/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_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:30:56,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:30:56,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:30:56,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:30:56,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:30:56,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:30:56,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:30:56,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:30:56,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:30:56,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:30:56,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:30:56,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:30:56,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:30:56,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:30:56,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:30:56,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:30:56,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:30:56,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:30:56,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:30:56,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:30:56,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:30:56,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:30:56,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:30:56,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:30:56,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:30:56,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:30:56,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:30:56,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:30:56,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:30:56,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:30:56,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:30:56,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:30:56,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:30:56,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:30:56,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:30:56,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:30:56,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:30:56,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:30:56,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:30:56,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:30:56,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:30:56,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 08:30:56,673 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:30:56,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:30:56,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:30:56,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:30:56,676 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:30:56,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:30:56,677 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:30:56,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:30:56,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:30:56,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:30:56,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:30:56,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:30:56,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:30:56,679 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:30:56,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:30:56,680 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:30:56,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:30:56,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:30:56,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:30:56,681 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:30:56,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:30:56,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:30:56,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:30:56,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:30:56,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:30:56,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:30:56,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:30:56,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:30:56,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:30:56,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 08:30:56,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:30:56,980 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:30:56,986 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:30:56,988 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:30:56,988 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:30:56,989 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:30:57,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77ae750fe/98b17a2b24804f9bbcf017e43c238a32/FLAG42877446e [2020-10-14 08:30:57,604 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:30:57,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:30:57,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77ae750fe/98b17a2b24804f9bbcf017e43c238a32/FLAG42877446e [2020-10-14 08:30:57,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77ae750fe/98b17a2b24804f9bbcf017e43c238a32 [2020-10-14 08:30:57,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:30:57,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:30:57,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:30:57,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:30:57,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:30:57,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:30:57" (1/1) ... [2020-10-14 08:30:57,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@177f3252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:30:57, skipping insertion in model container [2020-10-14 08:30:57,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:30:57" (1/1) ... [2020-10-14 08:30:57,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:30:58,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:30:58,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:30:58,548 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:30:58,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:30:58,736 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:30:58,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:30:58 WrapperNode [2020-10-14 08:30:58,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:30:58,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:30:58,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:30:58,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:30:58,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:30:58" (1/1) ... [2020-10-14 08:30:58,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:30:58" (1/1) ... [2020-10-14 08:30:58,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:30:58" (1/1) ... [2020-10-14 08:30:58,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:30:58" (1/1) ... [2020-10-14 08:30:58,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:30:58" (1/1) ... [2020-10-14 08:30:58,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:30:58" (1/1) ... [2020-10-14 08:30:58,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:30:58" (1/1) ... [2020-10-14 08:30:58,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:30:58,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:30:58,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:30:58,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:30:58,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:30:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:30:58,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:30:58,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:30:58,906 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:30:58,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:30:58,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:30:58,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:30:58,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 08:30:58,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:30:58,907 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:30:58,907 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:30:58,907 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:30:58,908 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:30:58,908 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:30:58,908 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:30:58,908 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:30:58,908 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:30:58,909 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 08:30:58,909 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:30:58,909 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:30:58,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:30:58,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:30:58,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:31:00,328 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:31:00,329 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:31:00,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:31:00 BoogieIcfgContainer [2020-10-14 08:31:00,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:31:00,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:31:00,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:31:00,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:31:00,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:30:57" (1/3) ... [2020-10-14 08:31:00,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b250d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:31:00, skipping insertion in model container [2020-10-14 08:31:00,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:30:58" (2/3) ... [2020-10-14 08:31:00,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b250d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:31:00, skipping insertion in model container [2020-10-14 08:31:00,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:31:00" (3/3) ... [2020-10-14 08:31:00,345 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:31:00,356 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:31:00,364 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:31:00,379 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:31:00,410 