/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:56:06,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:56:06,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:56:06,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:56:06,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:56:06,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:56:06,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:56:06,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:56:06,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:56:06,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:56:06,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:56:06,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:56:06,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:56:06,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:56:06,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:56:06,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:56:06,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:56:06,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:56:06,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:56:06,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:56:06,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:56:06,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:56:06,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:56:06,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:56:06,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:56:06,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:56:06,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:56:06,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:56:06,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:56:06,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:56:06,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:56:06,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:56:06,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:56:06,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:56:06,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:56:06,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:56:06,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:56:06,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:56:06,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:56:06,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:56:06,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:56:06,817 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 08:56:06,840 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:56:06,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:56:06,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:56:06,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:56:06,842 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:56:06,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:56:06,842 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:56:06,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:56:06,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:56:06,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:56:06,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:56:06,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:56:06,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:56:06,843 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:56:06,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:56:06,844 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:56:06,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:56:06,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:56:06,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:56:06,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:56:06,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:56:06,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:56:06,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:56:06,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:56:06,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:56:06,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:56:06,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:56:06,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:56:06,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:56:06,847 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 08:56:07,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:56:07,177 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:56:07,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:56:07,185 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:56:07,186 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:56:07,186 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2020-10-14 08:56:07,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40a5bd8bc/3e5fc74ae7ff48108bf54cc65fb573e2/FLAGcd88c9193 [2020-10-14 08:56:07,775 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:56:07,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2020-10-14 08:56:07,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40a5bd8bc/3e5fc74ae7ff48108bf54cc65fb573e2/FLAGcd88c9193 [2020-10-14 08:56:08,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40a5bd8bc/3e5fc74ae7ff48108bf54cc65fb573e2 [2020-10-14 08:56:08,088 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:56:08,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:56:08,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:56:08,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:56:08,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:56:08,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:56:08" (1/1) ... [2020-10-14 08:56:08,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16febf07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:56:08, skipping insertion in model container [2020-10-14 08:56:08,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:56:08" (1/1) ... [2020-10-14 08:56:08,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:56:08,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:56:08,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:56:08,484 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:56:08,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:56:08,696 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:56:08,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:56:08 WrapperNode [2020-10-14 08:56:08,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:56:08,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:56:08,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:56:08,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:56:08,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:56:08" (1/1) ... [2020-10-14 08:56:08,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:56:08" (1/1) ... [2020-10-14 08:56:08,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:56:08" (1/1) ... [2020-10-14 08:56:08,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:56:08" (1/1) ... [2020-10-14 08:56:08,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:56:08" (1/1) ... [2020-10-14 08:56:08,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:56:08" (1/1) ... [2020-10-14 08:56:08,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:56:08" (1/1) ... [2020-10-14 08:56:08,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:56:08,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:56:08,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:56:08,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:56:08,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:56:08" (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 08:56:08,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:56:08,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:56:08,833 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:56:08,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:56:08,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:56:08,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:56:08,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:56:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:56:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:56:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:56:08,836 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:56:08,836 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:56:08,836 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:56:08,836 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:56:08,836 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:56:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 08:56:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 08:56:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-14 08:56:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-14 08:56:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:56:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:56:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:56:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:56:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:56:09,594 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:56:09,595 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:56:09,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:56:09 BoogieIcfgContainer [2020-10-14 08:56:09,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:56:09,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:56:09,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:56:09,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:56:09,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:56:08" (1/3) ... [2020-10-14 08:56:09,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a35826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:56:09, skipping insertion in model container [2020-10-14 08:56:09,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:56:08" (2/3) ... [2020-10-14 08:56:09,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a35826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:56:09, skipping insertion in model container [2020-10-14 08:56:09,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:56:09" (3/3) ... [2020-10-14 08:56:09,618 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2020-10-14 08:56:09,628 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:56:09,648 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:56:09,663 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:56:09,684 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:56:09,684 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:56:09,684 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:56:09,685 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:56:09,685 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:56:09,685 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:56:09,685 