/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-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:09:27,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:09:27,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:09:27,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:09:27,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:09:27,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:09:27,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:09:27,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:09:27,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:09:27,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:09:27,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:09:27,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:09:27,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:09:27,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:09:27,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:09:27,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:09:27,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:09:27,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:09:27,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:09:27,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:09:27,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:09:27,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:09:27,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:09:27,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:09:27,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:09:27,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:09:27,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:09:27,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:09:27,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:09:27,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:09:27,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:09:27,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:09:27,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:09:27,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:09:27,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:09:27,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:09:27,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:09:27,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:09:27,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:09:27,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:09:27,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:09:27,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 09:09:27,715 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:09:27,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:09:27,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:09:27,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:09:27,716 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:09:27,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:09:27,717 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:09:27,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:09:27,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:09:27,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:09:27,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:09:27,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:09:27,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:09:27,718 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:09:27,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:09:27,719 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:09:27,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:09:27,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:09:27,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:09:27,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:09:27,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:09:27,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:09:27,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:09:27,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:09:27,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:09:27,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:09:27,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:09:27,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:09:27,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:09:27,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:09:28,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:09:28,062 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:09:28,065 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:09:28,067 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:09:28,067 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:09:28,068 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:09:28,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37adb6a48/8d7edba8d8d24e4e8a6efe9a20945ee3/FLAG6016f9473 [2020-10-14 09:09:28,557 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:09:28,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:09:28,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37adb6a48/8d7edba8d8d24e4e8a6efe9a20945ee3/FLAG6016f9473 [2020-10-14 09:09:28,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37adb6a48/8d7edba8d8d24e4e8a6efe9a20945ee3 [2020-10-14 09:09:28,988 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:09:28,990 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:09:28,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:09:28,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:09:28,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:09:28,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:09:28" (1/1) ... [2020-10-14 09:09:28,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c1be1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:09:28, skipping insertion in model container [2020-10-14 09:09:28,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:09:28" (1/1) ... [2020-10-14 09:09:29,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:09:29,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:09:29,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:09:29,309 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:09:29,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:09:29,572 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:09:29,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:09:29 WrapperNode [2020-10-14 09:09:29,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:09:29,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:09:29,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:09:29,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:09:29,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:09:29" (1/1) ... [2020-10-14 09:09:29,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:09:29" (1/1) ... [2020-10-14 09:09:29,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:09:29" (1/1) ... [2020-10-14 09:09:29,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:09:29" (1/1) ... [2020-10-14 09:09:29,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:09:29" (1/1) ... [2020-10-14 09:09:29,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:09:29" (1/1) ... [2020-10-14 09:09:29,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:09:29" (1/1) ... [2020-10-14 09:09:29,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:09:29,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:09:29,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:09:29,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:09:29,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:09:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:09:29,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:09:29,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:09:29,694 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:09:29,694 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:09:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:09:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:09:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:09:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 09:09:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:09:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:09:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:09:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:09:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:09:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:09:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:09:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:09:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:09:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:09:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:09:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:09:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:09:29,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:09:30,342 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:09:30,342 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:09:30,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:09:30 BoogieIcfgContainer [2020-10-14 09:09:30,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:09:30,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:09:30,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:09:30,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:09:30,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:09:28" (1/3) ... [2020-10-14 09:09:30,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673b4b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:09:30, skipping insertion in model container [2020-10-14 09:09:30,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:09:29" (2/3) ... [2020-10-14 09:09:30,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673b4b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:09:30, skipping insertion in model container [2020-10-14 09:09:30,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:09:30" (3/3) ... [2020-10-14 09:09:30,356 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:09:30,367 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:09:30,374 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:09:30,389 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:09:30,410 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:09:30,410 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:09:30,410 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:09:30,411 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:09:30,411 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:09:30,411 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:09:30,411 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:09:30,412 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:09:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2020-10-14 09:09:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 09:09:30,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:30,444 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] [2020-10-14 09:09:30,445 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:30,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:30,451 INFO L82 PathProgramCache]: Analyzing trace with hash 755670559, now seen corresponding path program 1 times [2020-10-14 09:09:30,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:30,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221930217] [2020-10-14 09:09:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:30,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:31,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:31,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:31,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:32,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:32,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 