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:31:00,410 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:31:00,410 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:31:00,410 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:31:00,411 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:31:00,411 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:31:00,411 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:31:00,411 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:31:00,435 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states. [2020-10-14 08:31:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 08:31:00,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:31:00,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:31:00,453 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:31:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:31:00,461 INFO L82 PathProgramCache]: Analyzing trace with hash -425912833, now seen corresponding path program 1 times [2020-10-14 08:31:00,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:31:00,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4490904] [2020-10-14 08:31:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:31:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:01,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:01,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:02,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:02,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:02,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:05,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:05,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 08:31:05,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:31:05,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:31:05,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:05,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:05,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:31:05,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-14 08:31:05,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 08:31:05,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 08:31:06,764 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:31:06,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:31:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:06,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:06,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:06,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:31:06,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:31:06,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-14 08:31:06,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:06,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:06,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:31:06,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:31:06,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:31:06,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:31:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:31:06,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4490904] [2020-10-14 08:31:06,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:31:06,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:31:06,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254937685] [2020-10-14 08:31:06,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:31:06,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:31:06,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:31:06,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:31:06,920 INFO L87 Difference]: Start difference. First operand 331 states. Second operand 4 states. [2020-10-14 08:31:07,492 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-14 08:31:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:31:09,517 INFO L93 Difference]: Finished difference Result 598 states and 1032 transitions. [2020-10-14 08:31:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:31:09,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2020-10-14 08:31:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:31:09,537 INFO L225 Difference]: With dead ends: 598 [2020-10-14 08:31:09,537 INFO L226 Difference]: Without dead ends: 452 [2020-10-14 08:31:09,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:31:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-14 08:31:09,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 449. [2020-10-14 08:31:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-14 08:31:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 746 transitions. [2020-10-14 08:31:09,642 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 746 transitions. Word has length 114 [2020-10-14 08:31:09,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:31:09,643 INFO L479 AbstractCegarLoop]: Abstraction has 449 states and 746 transitions. [2020-10-14 08:31:09,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:31:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 746 transitions. [2020-10-14 08:31:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-14 08:31:09,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:31:09,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:31:09,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:31:09,647 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:31:09,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:31:09,648 INFO L82 PathProgramCache]: Analyzing trace with hash -182953907, now seen corresponding path program 1 times [2020-10-14 08:31:09,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:31:09,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976943022] [2020-10-14 08:31:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:31:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:09,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:09,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:09,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:10,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:10,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:11,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:11,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:14,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:14,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-14 08:31:14,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:31:14,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-14 08:31:14,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:14,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:14,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:31:14,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-14 08:31:14,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 08:31:14,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 08:31:15,156 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:31:15,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:31:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:15,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:15,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:15,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:31:15,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:31:15,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-14 08:31:15,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:15,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:15,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:31:15,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:31:15,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:31:15,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:31:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:31:15,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976943022] [2020-10-14 08:31:15,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:31:15,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:31:15,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717323093] [2020-10-14 08:31:15,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:31:15,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:31:15,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:31:15,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:31:15,243 INFO L87 Difference]: Start difference. First operand 449 states and 746 transitions. Second operand 4 states. [2020-10-14 08:31:15,603 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-14 08:31:17,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:31:17,578 INFO L93 Difference]: Finished difference Result 943 states and 1578 transitions. [2020-10-14 08:31:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:31:17,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-14 08:31:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:31:17,587 INFO L225 Difference]: With dead ends: 943 [2020-10-14 08:31:17,588 INFO L226 Difference]: Without dead ends: 687 [2020-10-14 08:31:17,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:31:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2020-10-14 08:31:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 683. [2020-10-14 08:31:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2020-10-14 08:31:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1138 transitions. [2020-10-14 08:31:17,636 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1138 transitions. Word has length 117 [2020-10-14 08:31:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:31:17,637 INFO L479 AbstractCegarLoop]: Abstraction has 683 states and 1138 transitions. [2020-10-14 08:31:17,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:31:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1138 transitions. [2020-10-14 08:31:17,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 08:31:17,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:31:17,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:31:17,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:31:17,643 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:31:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:31:17,646 INFO L82 PathProgramCache]: Analyzing trace with hash -423053149, now seen corresponding path program 1 times [2020-10-14 08:31:17,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:31:17,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853270966] [2020-10-14 