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:56:09,685 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:56:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states. [2020-10-14 08:56:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 08:56:09,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:09,722 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] [2020-10-14 08:56:09,723 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:09,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1460335277, now seen corresponding path program 1 times [2020-10-14 08:56:09,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:09,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972621199] [2020-10-14 08:56:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:10,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:10,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:10,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:10,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:11,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:11,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:13,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:13,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:15,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:15,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 08:56:15,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:56:15,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 08:56:15,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:15,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:15,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:56:15,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 08:56:15,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 08:56:15,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 08:56:15,676 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 08:56:15,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:15,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:15,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:15,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:15,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:15,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 08:56:15,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:15,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:15,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:56:15,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:15,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:56:15,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:56:15,762 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 08:56:15,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972621199] [2020-10-14 08:56:15,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:15,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:56:15,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121151102] [2020-10-14 08:56:15,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:56:15,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:15,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:56:15,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:56:15,802 INFO L87 Difference]: Start difference. First operand 141 states. Second operand 4 states. [2020-10-14 08:56:16,275 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-14 08:56:17,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:17,811 INFO L93 Difference]: Finished difference Result 301 states and 491 transitions. [2020-10-14 08:56:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:56:17,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-10-14 08:56:17,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:17,833 INFO L225 Difference]: With dead ends: 301 [2020-10-14 08:56:17,833 INFO L226 Difference]: Without dead ends: 209 [2020-10-14 08:56:17,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:56:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-14 08:56:17,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-14 08:56:17,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-14 08:56:17,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 296 transitions. [2020-10-14 08:56:17,926 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 296 transitions. Word has length 90 [2020-10-14 08:56:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:17,928 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 296 transitions. [2020-10-14 08:56:17,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:56:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 296 transitions. [2020-10-14 08:56:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-14 08:56:17,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:17,932 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] [2020-10-14 08:56:17,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:56:17,933 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:17,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1376746649, now seen corresponding path program 1 times [2020-10-14 08:56:17,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:17,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595012453] [2020-10-14 08:56:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:18,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:18,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:18,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:18,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:18,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:19,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:20,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:23,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:23,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 08:56:23,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:56:23,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 08:56:23,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:23,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:23,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:56:23,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 08:56:23,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 08:56:23,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-14 08:56:23,362 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 08:56:23,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:23,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:23,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:23,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:23,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:23,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:56:23,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:23,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:23,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:56:23,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:23,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:56:23,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:56:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:56:23,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595012453] [2020-10-14 08:56:23,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:23,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:56:23,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92844310] [2020-10-14 08:56:23,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:56:23,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:23,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:56:23,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:56:23,418 INFO L87 Difference]: Start difference. First operand 207 states and 296 transitions. Second operand 4 states. [2020-10-14 08:56:23,851 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-14 08:56:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:24,804 INFO L93 Difference]: Finished difference Result 491 states and 748 transitions. [2020-10-14 08:56:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:56:24,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-10-14 08:56:24,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:24,811 INFO L225 Difference]: With dead ends: 491 [2020-10-14 08:56:24,811 INFO L226 Difference]: Without dead ends: 341 [2020-10-14 08:56:24,813 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 08:56:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-14 08:56:24,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 339. [2020-10-14 08:56:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-14 08:56:24,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 506 transitions. [2020-10-14 08:56:24,874 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 506 transitions. Word has length 91 [2020-10-14 08:56:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:24,877 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 506 transitions. [2020-10-14 08:56:24,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:56:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 506 transitions. [2020-10-14 08:56:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 08:56:24,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:24,886 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] [2020-10-14 08:56:24,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:56:24,886 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:24,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1783932663, now seen corresponding path program 1 times [2020-10-14 08:56:24,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:24,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888115178] [2020-10-14 08:56:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:24,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:25,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:25,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:25,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:25,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:25,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:29,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:29,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 08:56:29,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:56:29,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 08:56:29,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:29,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:29,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:56:29,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 08:56:29,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 08:56:29,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:56:30,231 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 