09:09:32,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:09:32,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2067 [2020-10-14 09:09:32,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:32,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:09:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 09:09:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 09:09:32,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:09:33,117 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:09:33,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:33,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:33,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:33,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:33,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:33,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 09:09:33,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:33,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:33,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:33,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:33,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:33,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:33,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221930217] [2020-10-14 09:09:33,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:33,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:09:33,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096001498] [2020-10-14 09:09:33,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:09:33,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:33,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:09:33,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:09:33,234 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 4 states. [2020-10-14 09:09:33,447 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:09:34,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:34,179 INFO L93 Difference]: Finished difference Result 273 states and 432 transitions. [2020-10-14 09:09:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:09:34,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-14 09:09:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:34,195 INFO L225 Difference]: With dead ends: 273 [2020-10-14 09:09:34,195 INFO L226 Difference]: Without dead ends: 179 [2020-10-14 09:09:34,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:34,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-14 09:09:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-14 09:09:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-14 09:09:34,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 263 transitions. [2020-10-14 09:09:34,260 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 263 transitions. Word has length 53 [2020-10-14 09:09:34,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:34,261 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 263 transitions. [2020-10-14 09:09:34,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:09:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 263 transitions. [2020-10-14 09:09:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 09:09:34,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:34,263 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] [2020-10-14 09:09:34,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:09:34,264 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:34,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:34,265 INFO L82 PathProgramCache]: Analyzing trace with hash -261857778, now seen corresponding path program 1 times [2020-10-14 09:09:34,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:34,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822578906] [2020-10-14 09:09:34,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:34,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:34,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:34,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:35,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:35,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 09:09:35,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:09:35,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 760 [2020-10-14 09:09:35,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:35,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:35,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:09:35,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:09:35,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 09:09:35,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:35,228 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:09:35,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:35,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:35,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:35,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:35,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:35,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:09:35,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:35,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:35,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:35,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:35,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:35,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:35,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822578906] [2020-10-14 09:09:35,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:35,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:09:35,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897504202] [2020-10-14 09:09:35,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:09:35,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:35,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:09:35,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:09:35,263 INFO L87 Difference]: Start difference. First operand 177 states and 263 transitions. Second operand 4 states. [2020-10-14 09:09:35,420 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:09:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:35,850 INFO L93 Difference]: Finished difference Result 437 states and 675 transitions. [2020-10-14 09:09:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:09:35,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-14 09:09:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:35,854 INFO L225 Difference]: With dead ends: 437 [2020-10-14 09:09:35,854 INFO L226 Difference]: Without dead ends: 291 [2020-10-14 09:09:35,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:35,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-14 09:09:35,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2020-10-14 09:09:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-14 09:09:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 440 transitions. [2020-10-14 09:09:35,903 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 440 transitions. Word has length 54 [2020-10-14 09:09:35,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:35,904 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 440 transitions. [2020-10-14 09:09:35,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:09:35,904 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 440 transitions. [2020-10-14 09:09:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 09:09:35,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:35,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:35,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:09:35,914 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:35,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1124194663, now seen corresponding path program 1 times [2020-10-14 09:09:35,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:35,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677952649] [2020-10-14 09:09:35,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:35,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:36,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:36,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:36,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 09:09:36,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:09:36,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-14 09:09:36,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:36,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:36,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:09:36,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 09:09:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 09:09:36,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:36,486 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:09:36,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:36,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:36,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:36,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:36,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:36,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:09:36,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:36,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:36,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:36,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677952649] [2020-10-14 09:09:36,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:36,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:09:36,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034791651] [2020-10-14 09:09:36,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:09:36,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:36,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:09:36,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:09:36,522 INFO L87 Difference]: Start difference. First operand 289 states and 440 transitions. Second operand 4 states. [2020-10-14 09:09:36,653 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:09:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:37,152 INFO L93 Difference]: Finished difference Result 741 states and 1154 transitions. [2020-10-14 09:09:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:09:37,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-14 09:09:37,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:37,156 INFO L225 Difference]: With dead ends: 741 [2020-10-14 09:09:37,156 INFO L226 Difference]: Without dead ends: 483 [2020-10-14 09:09:37,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-10-14 09:09:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 481. [2020-10-14 09:09:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-14 09:09:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 740 transitions. [2020-10-14 09:09:37,191 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 740 transitions. Word has length 55 [2020-10-14 09:09:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:37,192 INFO L479 AbstractCegarLoop]: Abstraction has 481 states and 740 transitions. [2020-10-14 09:09:37,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:09:37,192 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 740 transitions. [2020-10-14 09:09:37,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 09:09:37,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:37,194 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] [2020-10-14 09:09:37,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:09:37,194 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:37,195 INFO L82 PathProgramCache]: Analyzing trace with hash 470821239, now seen corresponding path program 1 times [2020-10-14 