08:31:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:31:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:17,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:17,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:18,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:18,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:18,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:22,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:22,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:22,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:22,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:22,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:22,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 08:31:22,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:31:22,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-14 08:31:22,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:22,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:22,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:31:22,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-14 08:31:22,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 08:31:22,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:31:23,179 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:31:23,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:31:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:23,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:23,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:23,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:31:23,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:31:23,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-14 08:31:23,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:23,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:23,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:31:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:31:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:31:23,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:31:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:31:23,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853270966] [2020-10-14 08:31:23,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:31:23,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:31:23,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838292398] [2020-10-14 08:31:23,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:31:23,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:31:23,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:31:23,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:31:23,250 INFO L87 Difference]: Start difference. First operand 683 states and 1138 transitions. Second operand 4 states. [2020-10-14 08:31:23,617 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-14 08:31:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:31:25,550 INFO L93 Difference]: Finished difference Result 1627 states and 2720 transitions. [2020-10-14 08:31:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:31:25,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2020-10-14 08:31:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:31:25,560 INFO L225 Difference]: With dead ends: 1627 [2020-10-14 08:31:25,560 INFO L226 Difference]: Without dead ends: 1137 [2020-10-14 08:31:25,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:31:25,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2020-10-14 08:31:25,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1131. [2020-10-14 08:31:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1131 states. [2020-10-14 08:31:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1882 transitions. [2020-10-14 08:31:25,629 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1882 transitions. Word has length 120 [2020-10-14 08:31:25,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:31:25,631 INFO L479 AbstractCegarLoop]: Abstraction has 1131 states and 1882 transitions. [2020-10-14 08:31:25,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:31:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1882 transitions. [2020-10-14 08:31:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-14 08:31:25,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:31:25,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:31:25,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:31:25,639 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:31:25,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:31:25,639 INFO L82 PathProgramCache]: Analyzing trace with hash 582238961, now seen corresponding path program 1 times [2020-10-14 08:31:25,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:31:25,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370149366] [2020-10-14 08:31:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:31:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:25,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:25,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:26,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:26,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:26,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:26,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:26,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:30,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:30,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-14 08:31:30,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:31:30,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 08:31:30,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:30,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:30,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:31:30,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-14 08:31:30,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 08:31:30,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:31,301 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:31:31,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:31:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:31,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:31,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:31,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:31:31,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:31:31,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 08:31:31,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:31,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:31,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:31:31,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:31:31,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:31:31,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:31:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:31:31,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370149366] [2020-10-14 08:31:31,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:31:31,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:31:31,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626150237] [2020-10-14 08:31:31,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:31:31,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:31:31,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:31:31,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:31:31,400 INFO L87 Difference]: Start difference. First operand 1131 states and 1882 transitions. Second operand 4 states. [2020-10-14 08:31:32,090 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-14 08:31:34,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:31:34,080 INFO L93 Difference]: Finished difference Result 2919 states and 4852 transitions. [2020-10-14 08:31:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:31:34,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-10-14 08:31:34,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:31:34,093 INFO L225 Difference]: With dead ends: 2919 [2020-10-14 08:31:34,094 INFO L226 Difference]: Without dead ends: 1981 [2020-10-14 08:31:34,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:31:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2020-10-14 08:31:34,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1971. [2020-10-14 08:31:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1971 states. [2020-10-14 08:31:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 3226 transitions. [2020-10-14 08:31:34,202 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 3226 transitions. Word has length 123 [2020-10-14 08:31:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:31:34,203 INFO L479 AbstractCegarLoop]: Abstraction has 1971 states and 3226 transitions. [2020-10-14 08:31:34,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:31:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 3226 transitions. [2020-10-14 08:31:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 08:31:34,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:31:34,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:31:34,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:31:34,210 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:31:34,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:31:34,211 INFO L82 PathProgramCache]: Analyzing trace with hash 606233927, now seen corresponding path program 1 times [2020-10-14 08:31:34,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:31:34,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045548083] [2020-10-14 08:31:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:31:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:34,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:34,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:34,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:34,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:35,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:35,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:35,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:35,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:39,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:39,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 08:31:39,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:31:39,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:31:39,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:39,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:39,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:31:39,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:31:39,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-14 