08:56:30,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:30,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:30,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:30,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:30,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:30,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:56:30,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:30,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:30,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:56:30,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:30,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:56:30,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:56:30,278 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 08:56:30,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888115178] [2020-10-14 08:56:30,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:30,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:56:30,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843765753] [2020-10-14 08:56:30,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:56:30,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:30,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:56:30,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:56:30,284 INFO L87 Difference]: Start difference. First operand 339 states and 506 transitions. Second operand 4 states. [2020-10-14 08:56:30,632 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-14 08:56:31,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:31,269 INFO L93 Difference]: Finished difference Result 871 states and 1352 transitions. [2020-10-14 08:56:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:56:31,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-10-14 08:56:31,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:31,276 INFO L225 Difference]: With dead ends: 871 [2020-10-14 08:56:31,276 INFO L226 Difference]: Without dead ends: 589 [2020-10-14 08:56:31,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:56:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-10-14 08:56:31,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 587. [2020-10-14 08:56:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-10-14 08:56:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 898 transitions. [2020-10-14 08:56:31,317 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 898 transitions. Word has length 92 [2020-10-14 08:56:31,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:31,320 INFO L479 AbstractCegarLoop]: Abstraction has 587 states and 898 transitions. [2020-10-14 08:56:31,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:56:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 898 transitions. [2020-10-14 08:56:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-14 08:56:31,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:31,326 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] [2020-10-14 08:56:31,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:56:31,326 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:31,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1979423551, now seen corresponding path program 1 times [2020-10-14 08:56:31,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:31,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893013219] [2020-10-14 08:56:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:31,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:31,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:31,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:31,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:32,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:32,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:36,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:36,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-14 08:56:36,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:56:36,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:56:36,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:36,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:56:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 08:56:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 08:56:36,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:56:36,611 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 08:56:36,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:36,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:36,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:36,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:36,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:36,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:56:36,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:36,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:36,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:56:36,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:36,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:56:36,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:56:36,648 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 08:56:36,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893013219] [2020-10-14 08:56:36,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:36,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:56:36,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928998794] [2020-10-14 08:56:36,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:56:36,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:36,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:56:36,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:56:36,651 INFO L87 Difference]: Start difference. First operand 587 states and 898 transitions. Second operand 4 states. [2020-10-14 08:56:36,870 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-14 08:56:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:37,478 INFO L93 Difference]: Finished difference Result 1583 states and 2476 transitions. [2020-10-14 08:56:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:56:37,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-14 08:56:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:37,488 INFO L225 Difference]: With dead ends: 1583 [2020-10-14 08:56:37,489 INFO L226 Difference]: Without dead ends: 1053 [2020-10-14 08:56:37,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:56:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2020-10-14 08:56:37,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1051. [2020-10-14 08:56:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2020-10-14 08:56:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1626 transitions. [2020-10-14 08:56:37,542 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1626 transitions. Word has length 93 [2020-10-14 08:56:37,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:37,544 INFO L479 AbstractCegarLoop]: Abstraction has 1051 states and 1626 transitions. [2020-10-14 08:56:37,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:56:37,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1626 transitions. [2020-10-14 08:56:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 08:56:37,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:37,551 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] [2020-10-14 08:56:37,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:56:37,551 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:37,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:37,552 INFO L82 PathProgramCache]: Analyzing trace with hash -454565625, now seen corresponding path program 1 times [2020-10-14 08:56:37,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:37,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351526880] [2020-10-14 08:56:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:37,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:37,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:37,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:37,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:38,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:42,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:42,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 08:56:42,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:56:42,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:56:42,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:42,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:42,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:56:42,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 08:56:42,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 08:56:42,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:42,859 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 08:56:42,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:42,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:42,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:42,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:42,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:42,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 08:56:42,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:42,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:42,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:56:42,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:42,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:56:42,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:56:42,924 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 08:56:42,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351526880] [2020-10-14 08:56:42,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:42,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:56:42,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271078314] [2020-10-14 08:56:42,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:56:42,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:42,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:56:42,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:56:42,927 INFO L87 Difference]: Start difference. First operand 1051 states and 1626 transitions. Second operand 4 states. [2020-10-14 08:56:43,249 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-14 08:56:44,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:44,216 INFO L93 Difference]: Finished difference Result 2911 states and 4556 transitions. [2020-10-14 08:56:44,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:56:44,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-10-14 08:56:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:44,230 INFO L225 Difference]: With dead ends: 2911 [2020-10-14 08:56:44,230 INFO L226 Difference]: Without dead ends: 1917 [2020-10-14 08:56:44,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:56:44,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2020-10-14 08:56:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1915. [2020-10-14 08:56:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1915 states. [2020-10-14 08:56:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2970 transitions. [2020-10-14 08:56:44,342 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2970 transitions. Word has length 94 [2020-10-14 08:56:44,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:44,342 INFO L479 AbstractCegarLoop]: Abstraction has 1915 states and 2970 transitions. [2020-10-14 08:56:44,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:56:44,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2970 transitions. [2020-10-14 08:56:44,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-14 08:56:44,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:44,343 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] [2020-10-14 08:56:44,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:56:44,344 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:44,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:44,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1787333693, now seen corresponding path program 1 times [2020-10-14 08:56:44,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:44,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095652376] [2020-10-14 08:56:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:44,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:44,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:44,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:44,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:44,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:46,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:49,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:49,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 08:56:49,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:56:49,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:56:49,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:49,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:49,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:56:49,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:56:49,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 08:56:49,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:49,638 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 08:56:49,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:49,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:49,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:49,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:49,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:49,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:56:49,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:49,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:49,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:56:49,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:49,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:56:49,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:56:49,689 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 08:56:49,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095652376] [2020-10-14 08:56:49,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:49,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:56:49,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194810833] [2020-10-14 08:56:49,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:56:49,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:49,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:56:49,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:56:49,694 INFO L87 Difference]: Start difference. First operand 1915 states and 2970 transitions. Second operand 4 states. [2020-10-14 08:56:49,917 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-14 08:56:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:50,653 INFO L93 Difference]: Finished difference Result 5375 states and 8380 transitions. [2020-10-14 08:56:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:56:50,654 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-14 08:56:50,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:50,674 INFO L225 Difference]: With dead ends: 5375 [2020-10-14 08:56:50,674 INFO L226 Difference]: Without dead ends: 3517 [2020-10-14 08:56:50,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:56:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3517 states. [2020-10-14 08:56:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3517 to 3515. [2020-10-14 08:56:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3515 states. [2020-10-14 08:56:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3515 states to 3515 states and 5434 transitions. [2020-10-14 08:56:50,872 INFO L78 Accepts]: Start accepts. Automaton has 3515 states and 5434 transitions. Word has length 95 [2020-10-14 08:56:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:50,872 INFO L479 AbstractCegarLoop]: Abstraction has 3515 states and 5434 transitions. [2020-10-14 08:56:50,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:56:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3515 states and 5434 transitions. [2020-10-14 08:56:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 08:56:50,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:50,874 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] [2020-10-14 08:56:50,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:56:50,874 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:50,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:50,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1447489406, now seen corresponding path program 1 times [2020-10-14 08:56:50,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:50,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377177095] [2020-10-14 08:56:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:50,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:50,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:51,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:51,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:51,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:51,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:51,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:55,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:55,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 08:56:55,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:56:55,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 08:56:55,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:55,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:55,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:56:55,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:56:55,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 08:56:55,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:56,121 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 08:56:56,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:56,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:56,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:56,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:56,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:56,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:56:56,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:56,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:56,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:56:56,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:56,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:56:56,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:56:56,169 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 08:56:56,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377177095] [2020-10-14 08:56:56,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:56,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:56:56,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101411923] [2020-10-14 08:56:56,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:56:56,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:56,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:56:56,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:56:56,172 INFO L87 Difference]: Start difference. First operand 3515 states and 5434 transitions. Second operand 4 states. [2020-10-14 08:56:56,401 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-14 08:56:57,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:57,302 INFO L93 Difference]: Finished difference Result 9919 states and 15356 transitions. [2020-10-14 08:56:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:56:57,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-14 08:56:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:57,334 INFO L225 Difference]: With dead ends: 9919 [2020-10-14 08:56:57,334 INFO L226 Difference]: Without dead ends: 6461 [2020-10-14 08:56:57,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:56:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6461 states. [2020-10-14 08:56:57,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6461 to 6459. [2020-10-14 08:56:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6459 states. [2020-10-14 08:56:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6459 states to 6459 states and 9914 transitions. [2020-10-14 08:56:57,666 INFO L78 Accepts]: Start accepts. Automaton has 6459 states and 9914 transitions. Word has length 96 [2020-10-14 08:56:57,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:57,666 INFO L479 AbstractCegarLoop]: Abstraction has 6459 states and 9914 transitions. [2020-10-14 08:56:57,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:56:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6459 states and 9914 transitions. [2020-10-14 08:56:57,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 08:56:57,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:57,668 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] [2020-10-14 08:56:57,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:56:57,669 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:57,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1181901600, now seen corresponding path program 1 times [2020-10-14 08:56:57,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:57,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7115939] [2020-10-14 08:56:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:57,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:57,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:57,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:57,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:57,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:58,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:58,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:00,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:00,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:00,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:01,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:02,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:02,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 08:57:02,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 08:57:02,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 08:57:02,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:02,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:02,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:57:02,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:57:02,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 08:57:02,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:03,009 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 08:57:03,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:57:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:03,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:03,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:03,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:57:03,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:57:03,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 08:57:03,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:03,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:03,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:57:03,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:57:03,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:57:03,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:03,067 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 08:57:03,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7115939] [2020-10-14 08:57:03,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:57:03,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:57:03,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545303636] [2020-10-14 08:57:03,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:57:03,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:57:03,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:57:03,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:57:03,069 INFO L87 Difference]: Start difference. First operand 6459 states and 9914 transitions. Second operand 6 states. [2020-10-14 08:57:03,276 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-14 08:57:04,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:57:04,402 INFO L93 Difference]: Finished difference Result 19199 states and 29500 transitions. [2020-10-14 08:57:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:57:04,403 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-10-14 08:57:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:57:04,470 INFO L225 Difference]: With dead ends: 19199 [2020-10-14 08:57:04,470 INFO L226 Difference]: Without dead ends: 12797 [2020-10-14 08:57:04,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:57:04,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12797 states. [2020-10-14 08:57:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12797 to 12795. [2020-10-14 08:57:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12795 states. [2020-10-14 08:57:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12795 states to 12795 states and 19578 transitions. [2020-10-14 08:57:05,218 INFO L78 Accepts]: Start accepts. Automaton has 12795 states and 19578 transitions. Word has length 97 [2020-10-14 08:57:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:57:05,218 INFO L479 AbstractCegarLoop]: Abstraction has 12795 states and 19578 transitions. [2020-10-14 08:57:05,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:57:05,219 INFO L276 IsEmpty]: Start isEmpty. Operand 12795 states and 19578 transitions. [2020-10-14 08:57:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 08:57:05,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:57:05,220 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] [2020-10-14 08:57:05,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:57:05,220 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:57:05,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:57:05,221 INFO L82 PathProgramCache]: Analyzing trace with hash -660128933, now seen corresponding path program 1 times [2020-10-14 08:57:05,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:57:05,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281903034] [2020-10-14 08:57:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:57:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:05,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:05,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:05,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:05,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:05,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:06,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:06,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:10,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:10,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 08:57:10,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:57:10,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:57:10,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:10,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:10,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:57:10,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:57:10,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 08:57:10,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:10,487 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 08:57:10,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:57:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:10,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:10,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:10,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:57:10,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:57:10,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-14 08:57:10,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:10,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:10,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:57:10,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:57:10,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:57:10,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:10,540 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 08:57:10,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281903034] [2020-10-14 08:57:10,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:57:10,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:57:10,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166213199] [2020-10-14 08:57:10,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:57:10,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:57:10,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:57:10,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:57:10,542 INFO L87 Difference]: Start difference. First operand 12795 states and 19578 transitions. Second operand 6 states. [2020-10-14 08:57:10,786 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-14 08:57:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:57:12,226 INFO L93 Difference]: Finished difference Result 38143 states and 58364 transitions. [2020-10-14 08:57:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:57:12,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-10-14 08:57:12,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:57:12,291 INFO L225 Difference]: With dead ends: 38143 [2020-10-14 08:57:12,292 INFO L226 Difference]: Without dead ends: 25405 [2020-10-14 08:57:12,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:57:12,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25405 states. [2020-10-14 08:57:14,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25405 to 25403. [2020-10-14 08:57:14,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25403 states. [2020-10-14 08:57:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25403 states to 25403 states and 38714 transitions. [2020-10-14 08:57:14,475 INFO L78 Accepts]: Start accepts. Automaton has 25403 states and 38714 transitions. Word has length 97 [2020-10-14 08:57:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:57:14,475 INFO L479 AbstractCegarLoop]: Abstraction has 25403 states and 38714 transitions. [2020-10-14 08:57:14,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:57:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 25403 states and 38714 transitions. [2020-10-14 08:57:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 08:57:14,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:57:14,476 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] [2020-10-14 08:57:14,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:57:14,476 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:57:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:57:14,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2124200490, now seen corresponding path program 1 times [2020-10-14 08:57:14,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:57:14,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008999410] [2020-10-14 08:57:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:57:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:14,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:14,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:14,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:14,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:18,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:18,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 08:57:18,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:57:18,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4416 [2020-10-14 08:57:18,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:18,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:18,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:57:18,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:57:18,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 08:57:18,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:19,150 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 08:57:19,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:57:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:19,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:19,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:19,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:57:19,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:57:19,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:57:19,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:19,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:19,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:57:19,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:57:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:57:19,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:19,186 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 08:57:19,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008999410] [2020-10-14 08:57:19,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:57:19,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:57:19,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709718548] [2020-10-14 08:57:19,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:57:19,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:57:19,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:57:19,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:57:19,188 INFO L87 Difference]: Start difference. First operand 25403 states and 38714 transitions. Second operand 6 states. [2020-10-14 08:57:19,404 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-14 08:57:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:57:21,504 INFO L93 Difference]: Finished difference Result 75839 states and 115516 transitions. [2020-10-14 08:57:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:57:21,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-10-14 08:57:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:57:21,616 INFO L225 Difference]: With dead ends: 75839 [2020-10-14 08:57:21,616 INFO L226 Difference]: Without dead ends: 50493 [2020-10-14 08:57:21,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:57:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50493 states. [2020-10-14 08:57:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50493 to 50491. [2020-10-14 08:57:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50491 states. [2020-10-14 08:57:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50491 states to 50491 states and 76602 transitions. [2020-10-14 08:57:23,948 INFO L78 Accepts]: Start accepts. Automaton has 50491 states and 76602 transitions. Word has length 97 [2020-10-14 08:57:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:57:23,948 INFO L479 AbstractCegarLoop]: Abstraction has 50491 states and 76602 transitions. [2020-10-14 08:57:23,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:57:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 50491 states and 76602 transitions. [2020-10-14 08:57:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 08:57:23,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:57:23,949 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] [2020-10-14 08:57:23,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:57:23,949 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:57:23,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:57:23,950 INFO L82 PathProgramCache]: Analyzing trace with hash -402869615, now seen corresponding path program 1 times [2020-10-14 08:57:23,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:57:23,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331122321] [2020-10-14 08:57:23,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:57:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:23,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:24,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:25,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:25,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 08:57:25,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 08:57:25,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2013 [2020-10-14 08:57:25,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:25,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:25,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:57:25,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:57:25,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 08:57:25,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:26,212 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 08:57:26,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:57:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:26,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:26,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:26,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:57:26,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:57:26,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:57:26,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:26,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:26,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:57:26,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:57:26,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:57:26,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:26,247 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 08:57:26,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331122321] [2020-10-14 08:57:26,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:57:26,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:57:26,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377216090] [2020-10-14 08:57:26,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:57:26,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:57:26,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:57:26,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:57:26,249 INFO L87 Difference]: Start difference. First operand 50491 states and 76602 transitions. Second operand 6 states. [2020-10-14 08:57:26,497 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-14 08:57:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:57:30,575 INFO L93 Difference]: Finished difference Result 151359 states and 229692 transitions. [2020-10-14 08:57:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:57:30,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-10-14 08:57:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:57:30,849 INFO L225 Difference]: With dead ends: 151359 [2020-10-14 08:57:30,849 INFO L226 Difference]: Without dead ends: 100925 [2020-10-14 08:57:30,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:57:31,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100925 states. [2020-10-14 08:57:37,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100925 to 100923. [2020-10-14 08:57:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100923 states. [2020-10-14 08:57:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100923 states to 100923 states and 152634 transitions. [2020-10-14 08:57:37,390 INFO L78 Accepts]: Start accepts. Automaton has 100923 states and 152634 transitions. Word has length 97 [2020-10-14 08:57:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:57:37,390 INFO L479 AbstractCegarLoop]: Abstraction has 100923 states and 152634 transitions. [2020-10-14 08:57:37,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:57:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 100923 states and 152634 transitions. [2020-10-14 08:57:37,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 08:57:37,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:57:37,391 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] [2020-10-14 08:57:37,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:57:37,391 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:57:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:57:37,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1132528310, now seen corresponding path program 1 times [2020-10-14 08:57:37,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:57:37,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824160177] [2020-10-14 08:57:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:57:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:37,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:37,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:37,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 08:57:37,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:57:37,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-14 08:57:37,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:37,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:37,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 08:57:37,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:57:37,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 08:57:37,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:37,959 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 08:57:37,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:57:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:37,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:37,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:37,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:57:37,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:57:37,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:57:37,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:37,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:37,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:57:37,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:57:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:57:37,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:37,991 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 08:57:37,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824160177] [2020-10-14 08:57:37,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:57:37,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-14 08:57:37,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317319299] [2020-10-14 08:57:37,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 08:57:37,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:57:37,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 08:57:37,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:57:37,995 INFO L87 Difference]: Start difference. First operand 100923 states and 152634 transitions. Second operand 10 states. [2020-10-14 08:57:38,293 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-14 08:58:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:58:55,661 INFO L93 Difference]: Finished difference Result 1513047 states and 2288712 transitions. [2020-10-14 08:58:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 08:58:55,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-10-14 08:58:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:58:58,035 INFO L225 Difference]: With dead ends: 1513047 [2020-10-14 08:58:58,035 INFO L226 Difference]: Without dead ends: 1412181 [2020-10-14 08:58:58,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-14 08:58:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412181 states.