09:09:37,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:37,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609806555] [2020-10-14 09:09:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:37,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:37,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:38,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:38,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 09:09:38,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:09:38,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1039 [2020-10-14 09:09:38,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:38,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:38,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:09:38,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:09:38,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 09:09:38,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:38,495 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:09:38,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:38,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:38,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:38,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:38,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:38,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:09:38,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:38,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:38,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:38,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:38,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:38,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:09:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:38,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609806555] [2020-10-14 09:09:38,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:38,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 09:09:38,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312216013] [2020-10-14 09:09:38,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:09:38,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:38,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:09:38,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:09:38,572 INFO L87 Difference]: Start difference. First operand 481 states and 740 transitions. Second operand 7 states. [2020-10-14 09:09:38,767 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-14 09:09:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:39,366 INFO L93 Difference]: Finished difference Result 2731 states and 4285 transitions. [2020-10-14 09:09:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 09:09:39,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-14 09:09:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:39,384 INFO L225 Difference]: With dead ends: 2731 [2020-10-14 09:09:39,385 INFO L226 Difference]: Without dead ends: 2281 [2020-10-14 09:09:39,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:09:39,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2020-10-14 09:09:39,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 929. [2020-10-14 09:09:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 929 states. [2020-10-14 09:09:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1432 transitions. [2020-10-14 09:09:39,490 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1432 transitions. Word has length 56 [2020-10-14 09:09:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:39,491 INFO L479 AbstractCegarLoop]: Abstraction has 929 states and 1432 transitions. [2020-10-14 09:09:39,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:09:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1432 transitions. [2020-10-14 09:09:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 09:09:39,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:39,492 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] [2020-10-14 09:09:39,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:09:39,493 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:39,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:39,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1692023771, now seen corresponding path program 1 times [2020-10-14 09:09:39,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:39,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517854698] [2020-10-14 09:09:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:39,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:39,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:40,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:40,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 09:09:40,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:09:40,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-14 09:09:40,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:40,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:40,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:09:40,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-14 09:09:40,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:09:40,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:40,211 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:09:40,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:40,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:40,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:40,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:40,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:40,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:09:40,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:40,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:40,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:40,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:40,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:40,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:40,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517854698] [2020-10-14 09:09:40,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:40,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:09:40,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800874596] [2020-10-14 09:09:40,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:09:40,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:40,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:09:40,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:40,238 INFO L87 Difference]: Start difference. First operand 929 states and 1432 transitions. Second operand 5 states. [2020-10-14 09:09:40,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:40,996 INFO L93 Difference]: Finished difference Result 1859 states and 2865 transitions. [2020-10-14 09:09:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:09:40,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-14 09:09:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:41,008 INFO L225 Difference]: With dead ends: 1859 [2020-10-14 09:09:41,008 INFO L226 Difference]: Without dead ends: 1857 [2020-10-14 09:09:41,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:09:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2020-10-14 09:09:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 961. [2020-10-14 09:09:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-10-14 09:09:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1464 transitions. [2020-10-14 09:09:41,101 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1464 transitions. Word has length 57 [2020-10-14 09:09:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:41,101 INFO L479 AbstractCegarLoop]: Abstraction has 961 states and 1464 transitions. [2020-10-14 09:09:41,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:09:41,102 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1464 transitions. [2020-10-14 09:09:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 09:09:41,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:41,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:41,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:09:41,104 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:41,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:41,104 INFO L82 PathProgramCache]: Analyzing trace with hash 922749094, now seen corresponding path program 1 times [2020-10-14 09:09:41,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:41,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792588254] [2020-10-14 09:09:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:41,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:41,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:41,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:41,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 09:09:41,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:09:41,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-14 09:09:41,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:41,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:41,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:09:41,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:09:41,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 09:09:41,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:41,711 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:09:41,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:41,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:41,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:41,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:41,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:41,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:09:41,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:41,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:41,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:41,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:41,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:41,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:41,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792588254] [2020-10-14 09:09:41,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:41,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:09:41,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925708304] [2020-10-14 09:09:41,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:09:41,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:41,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:09:41,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:09:41,742 INFO L87 Difference]: Start difference. First operand 961 states and 1464 transitions. Second operand 4 states. [2020-10-14 09:09:41,868 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:09:42,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:42,442 INFO L93 Difference]: Finished difference Result 2709 states and 4138 transitions. [2020-10-14 09:09:42,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:09:42,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-14 09:09:42,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:42,453 INFO L225 Difference]: With dead ends: 2709 [2020-10-14 09:09:42,453 INFO L226 Difference]: Without dead ends: 1779 [2020-10-14 09:09:42,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2020-10-14 09:09:42,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1761. [2020-10-14 09:09:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-10-14 09:09:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2656 transitions. [2020-10-14 09:09:42,648 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2656 transitions. Word has length 58 [2020-10-14 09:09:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:42,649 INFO L479 AbstractCegarLoop]: Abstraction has 1761 states and 2656 transitions. [2020-10-14 