08:31:39,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:39,814 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:31:39,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:31:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:39,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:39,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:39,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:31:39,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:31:39,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 08:31:39,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:39,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:39,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:31:39,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:31:39,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:31:39,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:31:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:31:39,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045548083] [2020-10-14 08:31:39,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:31:39,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:31:39,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321352370] [2020-10-14 08:31:39,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:31:39,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:31:39,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:31:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:31:39,904 INFO L87 Difference]: Start difference. First operand 1971 states and 3226 transitions. Second operand 5 states. [2020-10-14 08:31:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:31:42,739 INFO L93 Difference]: Finished difference Result 5745 states and 9398 transitions. [2020-10-14 08:31:42,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:31:42,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-14 08:31:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:31:42,760 INFO L225 Difference]: With dead ends: 5745 [2020-10-14 08:31:42,761 INFO L226 Difference]: Without dead ends: 3839 [2020-10-14 08:31:42,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:31:42,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3839 states. [2020-10-14 08:31:42,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3839 to 3837. [2020-10-14 08:31:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3837 states. [2020-10-14 08:31:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 6259 transitions. [2020-10-14 08:31:42,993 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 6259 transitions. Word has length 126 [2020-10-14 08:31:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:31:42,994 INFO L479 AbstractCegarLoop]: Abstraction has 3837 states and 6259 transitions. [2020-10-14 08:31:42,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:31:42,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 6259 transitions. [2020-10-14 08:31:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 08:31:42,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:31:42,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:31:43,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:31:43,000 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:31:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:31:43,000 INFO L82 PathProgramCache]: Analyzing trace with hash 692648329, now seen corresponding path program 1 times [2020-10-14 08:31:43,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:31:43,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290319426] [2020-10-14 08:31:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:31:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:43,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:43,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:43,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:43,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:43,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:43,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:43,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:44,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:44,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:48,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:48,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 08:31:48,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:31:48,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:31:48,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:48,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:48,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:31:48,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 08:31:48,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 08:31:48,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:48,426 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:31:48,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:31:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:48,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:48,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:48,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:31:48,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:31:48,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 08:31:48,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:48,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:48,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:31:48,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:31:48,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:31:48,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:31:48,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290319426] [2020-10-14 08:31:48,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:31:48,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:31:48,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473967157] [2020-10-14 08:31:48,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:31:48,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:31:48,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:31:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:31:48,503 INFO L87 Difference]: Start difference. First operand 3837 states and 6259 transitions. Second operand 4 states. [2020-10-14 08:31:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:31:51,803 INFO L93 Difference]: Finished difference Result 11207 states and 18269 transitions. [2020-10-14 08:31:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:31:51,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-14 08:31:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:31:51,846 INFO L225 Difference]: With dead ends: 11207 [2020-10-14 08:31:51,846 INFO L226 Difference]: Without dead ends: 7465 [2020-10-14 08:31:51,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:31:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7465 states. [2020-10-14 08:31:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7465 to 7463. [2020-10-14 08:31:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7463 states. [2020-10-14 08:31:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7463 states to 7463 states and 12124 transitions. [2020-10-14 08:31:52,315 INFO L78 Accepts]: Start accepts. Automaton has 7463 states and 12124 transitions. Word has length 128 [2020-10-14 08:31:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:31:52,316 INFO L479 AbstractCegarLoop]: Abstraction has 7463 states and 12124 transitions. [2020-10-14 08:31:52,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:31:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 7463 states and 12124 transitions. [2020-10-14 08:31:52,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 08:31:52,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:31:52,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:31:52,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:31:52,325 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:31:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:31:52,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1511226290, now seen corresponding path program 1 times [2020-10-14 08:31:52,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:31:52,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222744086] [2020-10-14 08:31:52,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:31:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:52,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:52,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:52,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:52,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:52,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:53,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:53,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:53,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:53,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:53,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:57,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:57,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 08:31:57,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 08:31:57,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 08:31:57,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:57,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:57,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:31:57,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 08:31:57,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 08:31:57,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:57,738 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:31:57,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:31:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:57,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:57,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:57,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:31:57,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:31:57,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:31:57,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:57,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:57,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:31:57,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:31:57,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:31:57,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:31:57,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222744086] [2020-10-14 