 25975 transitions. [2020-10-14 09:26:06,549 INFO L78 Accepts]: Start accepts. Automaton has 16791 states and 25975 transitions. Word has length 76 [2020-10-14 09:26:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:06,549 INFO L479 AbstractCegarLoop]: Abstraction has 16791 states and 25975 transitions. [2020-10-14 09:26:06,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:26:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 16791 states and 25975 transitions. [2020-10-14 09:26:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:26:06,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:06,556 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 09:26:06,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:26:06,557 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:06,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:06,557 INFO L82 PathProgramCache]: Analyzing trace with hash 611262788, now seen corresponding path program 1 times [2020-10-14 09:26:06,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:06,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690577769] [2020-10-14 09:26:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:06,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:06,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:06,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:06,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:06,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:06,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:06,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:11,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:11,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:26:11,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:11,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:26:11,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:11,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:11,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:26:11,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:26:11,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 09:26:11,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:11,820 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:11,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:11,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:11,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:11,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:11,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:11,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:26:11,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:11,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:11,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:11,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:11,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:11,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:11,847 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 09:26:11,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690577769] [2020-10-14 09:26:11,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:11,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:26:11,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702157906] [2020-10-14 09:26:11,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:26:11,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:11,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:26:11,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:11,849 INFO L87 Difference]: Start difference. First operand 16791 states and 25975 transitions. Second operand 5 states. [2020-10-14 09:26:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:14,046 INFO L93 Difference]: Finished difference Result 35003 states and 54231 transitions. [2020-10-14 09:26:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:14,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 09:26:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:14,090 INFO L225 Difference]: With dead ends: 35003 [2020-10-14 09:26:14,090 INFO L226 Difference]: Without dead ends: 18611 [2020-10-14 09:26:14,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:26:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18611 states. [2020-10-14 09:26:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18611 to 16962. [2020-10-14 09:26:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16962 states. [2020-10-14 09:26:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16962 states to 16962 states and 26172 transitions. [2020-10-14 09:26:15,354 INFO L78 Accepts]: Start accepts. Automaton has 16962 states and 26172 transitions. Word has length 76 [2020-10-14 09:26:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:15,354 INFO L479 AbstractCegarLoop]: Abstraction has 16962 states and 26172 transitions. [2020-10-14 09:26:15,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:26:15,355 INFO L276 IsEmpty]: Start isEmpty. Operand 16962 states and 26172 transitions. [2020-10-14 09:26:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:26:15,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:15,362 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 09:26:15,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:26:15,362 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:15,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1719545426, now seen corresponding path program 1 times [2020-10-14 09:26:15,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:15,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612247281] [2020-10-14 09:26:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:15,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:15,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:15,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:15,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:15,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:15,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:20,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:20,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:26:20,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:26:20,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:26:20,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:20,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:20,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:20,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 09:26:20,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 09:26:20,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:20,588 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:20,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:20,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:20,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:20,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:20,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:20,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:26:20,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:20,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:20,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:20,613 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 09:26:20,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612247281] [2020-10-14 09:26:20,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:20,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:20,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569315525] [2020-10-14 09:26:20,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:20,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:20,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:20,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:20,615 INFO L87 Difference]: Start difference. First operand 16962 states and 26172 transitions. Second operand 4 states. [2020-10-14 09:26:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:22,969 INFO L93 Difference]: Finished difference Result 40804 states and 63824 transitions. [2020-10-14 09:26:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:22,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:26:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:23,017 INFO L225 Difference]: With dead ends: 40804 [2020-10-14 09:26:23,017 INFO L226 Difference]: Without dead ends: 24582 [2020-10-14 09:26:23,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:23,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24582 states. [2020-10-14 09:26:24,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24582 to 23716. [2020-10-14 09:26:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23716 states. [2020-10-14 09:26:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23716 states to 23716 states and 36738 transitions. [2020-10-14 09:26:24,932 INFO L78 Accepts]: Start accepts. Automaton has 23716 states and 36738 transitions. Word has length 77 [2020-10-14 09:26:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:24,933 INFO L479 AbstractCegarLoop]: Abstraction has 23716 states and 36738 transitions. [2020-10-14 09:26:24,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 23716 states and 36738 transitions. [2020-10-14 09:26:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:26:24,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:24,939 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 09:26:24,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:26:24,939 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:24,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:24,939 INFO L82 PathProgramCache]: Analyzing trace with hash 170775727, now seen corresponding path program 1 times [2020-10-14 09:26:24,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:24,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007732219] [2020-10-14 09:26:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:24,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:24,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:25,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:25,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:25,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:25,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:28,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:29,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:29,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:26:29,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:29,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:26:29,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:29,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:29,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:29,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:26:29,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:26:29,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:30,125 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:30,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:30,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:30,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:30,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:30,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:30,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:26:30,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:30,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:30,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:30,147 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 09:26:30,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007732219] [2020-10-14 