09:09:42,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:09:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2656 transitions. [2020-10-14 09:09:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 09:09:42,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:42,651 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] [2020-10-14 09:09:42,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:09:42,652 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:42,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:42,652 INFO L82 PathProgramCache]: Analyzing trace with hash 5673895, now seen corresponding path program 1 times [2020-10-14 09:09:42,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:42,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978177943] [2020-10-14 09:09:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:42,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:42,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:42,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:42,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 09:09:42,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:09:42,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-14 09:09:42,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:42,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:42,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:09:42,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:09:42,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:09:42,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:43,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:43,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:43,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:43,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:43,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:43,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:09:43,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:43,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:43,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:43,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:43,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:43,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:43,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978177943] [2020-10-14 09:09:43,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:43,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:09:43,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178004933] [2020-10-14 09:09:43,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:09:43,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:09:43,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:09:43,046 INFO L87 Difference]: Start difference. First operand 1761 states and 2656 transitions. Second operand 4 states. [2020-10-14 09:09:43,168 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:09:43,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:43,970 INFO L93 Difference]: Finished difference Result 3336 states and 5062 transitions. [2020-10-14 09:09:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:09:43,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-14 09:09:43,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:43,990 INFO L225 Difference]: With dead ends: 3336 [2020-10-14 09:09:43,991 INFO L226 Difference]: Without dead ends: 2405 [2020-10-14 09:09:43,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:43,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2020-10-14 09:09:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2403. [2020-10-14 09:09:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2403 states. [2020-10-14 09:09:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 3610 transitions. [2020-10-14 09:09:44,260 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 3610 transitions. Word has length 59 [2020-10-14 09:09:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:44,261 INFO L479 AbstractCegarLoop]: Abstraction has 2403 states and 3610 transitions. [2020-10-14 09:09:44,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:09:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 3610 transitions. [2020-10-14 09:09:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 09:09:44,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:44,264 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:44,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:09:44,264 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:44,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1870143215, now seen corresponding path program 1 times [2020-10-14 09:09:44,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:44,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137186717] [2020-10-14 09:09:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:44,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:44,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:44,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:44,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 09:09:44,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:09:44,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-14 09:09:44,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:44,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:44,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:09:44,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:09:44,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 09:09:44,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:45,127 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:09:45,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:45,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:45,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:45,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:45,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:45,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 09:09:45,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:45,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:45,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:45,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:45,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:45,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:09:45,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137186717] [2020-10-14 09:09:45,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:09:45,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 09:09:45,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299381250] [2020-10-14 09:09:45,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:09:45,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:45,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:09:45,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:45,183 INFO L87 Difference]: Start difference. First operand 2403 states and 3610 transitions. Second operand 5 states. [2020-10-14 09:09:45,328 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:09:46,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:46,481 INFO L93 Difference]: Finished difference Result 5497 states and 8301 transitions. [2020-10-14 09:09:46,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:09:46,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-10-14 09:09:46,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:46,506 INFO L225 Difference]: With dead ends: 5497 [2020-10-14 09:09:46,507 INFO L226 Difference]: Without dead ends: 3927 [2020-10-14 09:09:46,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:09:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3927 states. [2020-10-14 09:09:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3927 to 3907. [2020-10-14 09:09:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3907 states. [2020-10-14 09:09:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 5850 transitions. [2020-10-14 09:09:46,840 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 5850 transitions. Word has length 81 [2020-10-14 09:09:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:46,841 INFO L479 AbstractCegarLoop]: Abstraction has 3907 states and 5850 transitions. [2020-10-14 09:09:46,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:09:46,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 5850 transitions. [2020-10-14 09:09:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 09:09:46,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:46,849 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:46,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:09:46,849 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:46,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:46,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1252882277, now seen corresponding path program 1 times [2020-10-14 09:09:46,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:46,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090486154] [2020-10-14 09:09:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:46,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:46,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:47,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:47,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:47,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:49,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:51,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:51,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 09:09:51,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:09:51,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 09:09:51,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:51,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:09:51,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 09:09:51,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 09:09:51,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:52,041 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:09:52,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:52,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:52,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:52,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:52,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:52,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:09:52,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:52,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:52,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:52,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:52,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:52,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:52,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090486154] [2020-10-14 09:09:52,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:52,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:09:52,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120606547] [2020-10-14 09:09:52,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:09:52,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:52,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:09:52,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:09:52,074 INFO L87 Difference]: Start difference. First operand 3907 states and 5850 transitions. Second operand 4 states. [2020-10-14 09:09:53,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:53,218 INFO L93 Difference]: Finished difference Result 11215 states and 16764 transitions. [2020-10-14 09:09:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:09:53,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 09:09:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:53,256 INFO L225 Difference]: With dead ends: 11215 [2020-10-14 09:09:53,256 INFO L226 Difference]: Without dead ends: 7341 [2020-10-14 09:09:53,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7341 states. [2020-10-14 09:09:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7341 to 7339. [2020-10-14 09:09:53,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7339 states. [2020-10-14 09:09:53,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7339 states to 7339 states and 10866 transitions. [2020-10-14 09:09:53,807 INFO L78 Accepts]: Start accepts. Automaton has 7339 states and 10866 transitions. Word has length 81 [2020-10-14 09:09:53,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:53,808 INFO L479 AbstractCegarLoop]: Abstraction has 7339 states and 10866 transitions. [2020-10-14 09:09:53,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:09:53,808 INFO L276 IsEmpty]: Start isEmpty. Operand 7339 states and 10866 transitions. [2020-10-14 09:09:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 09:09:53,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:53,820 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:53,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:09:53,821 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:53,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:53,821 INFO L82 PathProgramCache]: Analyzing trace with hash -225568572, now seen corresponding path program 1 times [2020-10-14 09:09:53,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:53,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690936373] [2020-10-14 09:09:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:53,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:53,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:53,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:54,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:54,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:54,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:55,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:58,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:58,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 09:09:58,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:09:58,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:09:58,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:58,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:58,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:09:58,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:09:58,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 09:09:58,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:58,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:58,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:58,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:58,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:58,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:58,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:09:58,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:58,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:58,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:58,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:58,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:58,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:09:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:59,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690936373] [2020-10-14 09:09:59,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:59,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:09:59,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090308199] [2020-10-14 09:09:59,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:09:59,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:59,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:09:59,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:09:59,007 INFO L87 Difference]: Start difference. First operand 7339 states and 10866 transitions. Second operand 4 states. [2020-10-14 09:09:59,130 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:10:00,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:10:00,413 INFO L93 Difference]: Finished difference Result 21071 states and 31092 transitions. [2020-10-14 09:10:00,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:10:00,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 09:10:00,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:10:00,464 INFO L225 Difference]: With dead ends: 21071 [2020-10-14 09:10:00,464 INFO L226 Difference]: Without dead ends: 13765 [2020-10-14 09:10:00,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:10:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13765 states. [2020-10-14 09:10:01,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13765 to 13763. [2020-10-14 09:10:01,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13763 states. [2020-10-14 09:10:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13763 states to 13763 states and 20098 transitions. [2020-10-14 09:10:01,649 INFO L78 Accepts]: Start accepts. Automaton has 13763 states and 20098 transitions. Word has length 81 [2020-10-14 09:10:01,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:10:01,650 INFO L479 AbstractCegarLoop]: Abstraction has 13763 states and 20098 transitions. [2020-10-14 09:10:01,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:10:01,650 INFO L276 IsEmpty]: Start isEmpty. Operand 13763 states and 20098 transitions. [2020-10-14 09:10:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 09:10:01,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:10:01,656 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:10:01,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:10:01,657 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:10:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:10:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash -712404403, now seen corresponding path program 1 times [2020-10-14 09:10:01,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:10:01,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764561743] [2020-10-14 09:10:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:10:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:01,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:01,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:01,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:01,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:01,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:02,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:02,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:06,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:06,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 09:10:06,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:10:06,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 09:10:06,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:06,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:06,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:10:06,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 09:10:06,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 09:10:06,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:10:06,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:10:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:06,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:06,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:06,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:10:06,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:10:06,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:10:06,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:06,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:06,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:10:06,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:10:06,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:10:06,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:10:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:10:06,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764561743] [2020-10-14 09:10:06,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:10:06,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:10:06,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274710026] [2020-10-14 09:10:06,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:10:06,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:10:06,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:10:06,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:10:06,862 INFO L87 Difference]: Start difference. First operand 13763 states and 20098 transitions. Second operand 4 states. [2020-10-14 09:10:07,058 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:10:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:10:09,365 INFO L93 Difference]: Finished difference Result 39463 states and 57348 transitions. [2020-10-14 09:10:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:10:09,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 09:10:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:10:09,429 INFO L225 Difference]: With dead ends: 39463 [2020-10-14 09:10:09,429 INFO L226 Difference]: Without dead ends: 25733 [2020-10-14 09:10:09,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:10:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25733 states. [2020-10-14 09:10:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25733 to 25731. [2020-10-14 09:10:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25731 states. [2020-10-14 09:10:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25731 states to 25731 states and 36962 transitions. [2020-10-14 09:10:11,517 INFO L78 Accepts]: Start accepts. Automaton has 25731 states and 36962 transitions. Word has length 81 [2020-10-14 09:10:11,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:10:11,518 INFO L479 AbstractCegarLoop]: Abstraction has 25731 states and 36962 transitions. [2020-10-14 09:10:11,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:10:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 25731 states and 36962 transitions. [2020-10-14 09:10:11,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 09:10:11,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:10:11,526 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:10:11,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:10:11,527 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:10:11,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:10:11,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2007432621, now seen corresponding path program 1 times [2020-10-14 09:10:11,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:10:11,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852221043] [2020-10-14 09:10:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:10:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:11,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:11,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:11,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:11,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:12,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:13,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:13,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 09:10:13,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:10:13,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2422 [2020-10-14 09:10:13,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:13,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:13,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:10:13,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 09:10:13,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 09:10:13,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:10:14,117 