08:31:57,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:31:57,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:31:57,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494575939] [2020-10-14 08:31:57,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:31:57,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:31:57,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:31:57,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:31:57,793 INFO L87 Difference]: Start difference. First operand 7463 states and 12124 transitions. Second operand 4 states. [2020-10-14 08:32:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:32:01,368 INFO L93 Difference]: Finished difference Result 22201 states and 36034 transitions. [2020-10-14 08:32:01,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:32:01,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-14 08:32:01,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:32:01,440 INFO L225 Difference]: With dead ends: 22201 [2020-10-14 08:32:01,440 INFO L226 Difference]: Without dead ends: 14834 [2020-10-14 08:32:01,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:32:01,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14834 states. [2020-10-14 08:32:01,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14834 to 7480. [2020-10-14 08:32:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7480 states. [2020-10-14 08:32:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7480 states to 7480 states and 12146 transitions. [2020-10-14 08:32:02,013 INFO L78 Accepts]: Start accepts. Automaton has 7480 states and 12146 transitions. Word has length 128 [2020-10-14 08:32:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:32:02,013 INFO L479 AbstractCegarLoop]: Abstraction has 7480 states and 12146 transitions. [2020-10-14 08:32:02,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:32:02,013 INFO L276 IsEmpty]: Start isEmpty. Operand 7480 states and 12146 transitions. [2020-10-14 08:32:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 08:32:02,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:32:02,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:32:02,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:32:02,021 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:32:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:32:02,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1574028649, now seen corresponding path program 1 times [2020-10-14 08:32:02,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:32:02,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529510151] [2020-10-14 08:32:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:32:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:02,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:02,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:02,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:02,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:02,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:02,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:02,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:02,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:02,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:03,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:07,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:07,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 08:32:07,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 08:32:07,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 08:32:07,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:07,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:07,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:32:07,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-14 08:32:07,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 08:32:07,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:07,425 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:32:07,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:32:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:07,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:07,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:07,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:32:07,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:32:07,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 08:32:07,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:07,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:07,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:32:07,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:32:07,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:32:07,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:32:07,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529510151] [2020-10-14 08:32:07,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:32:07,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:32:07,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456305187] [2020-10-14 08:32:07,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:32:07,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:32:07,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:32:07,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:32:07,487 INFO L87 Difference]: Start difference. First operand 7480 states and 12146 transitions. Second operand 4 states. [2020-10-14 08:32:07,879 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-14 08:32:10,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:32:10,066 INFO L93 Difference]: Finished difference Result 14148 states and 23072 transitions. [2020-10-14 08:32:10,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:32:10,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-14 08:32:10,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:32:10,102 INFO L225 Difference]: With dead ends: 14148 [2020-10-14 08:32:10,102 INFO L226 Difference]: Without dead ends: 10562 [2020-10-14 08:32:10,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:32:10,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10562 states. [2020-10-14 08:32:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10562 to 10560. [2020-10-14 08:32:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10560 states. [2020-10-14 08:32:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10560 states to 10560 states and 17134 transitions. [2020-10-14 08:32:10,775 INFO L78 Accepts]: Start accepts. Automaton has 10560 states and 17134 transitions. Word has length 128 [2020-10-14 08:32:10,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:32:10,775 INFO L479 AbstractCegarLoop]: Abstraction has 10560 states and 17134 transitions. [2020-10-14 08:32:10,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:32:10,775 INFO L276 IsEmpty]: Start isEmpty. Operand 10560 states and 17134 transitions. [2020-10-14 08:32:10,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-14 08:32:10,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:32:10,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:32:10,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:32:10,782 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:32:10,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:32:10,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1183914421, now seen corresponding path program 1 times [2020-10-14 08:32:10,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:32:10,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439757268] [2020-10-14 08:32:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:32:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:10,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:10,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:10,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:11,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:11,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:11,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:11,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:11,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:15,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:15,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-14 08:32:15,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:32:15,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 08:32:15,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:15,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:15,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:32:15,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 08:32:15,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 08:32:15,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:16,164 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:32:16,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:32:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:16,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:16,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:16,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:32:16,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:32:16,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:32:16,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:16,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:16,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:32:16,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:32:16,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:32:16,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:32:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:32:16,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439757268] [2020-10-14 08:32:16,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:32:16,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:32:16,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382250678] [2020-10-14 08:32:16,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:32:16,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:32:16,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:32:16,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:32:16,209 