09:26:30,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:30,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:30,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432226528] [2020-10-14 09:26:30,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:30,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:30,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:30,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:30,150 INFO L87 Difference]: Start difference. First operand 23716 states and 36738 transitions. Second operand 4 states. [2020-10-14 09:26:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:34,419 INFO L93 Difference]: Finished difference Result 70861 states and 109839 transitions. [2020-10-14 09:26:34,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:34,419 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:26:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:34,492 INFO L225 Difference]: With dead ends: 70861 [2020-10-14 09:26:34,492 INFO L226 Difference]: Without dead ends: 47396 [2020-10-14 09:26:34,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47396 states. [2020-10-14 09:26:36,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47396 to 23719. [2020-10-14 09:26:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23719 states. [2020-10-14 09:26:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23719 states to 23719 states and 36742 transitions. [2020-10-14 09:26:36,404 INFO L78 Accepts]: Start accepts. Automaton has 23719 states and 36742 transitions. Word has length 77 [2020-10-14 09:26:36,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:36,404 INFO L479 AbstractCegarLoop]: Abstraction has 23719 states and 36742 transitions. [2020-10-14 09:26:36,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:36,404 INFO L276 IsEmpty]: Start isEmpty. Operand 23719 states and 36742 transitions. [2020-10-14 09:26:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 09:26:36,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:36,409 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 09:26:36,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:26:36,409 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:36,410 INFO L82 PathProgramCache]: Analyzing trace with hash 323191237, now seen corresponding path program 1 times [2020-10-14 09:26:36,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:36,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98753300] [2020-10-14 09:26:36,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:36,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:36,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:36,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:36,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:36,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:36,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:36,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:41,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:41,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 09:26:41,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:41,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:26:41,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:41,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:41,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:26:41,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:26:41,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 09:26:41,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:41,647 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:41,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:41,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:41,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:41,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:41,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:41,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:26:41,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:41,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:41,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:41,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:41,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:41,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:41,669 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 09:26:41,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98753300] [2020-10-14 09:26:41,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:41,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:26:41,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460823501] [2020-10-14 09:26:41,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:26:41,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:41,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:26:41,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:26:41,670 INFO L87 Difference]: Start difference. First operand 23719 states and 36742 transitions. Second operand 6 states. [2020-10-14 09:26:41,898 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:26:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:49,838 INFO L93 Difference]: Finished difference Result 122271 states and 192786 transitions. [2020-10-14 09:26:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:26:49,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-14 09:26:49,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:50,022 INFO L225 Difference]: With dead ends: 122271 [2020-10-14 09:26:50,022 INFO L226 Difference]: Without dead ends: 99295 [2020-10-14 09:26:50,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:26:50,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99295 states. [2020-10-14 09:26:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99295 to 45365. [2020-10-14 09:26:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45365 states. [2020-10-14 09:26:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45365 states to 45365 states and 70148 transitions. [2020-10-14 09:26:54,236 INFO L78 Accepts]: Start accepts. Automaton has 45365 states and 70148 transitions. Word has length 78 [2020-10-14 09:26:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:54,236 INFO L479 AbstractCegarLoop]: Abstraction has 45365 states and 70148 transitions. [2020-10-14 09:26:54,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:26:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 45365 states and 70148 transitions. [2020-10-14 09:26:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 09:26:54,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:54,243 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 09:26:54,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:26:54,243 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:54,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1367383318, now seen corresponding path program 1 times [2020-10-14 09:26:54,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:54,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655415883] [2020-10-14 09:26:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:54,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:54,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:54,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:54,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:54,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:54,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:54,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:59,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:59,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 09:26:59,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:59,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:26:59,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:59,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:26:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:26:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:26:59,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:59,463 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:26:59,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:59,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:59,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:59,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:59,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:59,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:26:59,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:59,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:59,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:59,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:59,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:59,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:59,496 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 09:26:59,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655415883] [2020-10-14 09:26:59,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:59,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:26:59,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438710013] [2020-10-14 09:26:59,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:26:59,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:59,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:26:59,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:59,498 INFO L87 Difference]: Start difference. First operand 45365 states and 70148 transitions. Second operand 5 states. [2020-10-14 09:26:59,713 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:27:09,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:09,234 INFO L93 Difference]: Finished difference Result 148599 states and 232595 transitions. [2020-10-14 09:27:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:27:09,405 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-14 09:27:09,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:09,577 INFO L225 Difference]: With dead ends: 148599 [2020-10-14 09:27:09,578 INFO L226 Difference]: Without dead ends: 103977 [2020-10-14 09:27:09,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:27:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103977 states. [2020-10-14 09:27:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103977 to 74421. [2020-10-14 09:27:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74421 states. [2020-10-14 09:27:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74421 states to 74421 states and 115496 transitions. [2020-10-14 09:27:17,704 INFO L78 Accepts]: Start accepts. Automaton has 74421 states and 115496 transitions. Word has length 79 [2020-10-14 09:27:17,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:17,704 INFO L479 AbstractCegarLoop]: Abstraction has 74421 states and 115496 transitions. [2020-10-14 09:27:17,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:27:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 74421 states and 115496 transitions. [2020-10-14 09:27:17,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:27:17,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:17,713 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 09:27:17,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:27:17,714 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:17,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:17,714 INFO L82 PathProgramCache]: Analyzing trace with hash 655939681, now seen corresponding path program 1 times [2020-10-14 09:27:17,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:17,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111703360] [2020-10-14 