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:10:14,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:10:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:14,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:14,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:14,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:10:14,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:10:14,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:10:14,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:14,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:14,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:10:14,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:10:14,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:10:14,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:10:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:10:14,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852221043] [2020-10-14 09:10:14,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:10:14,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:10:14,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039211438] [2020-10-14 09:10:14,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:10:14,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:10:14,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:10:14,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:10:14,166 INFO L87 Difference]: Start difference. First operand 25731 states and 36962 transitions. Second operand 4 states. [2020-10-14 09:10:14,292 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:10:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:10:16,571 INFO L93 Difference]: Finished difference Result 73159 states and 104420 transitions. [2020-10-14 09:10:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:10:16,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-14 09:10:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:10:16,695 INFO L225 Difference]: With dead ends: 73159 [2020-10-14 09:10:16,695 INFO L226 Difference]: Without dead ends: 47461 [2020-10-14 09:10:16,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:10:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47461 states. [2020-10-14 09:10:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47461 to 47459. [2020-10-14 09:10:19,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47459 states. [2020-10-14 09:10:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47459 states to 47459 states and 66850 transitions. [2020-10-14 09:10:19,200 INFO L78 Accepts]: Start accepts. Automaton has 47459 states and 66850 transitions. Word has length 82 [2020-10-14 09:10:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:10:19,200 INFO L479 AbstractCegarLoop]: Abstraction has 47459 states and 66850 transitions. [2020-10-14 09:10:19,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:10:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 47459 states and 66850 transitions. [2020-10-14 09:10:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 09:10:19,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:10:19,213 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:10:19,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:10:19,213 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:10:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:10:19,214 INFO L82 PathProgramCache]: Analyzing trace with hash -221173842, now seen corresponding path program 1 times [2020-10-14 09:10:19,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:10:19,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390303968] [2020-10-14 09:10:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:10:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:19,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:19,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:19,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:19,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:19,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:20,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:21,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:21,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 09:10:21,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:10:21,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2641 [2020-10-14 09:10:21,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:21,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:21,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:10:21,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 09:10:21,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 09:10:21,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:10:22,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:10:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:22,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:22,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:22,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:10:22,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:10:22,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:10:22,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:22,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:22,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:10:22,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:10:22,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:10:22,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:10:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:10:22,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390303968] [2020-10-14 09:10:22,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:10:22,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:10:22,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801385952] [2020-10-14 09:10:22,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:10:22,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:10:22,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:10:22,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:10:22,051 INFO L87 Difference]: Start difference. First operand 47459 states and 66850 transitions. Second operand 4 states. [2020-10-14 09:10:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:10:24,169 INFO L93 Difference]: Finished difference Result 81001 states and 114171 transitions. [2020-10-14 09:10:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:10:24,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-14 09:10:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:10:24,231 INFO L225 Difference]: With dead ends: 81001 [2020-10-14 09:10:24,232 INFO L226 Difference]: Without dead ends: 33575 [2020-10-14 09:10:24,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:10:24,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33575 states. [2020-10-14 09:10:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33575 to 33573. [2020-10-14 09:10:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33573 states. [2020-10-14 09:10:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33573 states to 33573 states and 46825 transitions. [2020-10-14 09:10:27,167 INFO L78 Accepts]: Start accepts. Automaton has 33573 states and 46825 transitions. Word has length 83 [2020-10-14 09:10:27,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:10:27,168 INFO L479 AbstractCegarLoop]: Abstraction has 33573 states and 46825 transitions. [2020-10-14 09:10:27,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:10:27,168 INFO L276 IsEmpty]: Start isEmpty. Operand 33573 states and 46825 transitions. [2020-10-14 09:10:27,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 09:10:27,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:10:27,175 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:10:27,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:10:27,176 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:10:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:10:27,176 INFO L82 PathProgramCache]: Analyzing trace with hash -175371370, now seen corresponding path program 1 times [2020-10-14 09:10:27,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:10:27,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389487811] [2020-10-14 09:10:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:10:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:27,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:27,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:27,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:27,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:27,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:28,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:28,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 09:10:28,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:10:28,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1325 [2020-10-14 09:10:28,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:28,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:28,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:10:28,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 09:10:28,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 09:10:28,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:10:28,682 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:10:28,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:10:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:28,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:28,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:28,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:10:28,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:10:28,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:10:28,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:28,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:28,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:10:28,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:10:28,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:10:28,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:10:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:10:28,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389487811] [2020-10-14 09:10:28,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:10:28,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:10:28,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086348687] [2020-10-14 09:10:28,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:10:28,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:10:28,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:10:28,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:10:28,716 INFO L87 Difference]: Start difference. First operand 33573 states and 46825 transitions. Second operand 7 states. [2020-10-14 09:10:28,889 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:10:33,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:10:33,780 INFO L93 Difference]: Finished difference Result 117345 states and 166219 transitions. [2020-10-14 09:10:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:10:33,780 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-14 09:10:33,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:10:33,941 INFO L225 Difference]: With dead ends: 117345 [2020-10-14 09:10:33,941 INFO L226 Difference]: Without dead ends: 102527 [2020-10-14 09:10:33,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:10:34,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102527 states. [2020-10-14 09:10:37,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102527 to 53116. [2020-10-14 09:10:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53116 states. [2020-10-14 