INFO L87 Difference]: Start difference. First operand 10560 states and 17134 transitions. Second operand 4 states. [2020-10-14 08:32:19,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:32:19,926 INFO L93 Difference]: Finished difference Result 31479 states and 51052 transitions. [2020-10-14 08:32:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:32:19,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-10-14 08:32:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:32:19,979 INFO L225 Difference]: With dead ends: 31479 [2020-10-14 08:32:19,980 INFO L226 Difference]: Without dead ends: 21028 [2020-10-14 08:32:20,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:32:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2020-10-14 08:32:20,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 10594. [2020-10-14 08:32:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10594 states. [2020-10-14 08:32:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10594 states to 10594 states and 17182 transitions. [2020-10-14 08:32:20,722 INFO L78 Accepts]: Start accepts. Automaton has 10594 states and 17182 transitions. Word has length 129 [2020-10-14 08:32:20,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:32:20,722 INFO L479 AbstractCegarLoop]: Abstraction has 10594 states and 17182 transitions. [2020-10-14 08:32:20,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:32:20,722 INFO L276 IsEmpty]: Start isEmpty. Operand 10594 states and 17182 transitions. [2020-10-14 08:32:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-14 08:32:20,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:32:20,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:32:20,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:32:20,729 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:32:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:32:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash -827360761, now seen corresponding path program 1 times [2020-10-14 08:32:20,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:32:20,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729387006] [2020-10-14 08:32:20,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:32:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:20,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:20,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:20,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:21,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:21,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:22,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:22,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:25,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:25,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-14 08:32:25,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:32:25,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 08:32:25,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:25,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:32:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:32:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-14 08:32:25,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:32:26,240 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:32:26,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:32:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:26,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:26,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:26,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:32:26,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:32:26,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:32:26,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:26,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:26,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:32:26,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:32:26,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:32:26,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:32:26,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729387006] [2020-10-14 08:32:26,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:32:26,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:32:26,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020226303] [2020-10-14 08:32:26,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:32:26,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:32:26,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:32:26,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:32:26,292 INFO L87 Difference]: Start difference. First operand 10594 states and 17182 transitions. Second operand 5 states. [2020-10-14 08:32:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:32:29,782 INFO L93 Difference]: Finished difference Result 31132 states and 50517 transitions. [2020-10-14 08:32:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:32:29,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-14 08:32:29,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:32:29,815 INFO L225 Difference]: With dead ends: 31132 [2020-10-14 08:32:29,815 INFO L226 Difference]: Without dead ends: 20698 [2020-10-14 08:32:29,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:32:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20698 states. [2020-10-14 08:32:31,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20698 to 20696. [2020-10-14 08:32:31,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20696 states. [2020-10-14 08:32:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20696 states to 20696 states and 33435 transitions. [2020-10-14 08:32:31,322 INFO L78 Accepts]: Start accepts. Automaton has 20696 states and 33435 transitions. Word has length 129 [2020-10-14 08:32:31,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:32:31,322 INFO L479 AbstractCegarLoop]: Abstraction has 20696 states and 33435 transitions. [2020-10-14 08:32:31,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:32:31,322 INFO L276 IsEmpty]: Start isEmpty. Operand 20696 states and 33435 transitions. [2020-10-14 08:32:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 08:32:31,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:32:31,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:32:31,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:32:31,331 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:32:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:32:31,331 INFO L82 PathProgramCache]: Analyzing trace with hash 372803549, now seen corresponding path program 1 times [2020-10-14 08:32:31,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:32:31,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776625136] [2020-10-14 08:32:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:32:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:31,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:31,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:31,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:31,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:32,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:32,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:33,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:33,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:33,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:33,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:36,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:36,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 08:32:36,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 08:32:36,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 08:32:36,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:36,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:36,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:32:36,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-14 08:32:36,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 08:32:36,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:36,737 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:32:36,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:32:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:36,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:36,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:36,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:32:36,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:32:36,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 08:32:36,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:36,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:36,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:32:36,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:32:36,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:32:36,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:32:36,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776625136] [2020-10-14 08:32:36,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:32:36,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:32:36,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344980077] [2020-10-14 08:32:36,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:32:36,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:32:36,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:32:36,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:32:36,787 INFO L87 Difference]: Start difference. First operand 20696 states and 33435 transitions. Second operand 4 states. [2020-10-14 08:32:37,167 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-14 08:32:40,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:32:40,881 INFO L93 Difference]: Finished difference Result 38028 states and 61805 transitions. [2020-10-14 08:32:40,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:32:40,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2020-10-14 08:32:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:32:40,926 INFO L225 Difference]: With dead ends: 38028 [2020-10-14 08:32:40,926 INFO L226 Difference]: Without dead ends: 28018 [2020-10-14 08:32:40,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:32:40,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28018 states. [2020-10-14 08:32:42,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28018 to 28016. [2020-10-14 