09:27:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:17,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:17,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:17,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:17,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:17,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:19,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:22,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:22,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:27:22,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:27:22,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:27:22,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:22,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:22,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:27:22,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 09:27:22,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 09:27:22,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:22,934 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:27:22,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:22,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:22,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:22,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:22,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:22,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:22,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:22,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:22,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:22,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:22,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:22,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:22,958 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 09:27:22,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111703360] [2020-10-14 09:27:22,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:22,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:27:22,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062057819] [2020-10-14 09:27:22,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:27:22,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:22,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:27:22,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:22,960 INFO L87 Difference]: Start difference. First operand 74421 states and 115496 transitions. Second operand 4 states. [2020-10-14 09:27:23,164 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:27:33,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:33,033 INFO L93 Difference]: Finished difference Result 146493 states and 228570 transitions. [2020-10-14 09:27:33,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:27:33,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 09:27:33,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:33,182 INFO L225 Difference]: With dead ends: 146493 [2020-10-14 09:27:33,183 INFO L226 Difference]: Without dead ends: 96999 [2020-10-14 09:27:33,226 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 09:27:33,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96999 states. [2020-10-14 09:27:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96999 to 96997. [2020-10-14 09:27:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96997 states. [2020-10-14 09:27:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96997 states to 96997 states and 150448 transitions. [2020-10-14 09:27:41,394 INFO L78 Accepts]: Start accepts. Automaton has 96997 states and 150448 transitions. Word has length 80 [2020-10-14 09:27:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:41,394 INFO L479 AbstractCegarLoop]: Abstraction has 96997 states and 150448 transitions. [2020-10-14 09:27:41,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:27:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 96997 states and 150448 transitions. [2020-10-14 09:27:41,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:27:41,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:41,399 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 09:27:41,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:27:41,400 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:41,400 INFO L82 PathProgramCache]: Analyzing trace with hash -617842516, now seen corresponding path program 1 times [2020-10-14 09:27:41,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:41,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719944522] [2020-10-14 09:27:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:41,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:41,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:41,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:41,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:41,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:41,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:41,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:46,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:46,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:27:46,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:27:46,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:27:46,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:46,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:27:46,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:27:46,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:27:46,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:46,626 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:27:46,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:46,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:46,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:46,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:46,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:46,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:46,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:46,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:46,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:46,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:46,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:46,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:46,647 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 09:27:46,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719944522] [2020-10-14 09:27:46,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:46,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:27:46,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329016502] [2020-10-14 09:27:46,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:27:46,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:46,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:27:46,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:27:46,649 INFO L87 Difference]: Start difference. First operand 96997 states and 150448 transitions. Second operand 5 states. [2020-10-14 09:27:46,858 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-14 09:28:07,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:28:07,373 INFO L93 Difference]: Finished difference Result 321855 states and 501751 transitions. [2020-10-14 09:28:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:28:07,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-10-14 09:28:07,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:28:07,791 INFO L225 Difference]: With dead ends: 321855 [2020-10-14 09:28:07,791 INFO L226 Difference]: Without dead ends: 226129 [2020-10-14 09:28:07,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:28:08,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226129 states. [2020-10-14 09:28:25,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226129 to 161129. [2020-10-14 09:28:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161129 states. [2020-10-14 09:28:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161129 states to 161129 states and 249178 transitions. [2020-10-14 09:28:25,692 INFO L78 Accepts]: Start accepts. Automaton has 161129 states and 249178 transitions. Word has length 80 [2020-10-14 09:28:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:28:25,692 INFO L479 AbstractCegarLoop]: Abstraction has 161129 states and 249178 transitions. [2020-10-14 09:28:25,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:28:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 161129 states and 249178 transitions. [2020-10-14 09:28:25,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:28:25,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:28:25,697 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 09:28:25,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:28:25,697 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:28:25,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:28:25,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1121986609, now seen corresponding path program 1 times [2020-10-14 09:28:25,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:28:25,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189505596] [2020-10-14 09:28:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:28:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:25,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:25,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:25,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:25,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:25,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:30,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:30,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:28:30,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:28:30,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:28:30,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:30,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:30,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:28:30,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 09:28:30,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 09:28:30,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:30,918 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 09:28:30,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:28:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:30,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:30,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:30,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:28:30,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:28:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:28:30,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:30,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:28:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:28:30,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:28:30,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:30,941 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 09:28:30,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189505596] [2020-10-14 09:28:30,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:28:30,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:28:30,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774223923] [2020-10-14 09:28:30,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:28:30,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:28:30,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:28:30,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:28:30,943 INFO L87 Difference]: Start difference. First operand 161129 states and 249178 transitions. Second operand 4 states. [2020-10-14 09:28:31,148 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 167