09:10:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53116 states to 53116 states and 74045 transitions. [2020-10-14 09:10:37,362 INFO L78 Accepts]: Start accepts. Automaton has 53116 states and 74045 transitions. Word has length 84 [2020-10-14 09:10:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:10:37,363 INFO L479 AbstractCegarLoop]: Abstraction has 53116 states and 74045 transitions. [2020-10-14 09:10:37,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:10:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 53116 states and 74045 transitions. [2020-10-14 09:10:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 09:10:37,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:10:37,370 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:10:37,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:10:37,371 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:10:37,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:10:37,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1632818759, now seen corresponding path program 1 times [2020-10-14 09:10:37,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:10:37,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075711250] [2020-10-14 09:10:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:10:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:37,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:37,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:37,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:37,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:37,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:38,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:38,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 09:10:38,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:10:38,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-14 09:10:38,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:38,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:38,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:10:38,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:10:38,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 09:10:38,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:10:38,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:10:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:38,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:38,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:38,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:10:38,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:10:38,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:10:38,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:38,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:38,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:10:38,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:10:38,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:10:38,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:10:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 09:10:38,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075711250] [2020-10-14 09:10:38,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:10:38,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:10:38,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230450940] [2020-10-14 09:10:38,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:10:38,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:10:38,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:10:38,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:10:38,766 INFO L87 Difference]: Start difference. First operand 53116 states and 74045 transitions. Second operand 7 states. [2020-10-14 09:10:38,929 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:10:45,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:10:45,912 INFO L93 Difference]: Finished difference Result 135161 states and 189840 transitions. [2020-10-14 09:10:45,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:10:45,913 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-14 09:10:45,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:10:46,059 INFO L225 Difference]: With dead ends: 135161 [2020-10-14 09:10:46,059 INFO L226 Difference]: Without dead ends: 114023 [2020-10-14 09:10:46,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:10:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114023 states. [2020-10-14 09:10:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114023 to 60239. [2020-10-14 09:10:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60239 states. [2020-10-14 09:10:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60239 states to 60239 states and 83993 transitions. [2020-10-14 09:10:49,896 INFO L78 Accepts]: Start accepts. Automaton has 60239 states and 83993 transitions. Word has length 84 [2020-10-14 09:10:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:10:49,896 INFO L479 AbstractCegarLoop]: Abstraction has 60239 states and 83993 transitions. [2020-10-14 09:10:49,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:10:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 60239 states and 83993 transitions. [2020-10-14 09:10:49,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 09:10:49,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:10:49,902 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:10:49,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:10:49,902 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:10:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:10:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash -897487382, now seen corresponding path program 1 times [2020-10-14 09:10:49,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:10:49,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135140285] [2020-10-14 09:10:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:10:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:49,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:49,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:50,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:50,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:50,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:51,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:51,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 09:10:51,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:10:51,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1873 [2020-10-14 09:10:51,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:51,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:51,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:10:51,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:10:51,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 09:10:51,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:10:51,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:10:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:10:51,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:10:51,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:10:51,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:10:51,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:10:51,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:10:51,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:10:51,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:10:51,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:10:51,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:10:51,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:10:51,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:10:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 09:10:51,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135140285] [2020-10-14 09:10:51,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:10:51,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:10:51,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503657600] [2020-10-14 09:10:51,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:10:51,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:10:51,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:10:51,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:10:51,998 INFO L87 Difference]: Start difference. First operand 60239 states and 83993 transitions. Second operand 7 states. [2020-10-14 09:10:52,150 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:11:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:00,045 INFO L93 Difference]: Finished difference Result 141519 states and 198628 transitions. [2020-10-14 09:11:00,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:11:00,045 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-14 09:11:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:00,195 INFO L225 Difference]: With dead ends: 141519 [2020-10-14 09:11:00,196 INFO L226 Difference]: Without dead ends: 120613 [2020-10-14 09:11:00,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:11:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120613 states. [2020-10-14 09:11:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120613 to 67084. [2020-10-14 09:11:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67084 states. [2020-10-14 09:11:04,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67084 states to 67084 states and 93533 transitions. [2020-10-14 09:11:04,671 INFO L78 Accepts]: Start accepts. Automaton has 67084 states and 93533 transitions. Word has length 84 [2020-10-14 09:11:04,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:04,671 INFO L479 AbstractCegarLoop]: Abstraction has 67084 states and 93533 transitions. [2020-10-14 09:11:04,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:11:04,671 INFO L276 IsEmpty]: Start isEmpty. Operand 67084 states and 93533 transitions. [2020-10-14 09:11:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 09:11:04,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:04,677 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:11:04,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:11:04,678 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:04,678 INFO L82 PathProgramCache]: Analyzing trace with hash -851882335, now seen corresponding path program 1 times [2020-10-14 09:11:04,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:04,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656297181] [2020-10-14 09:11:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:04,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:04,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:04,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:04,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:05,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:05,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:05,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 09:11:05,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:11:05,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1263 [2020-10-14 09:11:05,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:05,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:05,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:11:05,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:11:05,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 09:11:05,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:11:06,104 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:11:06,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:06,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:06,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:06,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:06,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:06,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:11:06,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:06,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:06,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:11:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 09:11:06,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656297181] [2020-10-14 09:11:06,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:11:06,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:11:06,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042293948] [2020-10-14 09:11:06,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:11:06,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:06,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:11:06,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:11:06,134 INFO L87 Difference]: Start difference. First operand 67084 states and 93533 transitions. Second operand 7 states. [2020-10-14 09:11:06,290 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:11:14,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:14,871 INFO L93 Difference]: Finished difference Result 146315 states and 205236 transitions. [2020-10-14 09:11:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:11:14,872 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-14 09:11:14,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:15,010 INFO L225 Difference]: With dead ends: 146315 [2020-10-14 09:11:15,010 INFO L226 Difference]: Without dead ends: 125641 [2020-10-14 09:11:15,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:11:15,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125641 states. [2020-10-14 09:11:19,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125641 to 73582. [2020-10-14 09:11:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73582 states. [2020-10-14 09:11:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73582 states to 73582 states and 102557 transitions. [2020-10-14 09:11:19,726 INFO L78 Accepts]: Start accepts. Automaton has 73582 states and 102557 transitions. Word has length 84 [2020-10-14 09:11:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:19,726 INFO L479 AbstractCegarLoop]: Abstraction has 73582 states and 102557 transitions. [2020-10-14 09:11:19,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:11:19,726 INFO L276 IsEmpty]: Start isEmpty. Operand 73582 states and 102557 transitions. [2020-10-14 09:11:19,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-14 09:11:19,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:19,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:11:19,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:11:19,734 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:19,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:19,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2039870869, now seen corresponding path program 1 times [2020-10-14 09:11:19,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:19,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387364941] [2020-10-14 09:11:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:19,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:19,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:19,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:19,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:20,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:20,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:20,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:20,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:20,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:20,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:20,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:22,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:22,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:23,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:23,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:23,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:23,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:23,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:23,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:24,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:24,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:24,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 09:11:24,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 09:11:24,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:11:24,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:24,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:24,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:11:24,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:11:24,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 09:11:24,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:11:24,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:24,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:24,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:24,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:24,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:24,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:11:24,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:24,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:24,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:24,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:24,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:24,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:11:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:11:24,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387364941] [2020-10-14 09:11:24,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:11:24,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:11:24,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270256970] [2020-10-14 09:11:24,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:11:24,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:24,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:11:24,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:11:24,917 INFO L87 Difference]: Start difference. First operand 73582 states and 102557 transitions. Second operand 6 states. [2020-10-14 09:11:25,048 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-14 09:11:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:49,817 INFO L93 Difference]: Finished difference Result 403760 states and 561236 transitions. [2020-10-14 09:11:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:11:49,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2020-10-14 09:11:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:50,240 INFO L225 Difference]: With dead ends: 403760 [2020-10-14 09:11:50,240 INFO L226 Difference]: Without dead ends: 332037 [2020-10-14 09:11:50,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:11:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332037 states. [2020-10-14 09:12:10,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332037 to 256975. [2020-10-14 09:12:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256975 states. [2020-10-14 09:12:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256975 states to 256975 states and 355562 transitions. [2020-10-14 09:12:10,600 INFO L78 Accepts]: Start accepts. Automaton has 256975 states and 355562 transitions. Word has length 89 [2020-10-14 09:12:10,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:12:10,600 INFO L479 AbstractCegarLoop]: Abstraction has 256975 states and 355562 transitions. [2020-10-14 09:12:10,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:12:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand 256975 states and 355562 transitions. [2020-10-14 09:12:10,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-14 09:12:10,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:10,619 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:12:10,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:12:10,620 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash -562394310, now seen corresponding path program 1 times [2020-10-14 09:12:10,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:10,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982365808] [2020-10-14 09:12:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:10,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:10,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:10,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:10,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:10,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:11,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:11,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:11,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:11,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:12,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:12,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:12,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:12,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:12,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:12,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:12,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:12,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:13,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:13,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:13,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:13,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:14,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:14,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:14,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:15,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:15,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 09:12:15,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-14 09:12:15,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:12:15,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:15,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:15,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:12:15,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:12:15,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 09:12:15,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:12:15,772 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:12:15,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:15,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:15,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:15,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:15,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:15,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:12:15,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:15,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:15,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:15,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:15,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:15,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:12:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:12:15,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982365808] [2020-10-14 09:12:15,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:12:15,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:12:15,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691189967] [2020-10-14 09:12:15,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:12:15,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:15,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:12:15,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:12:15,792 INFO L87 Difference]: Start difference. First operand 256975 states and 355562 transitions. Second operand 6 states. [2020-10-14 09:12:15,932 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 119