08:32:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28016 states. [2020-10-14 08:32:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28016 states to 28016 states and 45267 transitions. [2020-10-14 08:32:42,654 INFO L78 Accepts]: Start accepts. Automaton has 28016 states and 45267 transitions. Word has length 130 [2020-10-14 08:32:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:32:42,655 INFO L479 AbstractCegarLoop]: Abstraction has 28016 states and 45267 transitions. [2020-10-14 08:32:42,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:32:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 28016 states and 45267 transitions. [2020-10-14 08:32:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-14 08:32:42,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:32:42,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:32:42,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:32:42,660 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:32:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:32:42,660 INFO L82 PathProgramCache]: Analyzing trace with hash -948505091, now seen corresponding path program 1 times [2020-10-14 08:32:42,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:32:42,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139659953] [2020-10-14 08:32:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:32:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:42,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:42,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:42,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:42,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:43,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:43,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:44,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:44,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:44,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:47,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:47,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 08:32:47,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:32:47,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:32:47,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:47,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:47,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:32:47,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 08:32:47,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 08:32:47,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:48,017 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:32:48,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:32:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:48,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:48,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:48,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:32:48,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:32:48,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:32:48,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:48,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:32:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:32:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:32:48,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:32:48,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139659953] [2020-10-14 08:32:48,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:32:48,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:32:48,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173653741] [2020-10-14 08:32:48,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:32:48,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:32:48,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:32:48,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:32:48,065 INFO L87 Difference]: Start difference. First operand 28016 states and 45267 transitions. Second operand 4 states. [2020-10-14 08:32:52,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:32:52,903 INFO L93 Difference]: Finished difference Result 83939 states and 135611 transitions. [2020-10-14 08:32:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:32:52,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-10-14 08:32:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:32:53,009 INFO L225 Difference]: With dead ends: 83939 [2020-10-14 08:32:53,009 INFO L226 Difference]: Without dead ends: 55984 [2020-10-14 08:32:53,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:32:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55984 states. [2020-10-14 08:32:56,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55984 to 28040. [2020-10-14 08:32:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28040 states. [2020-10-14 08:32:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28040 states to 28040 states and 45303 transitions. [2020-10-14 08:32:56,385 INFO L78 Accepts]: Start accepts. Automaton has 28040 states and 45303 transitions. Word has length 131 [2020-10-14 08:32:56,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:32:56,386 INFO L479 AbstractCegarLoop]: Abstraction has 28040 states and 45303 transitions. [2020-10-14 08:32:56,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:32:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 28040 states and 45303 transitions. [2020-10-14 08:32:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-14 08:32:56,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:32:56,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:32:56,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:32:56,391 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:32:56,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:32:56,391 INFO L82 PathProgramCache]: Analyzing trace with hash 155815330, now seen corresponding path program 1 times [2020-10-14 08:32:56,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:32:56,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106679371] [2020-10-14 08:32:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:32:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:56,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:56,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:56,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:56,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:56,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:57,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:57,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:57,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:01,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:33:01,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 08:33:01,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:33:01,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:33:01,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:33:01,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:33:01,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:33:01,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 08:33:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 08:33:01,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:33:01,784 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:33:01,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:33:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:33:01,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:01,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:33:01,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:33:01,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:33:01,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 08:33:01,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:33:01,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:33:01,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:33:01,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:33:01,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:33:01,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:33:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:33:01,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106679371] [2020-10-14 08:33:01,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:33:01,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:33:01,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901622601] [2020-10-14 08:33:01,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:33:01,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:33:01,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:33:01,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:33:01,855 INFO L87 Difference]: Start difference. First operand 28040 states and 45303 transitions. Second operand 4 states. [2020-10-14 08:33:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:33:08,412 INFO L93 Difference]: Finished difference Result 82174 states and 132791 transitions. [2020-10-14 08:33:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:33:08,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-10-14 08:33:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:33:08,486 INFO L225 Difference]: With dead ends: 82174 [2020-10-14 08:33:08,486 INFO L226 Difference]: Without dead ends: 54648 [2020-10-14 08:33:08,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:33:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54648 states. [2020-10-14 08:33:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54648 to 54642. [2020-10-14 08:33:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54642 states. [2020-10-14 08:33:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54642 states to 54642 states and 87895 transitions. [2020-10-14 08:33:13,594 INFO L78 Accepts]: Start accepts. Automaton has 54642 states and 87895 transitions. Word has length 131 [2020-10-14 08:33:13,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:33:13,595 INFO L479 AbstractCegarLoop]: Abstraction has 54642 states and 87895 transitions. [2020-10-14 08:33:13,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:33:13,595 INFO L276 IsEmpty]: Start isEmpty. Operand 54642 states and 87895 transitions. [2020-10-14 08:33:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 08:33:13,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:33:13,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:33:13,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:33:13,602 