/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:20:56,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:20:56,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:20:56,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:20:56,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:20:56,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:20:56,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:20:56,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:20:56,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:20:56,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:20:56,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:20:56,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:20:56,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:20:56,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:20:56,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:20:56,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:20:56,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:20:56,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:20:56,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:20:56,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:20:56,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:20:56,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:20:56,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:20:56,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:20:56,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:20:56,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:20:56,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:20:56,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:20:56,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:20:56,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:20:56,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:20:56,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:20:56,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:20:56,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:20:56,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:20:56,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:20:56,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:20:56,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:20:56,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:20:56,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:20:56,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:20:56,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 08:20:56,695 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:20:56,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:20:56,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:20:56,698 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:20:56,698 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:20:56,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:20:56,699 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:20:56,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:20:56,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:20:56,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:20:56,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:20:56,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:20:56,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:20:56,702 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:20:56,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:20:56,702 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:20:56,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:20:56,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:20:56,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:20:56,703 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:20:56,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:20:56,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:20:56,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:20:56,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:20:56,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:20:56,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:20:56,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:20:56,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:20:56,705 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:20:56,705 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 08:20:57,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:20:57,028 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:20:57,034 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:20:57,037 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:20:57,037 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:20:57,038 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 08:20:57,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72bb64c50/6131ebe1bbc14168a0825c25e65b00df/FLAG2008b0fa3 [2020-10-14 08:20:57,612 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:20:57,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 08:20:57,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72bb64c50/6131ebe1bbc14168a0825c25e65b00df/FLAG2008b0fa3 [2020-10-14 08:20:57,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72bb64c50/6131ebe1bbc14168a0825c25e65b00df [2020-10-14 08:20:57,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:20:57,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:20:57,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:20:57,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:20:57,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:20:57,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:20:57" (1/1) ... [2020-10-14 08:20:57,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@546c585d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:57, skipping insertion in model container [2020-10-14 08:20:57,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:20:57" (1/1) ... [2020-10-14 08:20:57,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:20:58,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:20:58,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:20:58,333 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:20:58,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:20:58,545 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:20:58,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:58 WrapperNode [2020-10-14 08:20:58,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:20:58,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:20:58,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:20:58,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:20:58,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:58" (1/1) ... [2020-10-14 08:20:58,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:58" (1/1) ... [2020-10-14 08:20:58,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:58" (1/1) ... [2020-10-14 08:20:58,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:58" (1/1) ... [2020-10-14 08:20:58,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:58" (1/1) ... [2020-10-14 08:20:58,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:58" (1/1) ... [2020-10-14 08:20:58,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:58" (1/1) ... [2020-10-14 08:20:58,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:20:58,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:20:58,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:20:58,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:20:58,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:20:58,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:20:58,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:20:58,670 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:20:58,670 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:20:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:20:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:20:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:20:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:20:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:20:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:20:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:20:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:20:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:20:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:20:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:20:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:20:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:20:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:20:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:20:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:20:59,387 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:20:59,387 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:20:59,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:20:59 BoogieIcfgContainer [2020-10-14 08:20:59,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:20:59,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:20:59,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:20:59,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:20:59,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:20:57" (1/3) ... [2020-10-14 08:20:59,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439aad1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:20:59, skipping insertion in model container [2020-10-14 08:20:59,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:58" (2/3) ... [2020-10-14 08:20:59,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439aad1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:20:59, skipping insertion in model container [2020-10-14 08:20:59,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:20:59" (3/3) ... [2020-10-14 08:20:59,402 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 08:20:59,413 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:20:59,421 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:20:59,435 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:20:59,463 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:20:59,463 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:20:59,463 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:20:59,463 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:20:59,464 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:20:59,464 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:20:59,464 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:20:59,464 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:20:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-10-14 08:20:59,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 08:20:59,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:59,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:20:59,501 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:59,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:59,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1817058804, now seen corresponding path program 1 times [2020-10-14 08:20:59,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:59,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105450050] [2020-10-14 08:20:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:59,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:00,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:00,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:00,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:02,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:02,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 08:21:02,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:21:02,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2207 [2020-10-14 08:21:02,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:02,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:02,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:02,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 08:21:02,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 08:21:02,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 08:21:02,415 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:02,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:02,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:02,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:02,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:02,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:02,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 08:21:02,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:02,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:02,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:02,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:02,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:02,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:02,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105450050] [2020-10-14 08:21:02,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:02,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:02,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643281748] [2020-10-14 08:21:02,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:02,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:02,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:02,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:02,503 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 4 states. [2020-10-14 08:21:02,733 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-14 08:21:03,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:03,411 INFO L93 Difference]: Finished difference Result 297 states and 502 transitions. [2020-10-14 08:21:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:03,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-14 08:21:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:03,428 INFO L225 Difference]: With dead ends: 297 [2020-10-14 08:21:03,429 INFO L226 Difference]: Without dead ends: 207 [2020-10-14 08:21:03,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-14 08:21:03,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-10-14 08:21:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-14 08:21:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 325 transitions. [2020-10-14 08:21:03,499 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 325 transitions. Word has length 61 [2020-10-14 08:21:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:03,500 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 325 transitions. [2020-10-14 08:21:03,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 325 transitions. [2020-10-14 08:21:03,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 08:21:03,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:03,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:03,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:21:03,505 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:03,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:03,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1858684161, now seen corresponding path program 1 times [2020-10-14 08:21:03,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:03,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989137915] [2020-10-14 08:21:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:03,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:03,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:03,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:03,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:04,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:07,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:07,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 08:21:07,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:21:07,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3919 [2020-10-14 08:21:07,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:07,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:07,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:07,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 08:21:07,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 08:21:07,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:07,740 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:07,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:07,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:07,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:07,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:07,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:07,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:21:07,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:07,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:07,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:07,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:07,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:07,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 08:21:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:07,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989137915] [2020-10-14 08:21:07,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:07,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:07,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177430596] [2020-10-14 08:21:07,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:07,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:07,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:07,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:07,814 INFO L87 Difference]: Start difference. First operand 205 states and 325 transitions. Second operand 4 states. [2020-10-14 08:21:08,069 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-14 08:21:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:08,829 INFO L93 Difference]: Finished difference Result 485 states and 797 transitions. [2020-10-14 08:21:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:08,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-14 08:21:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:08,839 INFO L225 Difference]: With dead ends: 485 [2020-10-14 08:21:08,839 INFO L226 Difference]: Without dead ends: 338 [2020-10-14 08:21:08,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:08,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-14 08:21:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2020-10-14 08:21:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-14 08:21:08,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 545 transitions. [2020-10-14 08:21:08,914 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 545 transitions. Word has length 63 [2020-10-14 08:21:08,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:08,915 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 545 transitions. [2020-10-14 08:21:08,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:08,915 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 545 transitions. [2020-10-14 08:21:08,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 08:21:08,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:08,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:08,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:21:08,919 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:08,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:08,920 INFO L82 PathProgramCache]: Analyzing trace with hash 488010793, now seen corresponding path program 1 times [2020-10-14 08:21:08,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:08,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18859842] [2020-10-14 08:21:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:08,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:10,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:10,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:13,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:13,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 08:21:13,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:21:13,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:21:13,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:13,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:13,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:13,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 08:21:13,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 08:21:13,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:14,175 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:14,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:14,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:14,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:14,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:14,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:14,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:21:14,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:14,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:14,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:14,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:14,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:14,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18859842] [2020-10-14 08:21:14,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:14,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:14,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105551714] [2020-10-14 08:21:14,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:14,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:14,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:14,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:14,207 INFO L87 Difference]: Start difference. First operand 336 states and 545 transitions. Second operand 4 states. [2020-10-14 08:21:14,409 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-14 08:21:15,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:15,176 INFO L93 Difference]: Finished difference Result 856 states and 1415 transitions. [2020-10-14 08:21:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:15,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-14 08:21:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:15,182 INFO L225 Difference]: With dead ends: 856 [2020-10-14 08:21:15,183 INFO L226 Difference]: Without dead ends: 578 [2020-10-14 08:21:15,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-10-14 08:21:15,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 576. [2020-10-14 08:21:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 576 states. [2020-10-14 08:21:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 925 transitions. [2020-10-14 08:21:15,226 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 925 transitions. Word has length 65 [2020-10-14 08:21:15,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:15,227 INFO L479 AbstractCegarLoop]: Abstraction has 576 states and 925 transitions. [2020-10-14 08:21:15,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 925 transitions. [2020-10-14 08:21:15,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:21:15,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:15,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:15,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:21:15,236 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:15,241 INFO L82 PathProgramCache]: Analyzing trace with hash -424133459, now seen corresponding path program 1 times [2020-10-14 08:21:15,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:15,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051725772] [2020-10-14 08:21:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:15,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:15,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:15,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:15,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:15,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:16,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:16,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:19,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:19,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:20,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:20,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:21:20,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:21:20,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 08:21:20,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:20,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:20,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:20,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 08:21:20,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 08:21:20,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:20,536 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:20,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:20,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:20,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:20,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:20,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:21:20,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:20,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:20,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:20,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:20,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:20,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:20,568 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 08:21:20,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051725772] [2020-10-14 08:21:20,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:20,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:20,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62290072] [2020-10-14 08:21:20,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:20,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:20,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:20,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:20,571 INFO L87 Difference]: Start difference. First operand 576 states and 925 transitions. Second operand 4 states. [2020-10-14 08:21:20,759 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:21:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:21,473 INFO L93 Difference]: Finished difference Result 1071 states and 1741 transitions. [2020-10-14 08:21:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:21,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 08:21:21,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:21,479 INFO L225 Difference]: With dead ends: 1071 [2020-10-14 08:21:21,479 INFO L226 Difference]: Without dead ends: 797 [2020-10-14 08:21:21,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2020-10-14 08:21:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 795. [2020-10-14 08:21:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2020-10-14 08:21:21,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1281 transitions. [2020-10-14 08:21:21,517 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1281 transitions. Word has length 67 [2020-10-14 08:21:21,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:21,517 INFO L479 AbstractCegarLoop]: Abstraction has 795 states and 1281 transitions. [2020-10-14 08:21:21,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1281 transitions. [2020-10-14 08:21:21,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:21:21,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:21,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:21,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:21:21,519 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:21,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:21,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1589480936, now seen corresponding path program 1 times [2020-10-14 08:21:21,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:21,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155333984] [2020-10-14 08:21:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:21,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:21,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:21,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:21,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:21,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:22,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:22,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:22,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:26,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:26,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:21:26,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:21:26,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 08:21:26,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:26,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:26,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:26,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:21:26,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 08:21:26,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:26,739 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:26,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:26,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:26,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:26,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:26,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:26,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:21:26,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:26,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:26,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:26,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:26,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:26,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:26,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155333984] [2020-10-14 08:21:26,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:26,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:26,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885494062] [2020-10-14 08:21:26,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:26,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:26,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:26,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:26,787 INFO L87 Difference]: Start difference. First operand 795 states and 1281 transitions. Second operand 4 states. [2020-10-14 08:21:27,047 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:21:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:27,856 INFO L93 Difference]: Finished difference Result 1451 states and 2391 transitions. [2020-10-14 08:21:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:27,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 08:21:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:27,864 INFO L225 Difference]: With dead ends: 1451 [2020-10-14 08:21:27,868 INFO L226 Difference]: Without dead ends: 1058 [2020-10-14 08:21:27,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2020-10-14 08:21:27,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1056. [2020-10-14 08:21:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2020-10-14 08:21:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1718 transitions. [2020-10-14 08:21:27,937 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1718 transitions. Word has length 67 [2020-10-14 08:21:27,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:27,937 INFO L479 AbstractCegarLoop]: Abstraction has 1056 states and 1718 transitions. [2020-10-14 08:21:27,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:27,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1718 transitions. [2020-10-14 08:21:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:21:27,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:27,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:27,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:21:27,938 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:27,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1413057439, now seen corresponding path program 1 times [2020-10-14 08:21:27,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:27,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085212867] [2020-10-14 08:21:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:27,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:28,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:28,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:28,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:29,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:29,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:32,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:32,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:21:32,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:21:32,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:21:32,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:32,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:32,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:21:32,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:21:32,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 08:21:32,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:33,283 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:33,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:33,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:33,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:33,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:33,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:33,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:21:33,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:33,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:33,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:33,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085212867] [2020-10-14 08:21:33,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:33,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:21:33,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605226997] [2020-10-14 08:21:33,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:21:33,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:33,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:21:33,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:33,337 INFO L87 Difference]: Start difference. First operand 1056 states and 1718 transitions. Second operand 5 states. [2020-10-14 08:21:34,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:34,279 INFO L93 Difference]: Finished difference Result 3053 states and 4976 transitions. [2020-10-14 08:21:34,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:34,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-14 08:21:34,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:34,291 INFO L225 Difference]: With dead ends: 3053 [2020-10-14 08:21:34,291 INFO L226 Difference]: Without dead ends: 2022 [2020-10-14 08:21:34,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:21:34,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2020-10-14 08:21:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 2020. [2020-10-14 08:21:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-14 08:21:34,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3271 transitions. [2020-10-14 08:21:34,418 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3271 transitions. Word has length 67 [2020-10-14 08:21:34,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:34,419 INFO L479 AbstractCegarLoop]: Abstraction has 2020 states and 3271 transitions. [2020-10-14 08:21:34,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:21:34,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3271 transitions. [2020-10-14 08:21:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:21:34,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:34,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:34,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:21:34,421 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:34,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:34,422 INFO L82 PathProgramCache]: Analyzing trace with hash 865363584, now seen corresponding path program 1 times [2020-10-14 08:21:34,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:34,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118568098] [2020-10-14 08:21:34,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:34,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:34,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:34,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:34,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:34,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:34,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:35,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:36,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:39,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:39,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:21:39,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:21:39,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:21:39,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:39,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:39,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:39,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 08:21:39,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 08:21:39,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:39,658 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:39,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:39,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:39,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:39,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:39,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:39,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:21:39,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:39,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:39,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:39,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:39,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:39,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:39,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118568098] [2020-10-14 08:21:39,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:39,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:39,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138814283] [2020-10-14 08:21:39,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:39,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:39,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:39,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:39,702 INFO L87 Difference]: Start difference. First operand 2020 states and 3271 transitions. Second operand 4 states. [2020-10-14 08:21:39,954 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:21:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:40,747 INFO L93 Difference]: Finished difference Result 3754 states and 6148 transitions. [2020-10-14 08:21:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:40,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 08:21:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:40,764 INFO L225 Difference]: With dead ends: 3754 [2020-10-14 08:21:40,764 INFO L226 Difference]: Without dead ends: 2747 [2020-10-14 08:21:40,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:40,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2020-10-14 08:21:40,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2745. [2020-10-14 08:21:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2745 states. [2020-10-14 08:21:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 4452 transitions. [2020-10-14 08:21:40,935 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 4452 transitions. Word has length 67 [2020-10-14 08:21:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:40,936 INFO L479 AbstractCegarLoop]: Abstraction has 2745 states and 4452 transitions. [2020-10-14 08:21:40,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 4452 transitions. [2020-10-14 08:21:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 08:21:40,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:40,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:40,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:21:40,943 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:40,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:40,943 INFO L82 PathProgramCache]: Analyzing trace with hash -904568620, now seen corresponding path program 1 times [2020-10-14 08:21:40,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:40,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842779788] [2020-10-14 08:21:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:40,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:41,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:41,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:41,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:41,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:41,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:41,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:43,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:45,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:45,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 08:21:45,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:21:45,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:21:45,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:45,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:21:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:21:45,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:46,146 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:46,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:46,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:46,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:46,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:46,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:46,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:21:46,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:46,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:46,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:46,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:46,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:46,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:46,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842779788] [2020-10-14 08:21:46,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:46,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:46,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994920659] [2020-10-14 08:21:46,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:46,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:46,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:46,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:46,174 INFO L87 Difference]: Start difference. First operand 2745 states and 4452 transitions. Second operand 4 states. [2020-10-14 08:21:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:47,144 INFO L93 Difference]: Finished difference Result 8091 states and 13146 transitions. [2020-10-14 08:21:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:21:47,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-14 08:21:47,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:47,172 INFO L225 Difference]: With dead ends: 8091 [2020-10-14 08:21:47,172 INFO L226 Difference]: Without dead ends: 5449 [2020-10-14 08:21:47,185 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 08:21:47,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5449 states. [2020-10-14 08:21:47,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5449 to 2748. [2020-10-14 08:21:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2748 states. [2020-10-14 08:21:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 4456 transitions. [2020-10-14 08:21:47,390 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 4456 transitions. Word has length 68 [2020-10-14 08:21:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:47,390 INFO L479 AbstractCegarLoop]: Abstraction has 2748 states and 4456 transitions. [2020-10-14 08:21:47,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 4456 transitions. [2020-10-14 08:21:47,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 08:21:47,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:47,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:47,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:21:47,395 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:47,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1182974592, now seen corresponding path program 1 times [2020-10-14 08:21:47,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:47,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669555709] [2020-10-14 08:21:47,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:47,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:47,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:47,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:47,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:47,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:48,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:48,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:52,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:52,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 08:21:52,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:21:52,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:21:52,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:52,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:52,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:21:52,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:21:52,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 08:21:52,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:52,693 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:52,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:52,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:52,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:52,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:52,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:52,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:21:52,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:52,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:52,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:52,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669555709] [2020-10-14 08:21:52,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:52,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:21:52,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879791849] [2020-10-14 08:21:52,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:21:52,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:52,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:21:52,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:52,738 INFO L87 Difference]: Start difference. First operand 2748 states and 4456 transitions. Second operand 5 states. [2020-10-14 08:21:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:54,056 INFO L93 Difference]: Finished difference Result 7896 states and 12862 transitions. [2020-10-14 08:21:54,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:54,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-14 08:21:54,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:54,090 INFO L225 Difference]: With dead ends: 7896 [2020-10-14 08:21:54,090 INFO L226 Difference]: Without dead ends: 5307 [2020-10-14 08:21:54,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:21:54,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5307 states. [2020-10-14 08:21:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5307 to 5305. [2020-10-14 08:21:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5305 states. [2020-10-14 08:21:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5305 states to 5305 states and 8561 transitions. [2020-10-14 08:21:54,477 INFO L78 Accepts]: Start accepts. Automaton has 5305 states and 8561 transitions. Word has length 69 [2020-10-14 08:21:54,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:54,478 INFO L479 AbstractCegarLoop]: Abstraction has 5305 states and 8561 transitions. [2020-10-14 08:21:54,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:21:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 5305 states and 8561 transitions. [2020-10-14 08:21:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:21:54,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:54,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:54,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:21:54,480 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:54,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:54,480 INFO L82 PathProgramCache]: Analyzing trace with hash -492781771, now seen corresponding path program 1 times [2020-10-14 08:21:54,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:54,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776100553] [2020-10-14 08:21:54,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:54,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:54,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:54,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:54,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:54,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:54,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:57,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:59,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:59,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:21:59,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:21:59,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:21:59,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:59,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:59,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:59,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:21:59,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:21:59,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:59,685 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:59,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:59,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:59,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:59,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:59,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:59,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:21:59,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:59,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:59,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:59,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776100553] [2020-10-14 08:21:59,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:59,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:59,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727891886] [2020-10-14 08:21:59,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:59,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:59,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:59,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:59,718 INFO L87 Difference]: Start difference. First operand 5305 states and 8561 transitions. Second operand 4 states. [2020-10-14 08:22:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:00,773 INFO L93 Difference]: Finished difference Result 15833 states and 25547 transitions. [2020-10-14 08:22:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:22:00,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 08:22:00,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:00,820 INFO L225 Difference]: With dead ends: 15833 [2020-10-14 08:22:00,820 INFO L226 Difference]: Without dead ends: 10575 [2020-10-14 08:22:00,832 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 08:22:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10575 states. [2020-10-14 08:22:01,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10575 to 5317. [2020-10-14 08:22:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5317 states. [2020-10-14 08:22:01,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 8577 transitions. [2020-10-14 08:22:01,238 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 8577 transitions. Word has length 70 [2020-10-14 08:22:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:01,238 INFO L479 AbstractCegarLoop]: Abstraction has 5317 states and 8577 transitions. [2020-10-14 08:22:01,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:22:01,238 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 8577 transitions. [2020-10-14 08:22:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:22:01,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:01,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:22:01,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:22:01,240 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:01,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:01,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1550216662, now seen corresponding path program 1 times [2020-10-14 08:22:01,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:01,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434008968] [2020-10-14 08:22:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:01,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:01,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:01,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:01,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:01,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:01,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:01,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:04,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:06,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:06,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:22:06,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:22:06,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:22:06,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:06,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:22:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:22:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 08:22:06,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:06,456 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:06,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:06,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:06,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:06,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:06,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:06,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:22:06,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:06,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:06,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:06,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:06,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:06,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:22:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:06,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434008968] [2020-10-14 08:22:06,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:06,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:22:06,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92502977] [2020-10-14 08:22:06,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:22:06,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:06,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:22:06,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:22:06,488 INFO L87 Difference]: Start difference. First operand 5317 states and 8577 transitions. Second operand 4 states. [2020-10-14 08:22:07,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:07,917 INFO L93 Difference]: Finished difference Result 15293 states and 24775 transitions. [2020-10-14 08:22:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:22:07,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 08:22:07,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:07,944 INFO L225 Difference]: With dead ends: 15293 [2020-10-14 08:22:07,944 INFO L226 Difference]: Without dead ends: 10235 [2020-10-14 08:22:07,955 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 08:22:07,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2020-10-14 08:22:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 10233. [2020-10-14 08:22:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10233 states. [2020-10-14 08:22:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10233 states to 10233 states and 16419 transitions. [2020-10-14 08:22:08,704 INFO L78 Accepts]: Start accepts. Automaton has 10233 states and 16419 transitions. Word has length 71 [2020-10-14 08:22:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:08,705 INFO L479 AbstractCegarLoop]: Abstraction has 10233 states and 16419 transitions. [2020-10-14 08:22:08,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:22:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 10233 states and 16419 transitions. [2020-10-14 08:22:08,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:22:08,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:08,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:22:08,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:22:08,708 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash 341159213, now seen corresponding path program 1 times [2020-10-14 08:22:08,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:08,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911280586] [2020-10-14 08:22:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:08,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:08,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:08,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:08,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:08,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:08,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:09,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:11,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:11,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:13,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:13,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:22:13,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:22:13,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:22:13,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:13,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:13,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:22:13,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:22:13,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 08:22:13,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:13,961 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:13,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:13,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:13,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:13,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:13,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:13,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:22:13,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:13,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:13,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:13,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:13,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:13,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:13,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911280586] [2020-10-14 08:22:13,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:13,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:22:13,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102362122] [2020-10-14 08:22:13,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:22:13,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:13,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:22:13,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:13,988 INFO L87 Difference]: Start difference. First operand 10233 states and 16419 transitions. Second operand 5 states. [2020-10-14 08:22:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:15,973 INFO L93 Difference]: Finished difference Result 29469 states and 47491 transitions. [2020-10-14 08:22:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:22:15,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-14 08:22:15,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:16,028 INFO L225 Difference]: With dead ends: 29469 [2020-10-14 08:22:16,029 INFO L226 Difference]: Without dead ends: 19543 [2020-10-14 08:22:16,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:22:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19543 states. [2020-10-14 08:22:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19543 to 19541. [2020-10-14 08:22:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19541 states. [2020-10-14 08:22:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19541 states to 19541 states and 31247 transitions. [2020-10-14 08:22:17,417 INFO L78 Accepts]: Start accepts. Automaton has 19541 states and 31247 transitions. Word has length 71 [2020-10-14 08:22:17,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:17,418 INFO L479 AbstractCegarLoop]: Abstraction has 19541 states and 31247 transitions. [2020-10-14 08:22:17,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:22:17,418 INFO L276 IsEmpty]: Start isEmpty. Operand 19541 states and 31247 transitions. [2020-10-14 08:22:17,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:22:17,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:17,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:22:17,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:22:17,424 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:17,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1570471009, now seen corresponding path program 1 times [2020-10-14 08:22:17,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:17,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728646894] [2020-10-14 08:22:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:17,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:17,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:17,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:17,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:17,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:17,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:18,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:22,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:22,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:22:22,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:22:22,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:22:22,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:22,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:22:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:22:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 08:22:22,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:22,656 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:22,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:22,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:22,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:22,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:22,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:22,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:22:22,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:22,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:22,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:22,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:22,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:22,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:22,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728646894] [2020-10-14 08:22:22,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:22,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:22:22,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314187384] [2020-10-14 08:22:22,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:22:22,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:22,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:22:22,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:22,683 INFO L87 Difference]: Start difference. First operand 19541 states and 31247 transitions. Second operand 5 states. [2020-10-14 08:22:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:25,121 INFO L93 Difference]: Finished difference Result 38934 states and 62297 transitions. [2020-10-14 08:22:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:22:25,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-14 08:22:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:25,163 INFO L225 Difference]: With dead ends: 38934 [2020-10-14 08:22:25,163 INFO L226 Difference]: Without dead ends: 19872 [2020-10-14 08:22:25,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:22:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19872 states. [2020-10-14 08:22:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19872 to 19738. [2020-10-14 08:22:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19738 states. [2020-10-14 08:22:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19738 states to 19738 states and 31480 transitions. [2020-10-14 08:22:26,610 INFO L78 Accepts]: Start accepts. Automaton has 19738 states and 31480 transitions. Word has length 71 [2020-10-14 08:22:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:26,610 INFO L479 AbstractCegarLoop]: Abstraction has 19738 states and 31480 transitions. [2020-10-14 08:22:26,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:22:26,611 INFO L276 IsEmpty]: Start isEmpty. Operand 19738 states and 31480 transitions. [2020-10-14 08:22:26,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 08:22:26,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:26,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:22:26,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:22:26,613 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:26,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:26,614 INFO L82 PathProgramCache]: Analyzing trace with hash 814614678, now seen corresponding path program 1 times [2020-10-14 08:22:26,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:26,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688013173] [2020-10-14 08:22:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:26,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:26,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:26,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:26,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:26,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:27,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:30,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:31,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:31,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 08:22:31,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:22:31,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 08:22:31,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:31,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:22:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:22:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:22:31,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:31,811 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:31,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:31,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:31,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:31,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:31,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:31,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:22:31,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:31,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:31,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:31,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:31,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:31,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:31,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688013173] [2020-10-14 08:22:31,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:31,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:22:31,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717400073] [2020-10-14 08:22:31,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:22:31,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:31,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:22:31,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:22:31,833 INFO L87 Difference]: Start difference. First operand 19738 states and 31480 transitions. Second operand 4 states. [2020-10-14 08:22:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:35,220 INFO L93 Difference]: Finished difference Result 58919 states and 94059 transitions. [2020-10-14 08:22:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:22:35,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-14 08:22:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:35,298 INFO L225 Difference]: With dead ends: 58919 [2020-10-14 08:22:35,298 INFO L226 Difference]: Without dead ends: 39440 [2020-10-14 08:22:35,341 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 08:22:35,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39440 states. [2020-10-14 08:22:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39440 to 19741. [2020-10-14 08:22:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19741 states. [2020-10-14 08:22:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19741 states to 19741 states and 31484 transitions. [2020-10-14 08:22:37,082 INFO L78 Accepts]: Start accepts. Automaton has 19741 states and 31484 transitions. Word has length 72 [2020-10-14 08:22:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:37,082 INFO L479 AbstractCegarLoop]: Abstraction has 19741 states and 31484 transitions. [2020-10-14 08:22:37,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:22:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 19741 states and 31484 transitions. [2020-10-14 08:22:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 08:22:37,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:37,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:22:37,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:22:37,085 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1815120194, now seen corresponding path program 1 times [2020-10-14 08:22:37,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:37,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838464367] [2020-10-14 08:22:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:37,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:37,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:37,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:37,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:37,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:37,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:37,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:42,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:42,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 08:22:42,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:22:42,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:22:42,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:42,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:22:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:22:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:22:42,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:42,307 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:42,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:42,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:42,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:42,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:42,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:42,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:22:42,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:42,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:42,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:42,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838464367] [2020-10-14 08:22:42,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:42,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:22:42,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087433876] [2020-10-14 08:22:42,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:22:42,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:42,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:22:42,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:22:42,333 INFO L87 Difference]: Start difference. First operand 19741 states and 31484 transitions. Second operand 6 states. [2020-10-14 08:22:42,544 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 08:22:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:49,337 INFO L93 Difference]: Finished difference Result 99817 states and 162650 transitions. [2020-10-14 08:22:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:22:49,338 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-14 08:22:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:49,478 INFO L225 Difference]: With dead ends: 99817 [2020-10-14 08:22:49,478 INFO L226 Difference]: Without dead ends: 81095 [2020-10-14 08:22:49,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:22:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81095 states. [2020-10-14 08:22:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81095 to 37229. [2020-10-14 08:22:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37229 states. [2020-10-14 08:22:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37229 states to 37229 states and 59292 transitions. [2020-10-14 08:22:52,930 INFO L78 Accepts]: Start accepts. Automaton has 37229 states and 59292 transitions. Word has length 73 [2020-10-14 08:22:52,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:52,930 INFO L479 AbstractCegarLoop]: Abstraction has 37229 states and 59292 transitions. [2020-10-14 08:22:52,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:22:52,930 INFO L276 IsEmpty]: Start isEmpty. Operand 37229 states and 59292 transitions. [2020-10-14 08:22:52,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 08:22:52,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:52,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:22:52,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 08:22:52,934 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:52,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:52,934 INFO L82 PathProgramCache]: Analyzing trace with hash -495761630, now seen corresponding path program 1 times [2020-10-14 08:22:52,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:52,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479301495] [2020-10-14 08:22:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:52,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:52,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:53,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:53,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:53,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:53,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:53,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:57,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:57,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 08:22:57,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:22:57,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 08:22:57,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:57,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:57,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:22:57,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:22:57,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 08:22:57,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:58,149 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:58,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:58,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:58,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:58,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:58,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:58,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:22:58,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:58,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:58,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:58,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:58,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:58,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:58,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479301495] [2020-10-14 08:22:58,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:58,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:22:58,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893216053] [2020-10-14 08:22:58,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:22:58,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:58,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:22:58,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:58,178 INFO L87 Difference]: Start difference. First operand 37229 states and 59292 transitions. Second operand 5 states. [2020-10-14 08:22:58,373 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:23:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:05,452 INFO L93 Difference]: Finished difference Result 120563 states and 194623 transitions. [2020-10-14 08:23:05,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:23:05,453 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-14 08:23:05,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:05,584 INFO L225 Difference]: With dead ends: 120563 [2020-10-14 08:23:05,584 INFO L226 Difference]: Without dead ends: 84353 [2020-10-14 08:23:05,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:23:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84353 states. [2020-10-14 08:23:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84353 to 60517. [2020-10-14 08:23:12,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60517 states. [2020-10-14 08:23:12,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60517 states to 60517 states and 96572 transitions. [2020-10-14 08:23:12,304 INFO L78 Accepts]: Start accepts. Automaton has 60517 states and 96572 transitions. Word has length 74 [2020-10-14 08:23:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:12,304 INFO L479 AbstractCegarLoop]: Abstraction has 60517 states and 96572 transitions. [2020-10-14 08:23:12,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:23:12,304 INFO L276 IsEmpty]: Start isEmpty. Operand 60517 states and 96572 transitions. [2020-10-14 08:23:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 08:23:12,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:12,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:23:12,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 08:23:12,308 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:12,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1754206213, now seen corresponding path program 1 times [2020-10-14 08:23:12,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:12,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967851752] [2020-10-14 08:23:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:12,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:12,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:12,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:12,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:12,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:12,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:12,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:17,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:17,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 08:23:17,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:23:17,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-14 08:23:17,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:17,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:17,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:23:17,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 08:23:17,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 08:23:17,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:17,550 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:23:17,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:17,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:17,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:17,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:17,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:17,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:23:17,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:17,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:17,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:17,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:17,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:17,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:23:17,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967851752] [2020-10-14 08:23:17,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:17,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:23:17,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183675280] [2020-10-14 08:23:17,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:23:17,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:17,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:23:17,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:23:17,572 INFO L87 Difference]: Start difference. First operand 60517 states and 96572 transitions. Second operand 5 states. [2020-10-14 08:23:17,769 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:23:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:30,316 INFO L93 Difference]: Finished difference Result 193443 states and 310415 transitions. [2020-10-14 08:23:30,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:23:30,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-14 08:23:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:30,508 INFO L225 Difference]: With dead ends: 193443 [2020-10-14 08:23:30,508 INFO L226 Difference]: Without dead ends: 133945 [2020-10-14 08:23:30,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:23:30,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133945 states. [2020-10-14 08:23:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133945 to 96797. [2020-10-14 08:23:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96797 states. [2020-10-14 08:23:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96797 states to 96797 states and 153668 transitions. [2020-10-14 08:23:41,761 INFO L78 Accepts]: Start accepts. Automaton has 96797 states and 153668 transitions. Word has length 75 [2020-10-14 08:23:41,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:41,761 INFO L479 AbstractCegarLoop]: Abstraction has 96797 states and 153668 transitions. [2020-10-14 08:23:41,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:23:41,762 INFO L276 IsEmpty]: Start isEmpty. Operand 96797 states and 153668 transitions. [2020-10-14 08:23:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 08:23:41,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:41,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:23:41,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 08:23:41,765 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:41,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:41,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1506676663, now seen corresponding path program 1 times [2020-10-14 08:23:41,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:41,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808750251] [2020-10-14 08:23:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:41,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:41,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:41,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:41,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:41,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:41,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:41,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:46,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:46,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 08:23:46,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:23:46,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:23:46,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:46,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:23:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 08:23:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 08:23:46,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:46,983 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:23:46,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:46,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:46,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:46,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:46,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:46,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:23:46,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:46,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:46,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:46,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:46,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:46,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:23:47,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808750251] [2020-10-14 08:23:47,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:47,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:23:47,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487930786] [2020-10-14 08:23:47,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:23:47,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:47,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:23:47,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:23:47,010 INFO L87 Difference]: Start difference. First operand 96797 states and 153668 transitions. Second operand 5 states. [2020-10-14 08:23:47,203 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:24:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:24:08,787 INFO L93 Difference]: Finished difference Result 302915 states and 482687 transitions. [2020-10-14 08:24:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:24:08,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 08:24:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:24:09,201 INFO L225 Difference]: With dead ends: 302915 [2020-10-14 08:24:09,201 INFO L226 Difference]: Without dead ends: 207137 [2020-10-14 08:24:09,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:24:09,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207137 states. [2020-10-14 08:24:26,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207137 to 151309. [2020-10-14 08:24:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151309 states. [2020-10-14 08:24:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151309 states to 151309 states and 238684 transitions. [2020-10-14 08:24:26,358 INFO L78 Accepts]: Start accepts. Automaton has 151309 states and 238684 transitions. Word has length 76 [2020-10-14 08:24:26,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:24:26,359 INFO L479 AbstractCegarLoop]: Abstraction has 151309 states and 238684 transitions. [2020-10-14 08:24:26,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:24:26,359 INFO L276 IsEmpty]: Start isEmpty. Operand 151309 states and 238684 transitions. [2020-10-14 08:24:26,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 08:24:26,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:24:26,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:24:26,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 08:24:26,362 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:24:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:24:26,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2001930023, now seen corresponding path program 1 times [2020-10-14 08:24:26,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:24:26,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105107425] [2020-10-14 08:24:26,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:24:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:26,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:26,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:26,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:26,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:26,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:26,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:26,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:31,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:31,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 08:24:31,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:24:31,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 08:24:31,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:31,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:31,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:24:31,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:24:31,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 08:24:31,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:31,610 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:24:31,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:24:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:31,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:31,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:31,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:24:31,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:24:31,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:24:31,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:31,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:31,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:24:31,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:24:31,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:24:31,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:24:31,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105107425] [2020-10-14 08:24:31,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:24:31,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:24:31,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942060772] [2020-10-14 08:24:31,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:24:31,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:24:31,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:24:31,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:24:31,642 INFO L87 Difference]: Start difference. First operand 151309 states and 238684 transitions. Second operand 6 states. [2020-10-14 08:24:31,875 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 168