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:33:13,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:33:13,603 INFO L82 PathProgramCache]: Analyzing trace with hash -771921410, now seen corresponding path program 1 times [2020-10-14 08:33:13,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:33:13,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342341887] [2020-10-14 08:33:13,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:33:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:33:13,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:13,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:13,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:13,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:14,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:14,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:16,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:18,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:33:18,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 08:33:18,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:33:18,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 08:33:18,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:33:18,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:33:18,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:33:18,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:33:18,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-14 08:33:18,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:33:19,061 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:33:19,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:33:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:33:19,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:19,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:33:19,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:33:19,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:33:19,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:33:19,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:33:19,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:33:19,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:33:19,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:33:19,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:33:19,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:33:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:33:19,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342341887] [2020-10-14 08:33:19,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:33:19,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:33:19,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484951552] [2020-10-14 08:33:19,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:33:19,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:33:19,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:33:19,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:33:19,116 INFO L87 Difference]: Start difference. First operand 54642 states and 87895 transitions. Second operand 5 states. [2020-10-14 08:33:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:33:30,282 INFO L93 Difference]: Finished difference Result 161175 states and 259329 transitions. [2020-10-14 08:33:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:33:30,283 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-10-14 08:33:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:33:30,433 INFO L225 Difference]: With dead ends: 161175 [2020-10-14 08:33:30,433 INFO L226 Difference]: Without dead ends: 107253 [2020-10-14 08:33:30,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:33:30,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107253 states. [2020-10-14 08:33:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107253 to 107251. [2020-10-14 08:33:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107251 states. [2020-10-14 08:33:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107251 states to 107251 states and 171991 transitions. [2020-10-14 08:33:41,476 INFO L78 Accepts]: Start accepts. Automaton has 107251 states and 171991 transitions. Word has length 132 [2020-10-14 08:33:41,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:33:41,476 INFO L479 AbstractCegarLoop]: Abstraction has 107251 states and 171991 transitions. [2020-10-14 08:33:41,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:33:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 107251 states and 171991 transitions. [2020-10-14 08:33:41,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 08:33:41,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:33:41,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:33:41,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:33:41,489 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:33:41,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:33:41,489 INFO L82 PathProgramCache]: Analyzing trace with hash 712874877, now seen corresponding path program 1 times [2020-10-14 08:33:41,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:33:41,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104929765] [2020-10-14 08:33:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:33:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:33:41,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:41,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:41,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:41,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:41,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:42,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:42,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:46,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:33:46,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 08:33:46,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:33:46,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 08:33:46,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:33:46,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:33:46,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:33:46,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 08:33:46,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 08:33:46,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:33:46,904 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-14 08:33:46,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:33:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:33:46,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:46,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:33:46,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:33:46,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:33:46,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:33:46,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:33:46,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:33:46,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:33:46,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:33:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:33:46,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:33:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:33:46,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104929765] [2020-10-14 08:33:46,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:33:46,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:33:46,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443944081] [2020-10-14 08:33:46,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:33:46,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:33:46,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:33:46,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:33:46,951 INFO L87 Difference]: Start difference. First operand 107251 states and 171991 transitions. Second operand 4 states. [2020-10-14 08:34:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:34:07,560 INFO L93 Difference]: Finished difference Result 313803 states and 503335 transitions. [2020-10-14 08:34:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:34:07,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-10-14 08:34:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:34:07,933 INFO L225 Difference]: With dead ends: 313803 [2020-10-14 08:34:07,934 INFO L226 Difference]: Without dead ends: 208489 [2020-10-14 08:34:08,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:34:08,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208489 states. [2020-10-14 08:34:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208489 to 208487. [2020-10-14 08:34:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208487 states. [2020-10-14 08:34:29,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208487 states to 208487 states and 332989 transitions. [2020-10-14 08:34:29,768 INFO L78 Accepts]: Start accepts. Automaton has 208487 states and 332989 transitions. Word has length 134 [2020-10-14 08:34:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:34:29,769 INFO L479 AbstractCegarLoop]: Abstraction has 208487 states and 332989 transitions. [2020-10-14 08:34:29,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:34:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 208487 states and 332989 transitions. [2020-10-14 08:34:29,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-14 08:34:29,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:34:29,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:34:29,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 08:34:29,793 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:34:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:34:29,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1412053009, now seen corresponding path program 1 times [2020-10-14 08:34:29,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:34:29,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196414647] [2020-10-14 08:34:29,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:34:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:34:29,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:29,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:29,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:30,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:30,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:34:30,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking...