/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 03:49:15,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 03:49:15,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 03:49:15,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 03:49:15,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 03:49:15,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 03:49:15,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 03:49:15,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 03:49:15,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 03:49:15,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 03:49:15,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 03:49:15,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 03:49:15,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 03:49:15,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 03:49:15,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 03:49:15,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 03:49:15,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 03:49:15,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 03:49:15,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 03:49:15,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 03:49:15,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 03:49:15,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 03:49:15,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 03:49:15,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 03:49:15,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 03:49:15,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 03:49:15,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 03:49:15,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 03:49:15,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 03:49:15,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 03:49:15,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 03:49:15,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 03:49:15,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 03:49:15,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 03:49:15,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 03:49:15,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 03:49:15,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 03:49:15,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 03:49:15,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 03:49:15,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 03:49:15,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 03:49:15,741 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 [2020-10-15 03:49:15,772 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 03:49:15,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 03:49:15,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 03:49:15,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 03:49:15,775 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 03:49:15,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 03:49:15,775 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 03:49:15,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 03:49:15,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 03:49:15,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 03:49:15,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 03:49:15,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 03:49:15,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 03:49:15,777 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 03:49:15,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 03:49:15,777 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 03:49:15,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 03:49:15,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 03:49:15,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 03:49:15,778 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 03:49:15,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 03:49:15,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:49:15,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 03:49:15,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 03:49:15,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 03:49:15,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 03:49:15,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 03:49:15,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 03:49:15,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 03:49:15,781 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 03:49:16,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 03:49:16,111 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 03:49:16,115 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 03:49:16,117 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 03:49:16,117 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 03:49:16,118 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-15 03:49:16,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd4d53137/090a35d5583d408b9966e66a0704badd/FLAG7ba0070fd [2020-10-15 03:49:16,613 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 03:49:16,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-15 03:49:16,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd4d53137/090a35d5583d408b9966e66a0704badd/FLAG7ba0070fd [2020-10-15 03:49:16,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd4d53137/090a35d5583d408b9966e66a0704badd [2020-10-15 03:49:17,004 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 03:49:17,006 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 03:49:17,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 03:49:17,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 03:49:17,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 03:49:17,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:49:16" (1/1) ... [2020-10-15 03:49:17,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@105928f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:49:17, skipping insertion in model container [2020-10-15 03:49:17,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:49:16" (1/1) ... [2020-10-15 03:49:17,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 03:49:17,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 03:49:17,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:49:17,369 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 03:49:17,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:49:17,581 INFO L208 MainTranslator]: Completed translation [2020-10-15 03:49:17,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:49:17 WrapperNode [2020-10-15 03:49:17,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 03:49:17,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 03:49:17,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 03:49:17,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 03:49:17,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:49:17" (1/1) ... [2020-10-15 03:49:17,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:49:17" (1/1) ... [2020-10-15 03:49:17,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:49:17" (1/1) ... [2020-10-15 03:49:17,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:49:17" (1/1) ... [2020-10-15 03:49:17,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:49:17" (1/1) ... [2020-10-15 03:49:17,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:49:17" (1/1) ... [2020-10-15 03:49:17,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:49:17" (1/1) ... [2020-10-15 03:49:17,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 03:49:17,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 03:49:17,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 03:49:17,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 03:49:17,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:49:17" (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 [2020-10-15 03:49:17,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 03:49:17,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 03:49:17,693 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 03:49:17,693 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 03:49:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 03:49:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-15 03:49:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-15 03:49:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-15 03:49:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 03:49:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 03:49:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-15 03:49:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-15 03:49:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-15 03:49:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-15 03:49:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-15 03:49:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-15 03:49:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-15 03:49:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-15 03:49:17,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 03:49:17,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 03:49:17,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 03:49:18,303 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 03:49:18,304 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 03:49:18,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:49:18 BoogieIcfgContainer [2020-10-15 03:49:18,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 03:49:18,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 03:49:18,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 03:49:18,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 03:49:18,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:49:16" (1/3) ... [2020-10-15 03:49:18,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad6f9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:49:18, skipping insertion in model container [2020-10-15 03:49:18,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:49:17" (2/3) ... [2020-10-15 03:49:18,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad6f9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:49:18, skipping insertion in model container [2020-10-15 03:49:18,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:49:18" (3/3) ... [2020-10-15 03:49:18,321 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-15 03:49:18,332 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 03:49:18,340 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 03:49:18,355 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 03:49:18,380 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 03:49:18,381 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 03:49:18,381 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 03:49:18,381 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 03:49:18,382 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 03:49:18,382 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 03:49:18,382 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 03:49:18,382 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 03:49:18,404 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-15 03:49:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-15 03:49:18,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:49:18,416 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] [2020-10-15 03:49:18,416 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:49:18,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:49:18,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2035014399, now seen corresponding path program 1 times [2020-10-15 03:49:18,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:49:18,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508705693] [2020-10-15 03:49:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:49:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:18,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:19,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:19,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:19,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:19,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:21,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:21,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 03:49:21,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:49:21,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2980 [2020-10-15 03:49:21,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:21,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:21,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:49:21,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:49:21,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 03:49:21,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-15 03:49:22,006 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:49:22,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:49:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:22,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:22,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:22,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:49:22,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:49:22,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:49:22,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:22,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:22,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:49:22,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:49:22,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:49:22,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:49:22,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508705693] [2020-10-15 03:49:22,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:49:22,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:49:22,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134177905] [2020-10-15 03:49:22,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:49:22,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:49:22,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:49:22,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:49:22,076 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 7 states. [2020-10-15 03:49:22,293 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-15 03:49:22,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:49:22,913 INFO L93 Difference]: Finished difference Result 535 states and 848 transitions. [2020-10-15 03:49:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 03:49:22,915 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-15 03:49:22,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:49:22,933 INFO L225 Difference]: With dead ends: 535 [2020-10-15 03:49:22,933 INFO L226 Difference]: Without dead ends: 431 [2020-10-15 03:49:22,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-15 03:49:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-10-15 03:49:23,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 189. [2020-10-15 03:49:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-15 03:49:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 282 transitions. [2020-10-15 03:49:23,026 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 282 transitions. Word has length 52 [2020-10-15 03:49:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:49:23,027 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 282 transitions. [2020-10-15 03:49:23,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:49:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 282 transitions. [2020-10-15 03:49:23,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 03:49:23,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:49:23,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:49:23,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 03:49:23,031 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:49:23,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:49:23,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1357595824, now seen corresponding path program 1 times [2020-10-15 03:49:23,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:49:23,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867696055] [2020-10-15 03:49:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:49:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:23,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:23,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:23,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:23,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:23,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:24,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:24,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 03:49:24,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:49:24,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1462 [2020-10-15 03:49:24,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:24,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:24,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:49:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-15 03:49:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 03:49:24,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:49:24,752 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:49:24,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:49:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:24,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:24,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:24,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:49:24,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:49:24,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:49:24,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:24,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:24,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:49:24,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:49:24,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:49:24,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:49:24,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867696055] [2020-10-15 03:49:24,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:49:24,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:49:24,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662304761] [2020-10-15 03:49:24,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:49:24,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:49:24,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:49:24,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:49:24,787 INFO L87 Difference]: Start difference. First operand 189 states and 282 transitions. Second operand 4 states. [2020-10-15 03:49:24,951 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-15 03:49:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:49:25,601 INFO L93 Difference]: Finished difference Result 473 states and 732 transitions. [2020-10-15 03:49:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:49:25,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-15 03:49:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:49:25,604 INFO L225 Difference]: With dead ends: 473 [2020-10-15 03:49:25,605 INFO L226 Difference]: Without dead ends: 315 [2020-10-15 03:49:25,607 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 [2020-10-15 03:49:25,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-15 03:49:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 313. [2020-10-15 03:49:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-15 03:49:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 478 transitions. [2020-10-15 03:49:25,632 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 478 transitions. Word has length 53 [2020-10-15 03:49:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:49:25,633 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 478 transitions. [2020-10-15 03:49:25,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:49:25,633 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 478 transitions. [2020-10-15 03:49:25,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 03:49:25,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:49:25,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:49:25,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 03:49:25,636 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:49:25,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:49:25,636 INFO L82 PathProgramCache]: Analyzing trace with hash -977131367, now seen corresponding path program 1 times [2020-10-15 03:49:25,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:49:25,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035946244] [2020-10-15 03:49:25,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:49:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:25,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:25,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:25,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:25,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:26,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:26,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 03:49:26,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:49:26,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 737 [2020-10-15 03:49:26,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:26,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:26,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:49:26,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-15 03:49:26,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 03:49:26,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:26,569 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:49:26,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:49:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:26,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:26,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:26,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:49:26,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:49:26,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:49:26,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:26,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:26,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:49:26,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:49:26,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:49:26,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:49:26,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035946244] [2020-10-15 03:49:26,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:49:26,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:49:26,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700055528] [2020-10-15 03:49:26,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:49:26,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:49:26,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:49:26,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:49:26,628 INFO L87 Difference]: Start difference. First operand 313 states and 478 transitions. Second operand 4 states. [2020-10-15 03:49:26,791 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-15 03:49:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:49:27,312 INFO L93 Difference]: Finished difference Result 813 states and 1268 transitions. [2020-10-15 03:49:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:49:27,313 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-15 03:49:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:49:27,317 INFO L225 Difference]: With dead ends: 813 [2020-10-15 03:49:27,317 INFO L226 Difference]: Without dead ends: 531 [2020-10-15 03:49:27,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:49:27,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2020-10-15 03:49:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 529. [2020-10-15 03:49:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-10-15 03:49:27,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 816 transitions. [2020-10-15 03:49:27,372 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 816 transitions. Word has length 54 [2020-10-15 03:49:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:49:27,373 INFO L479 AbstractCegarLoop]: Abstraction has 529 states and 816 transitions. [2020-10-15 03:49:27,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:49:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 816 transitions. [2020-10-15 03:49:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 03:49:27,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:49:27,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:49:27,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 03:49:27,381 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:49:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:49:27,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1609094564, now seen corresponding path program 1 times [2020-10-15 03:49:27,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:49:27,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852719073] [2020-10-15 03:49:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:49:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:27,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:27,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:27,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:27,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:27,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 03:49:27,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:49:27,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-15 03:49:27,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:27,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:27,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:49:27,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-15 03:49:27,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 03:49:27,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:28,017 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:49:28,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:49:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:28,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:28,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:28,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:49:28,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:49:28,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:49:28,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:28,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:28,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:49:28,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:49:28,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:49:28,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:49:28,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852719073] [2020-10-15 03:49:28,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:49:28,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:49:28,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92163238] [2020-10-15 03:49:28,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:49:28,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:49:28,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:49:28,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:49:28,057 INFO L87 Difference]: Start difference. First operand 529 states and 816 transitions. Second operand 4 states. [2020-10-15 03:49:28,271 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-15 03:49:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:49:28,790 INFO L93 Difference]: Finished difference Result 1397 states and 2178 transitions. [2020-10-15 03:49:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:49:28,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-15 03:49:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:49:28,796 INFO L225 Difference]: With dead ends: 1397 [2020-10-15 03:49:28,796 INFO L226 Difference]: Without dead ends: 899 [2020-10-15 03:49:28,798 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 [2020-10-15 03:49:28,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2020-10-15 03:49:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2020-10-15 03:49:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-10-15 03:49:28,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1384 transitions. [2020-10-15 03:49:28,851 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1384 transitions. Word has length 55 [2020-10-15 03:49:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:49:28,852 INFO L479 AbstractCegarLoop]: Abstraction has 897 states and 1384 transitions. [2020-10-15 03:49:28,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:49:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1384 transitions. [2020-10-15 03:49:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 03:49:28,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:49:28,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:49:28,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 03:49:28,854 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:49:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:49:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash -252889926, now seen corresponding path program 1 times [2020-10-15 03:49:28,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:49:28,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845039753] [2020-10-15 03:49:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:49:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:28,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:28,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:29,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:29,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 03:49:29,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:49:29,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-15 03:49:29,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:29,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:29,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:49:29,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-15 03:49:29,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 03:49:29,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:29,312 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:49:29,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:49:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:29,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:29,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:29,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:49:29,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:49:29,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-15 03:49:29,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:29,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:29,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:49:29,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:49:29,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:49:29,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:49:29,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845039753] [2020-10-15 03:49:29,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:49:29,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:49:29,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632689238] [2020-10-15 03:49:29,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:49:29,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:49:29,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:49:29,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:49:29,360 INFO L87 Difference]: Start difference. First operand 897 states and 1384 transitions. Second operand 4 states. [2020-10-15 03:49:29,495 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-15 03:49:30,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:49:30,083 INFO L93 Difference]: Finished difference Result 2373 states and 3674 transitions. [2020-10-15 03:49:30,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:49:30,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-15 03:49:30,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:49:30,092 INFO L225 Difference]: With dead ends: 2373 [2020-10-15 03:49:30,093 INFO L226 Difference]: Without dead ends: 1507 [2020-10-15 03:49:30,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:49:30,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2020-10-15 03:49:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1505. [2020-10-15 03:49:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1505 states. [2020-10-15 03:49:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2304 transitions. [2020-10-15 03:49:30,181 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2304 transitions. Word has length 56 [2020-10-15 03:49:30,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:49:30,182 INFO L479 AbstractCegarLoop]: Abstraction has 1505 states and 2304 transitions. [2020-10-15 03:49:30,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:49:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2304 transitions. [2020-10-15 03:49:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-15 03:49:30,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:49:30,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:49:30,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 03:49:30,183 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:49:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:49:30,184 INFO L82 PathProgramCache]: Analyzing trace with hash 38879762, now seen corresponding path program 1 times [2020-10-15 03:49:30,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:49:30,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913708210] [2020-10-15 03:49:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:49:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:30,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:30,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:30,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:30,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-15 03:49:30,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:49:30,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-15 03:49:30,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:30,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:30,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:49:30,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-15 03:49:30,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 03:49:30,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 03:49:30,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:49:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:30,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:30,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:30,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:49:30,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:49:30,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:49:30,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:30,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:30,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:49:30,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:49:30,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:49:30,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:49:30,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913708210] [2020-10-15 03:49:30,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:49:30,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:49:30,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844719918] [2020-10-15 03:49:30,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:49:30,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:49:30,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:49:30,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:49:30,797 INFO L87 Difference]: Start difference. First operand 1505 states and 2304 transitions. Second operand 7 states. [2020-10-15 03:49:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:49:32,066 INFO L93 Difference]: Finished difference Result 6505 states and 9924 transitions. [2020-10-15 03:49:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:49:32,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-15 03:49:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:49:32,094 INFO L225 Difference]: With dead ends: 6505 [2020-10-15 03:49:32,094 INFO L226 Difference]: Without dead ends: 5031 [2020-10-15 03:49:32,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:49:32,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5031 states. [2020-10-15 03:49:32,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5031 to 5025. [2020-10-15 03:49:32,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5025 states. [2020-10-15 03:49:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 7616 transitions. [2020-10-15 03:49:32,535 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 7616 transitions. Word has length 57 [2020-10-15 03:49:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:49:32,535 INFO L479 AbstractCegarLoop]: Abstraction has 5025 states and 7616 transitions. [2020-10-15 03:49:32,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:49:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 7616 transitions. [2020-10-15 03:49:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-15 03:49:32,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:49:32,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:49:32,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 03:49:32,538 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:49:32,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:49:32,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1617211868, now seen corresponding path program 1 times [2020-10-15 03:49:32,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:49:32,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718648617] [2020-10-15 03:49:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:49:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:32,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:32,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:32,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-15 03:49:32,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:49:32,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-15 03:49:32,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:32,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:32,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:49:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-15 03:49:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-15 03:49:32,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:32,845 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:49:32,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:49:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:32,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:32,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:32,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:49:32,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:49:32,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:49:32,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:32,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:32,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:49:32,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:49:32,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:49:32,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:49:32,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718648617] [2020-10-15 03:49:32,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:49:32,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:49:32,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312623614] [2020-10-15 03:49:32,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:49:32,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:49:32,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:49:32,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:49:32,878 INFO L87 Difference]: Start difference. First operand 5025 states and 7616 transitions. Second operand 5 states. [2020-10-15 03:49:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:49:34,203 INFO L93 Difference]: Finished difference Result 10275 states and 15457 transitions. [2020-10-15 03:49:34,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:49:34,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-15 03:49:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:49:34,252 INFO L225 Difference]: With dead ends: 10275 [2020-10-15 03:49:34,252 INFO L226 Difference]: Without dead ends: 10273 [2020-10-15 03:49:34,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:49:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10273 states. [2020-10-15 03:49:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10273 to 5281. [2020-10-15 03:49:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5281 states. [2020-10-15 03:49:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7872 transitions. [2020-10-15 03:49:34,689 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7872 transitions. Word has length 59 [2020-10-15 03:49:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:49:34,690 INFO L479 AbstractCegarLoop]: Abstraction has 5281 states and 7872 transitions. [2020-10-15 03:49:34,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:49:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7872 transitions. [2020-10-15 03:49:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 03:49:34,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:49:34,691 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] [2020-10-15 03:49:34,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 03:49:34,692 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:49:34,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:49:34,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1415659386, now seen corresponding path program 1 times [2020-10-15 03:49:34,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:49:34,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885241362] [2020-10-15 03:49:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:49:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:34,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:34,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:34,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 03:49:34,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:49:34,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-15 03:49:34,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:34,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:34,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:49:34,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:49:34,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 03:49:34,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:49:34,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:49:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:34,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:34,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:34,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:49:34,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:49:34,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:49:34,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:34,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:34,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:49:34,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:49:34,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:49:34,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:49:34,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885241362] [2020-10-15 03:49:34,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:49:34,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:49:34,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957419160] [2020-10-15 03:49:34,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:49:34,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:49:34,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:49:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:49:34,968 INFO L87 Difference]: Start difference. First operand 5281 states and 7872 transitions. Second operand 4 states. [2020-10-15 03:49:35,122 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-15 03:49:36,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:49:36,036 INFO L93 Difference]: Finished difference Result 12895 states and 19240 transitions. [2020-10-15 03:49:36,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:49:36,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-15 03:49:36,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:49:36,096 INFO L225 Difference]: With dead ends: 12895 [2020-10-15 03:49:36,097 INFO L226 Difference]: Without dead ends: 7645 [2020-10-15 03:49:36,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:49:36,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7645 states. [2020-10-15 03:49:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7645 to 7643. [2020-10-15 03:49:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7643 states. [2020-10-15 03:49:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7643 states to 7643 states and 11342 transitions. [2020-10-15 03:49:36,687 INFO L78 Accepts]: Start accepts. Automaton has 7643 states and 11342 transitions. Word has length 60 [2020-10-15 03:49:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:49:36,687 INFO L479 AbstractCegarLoop]: Abstraction has 7643 states and 11342 transitions. [2020-10-15 03:49:36,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:49:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7643 states and 11342 transitions. [2020-10-15 03:49:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-15 03:49:36,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:49:36,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:49:36,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 03:49:36,693 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:49:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:49:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1678281240, now seen corresponding path program 1 times [2020-10-15 03:49:36,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:49:36,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429047549] [2020-10-15 03:49:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:49:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:36,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:36,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:36,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:38,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:38,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-15 03:49:38,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:49:38,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2171 [2020-10-15 03:49:38,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:38,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:38,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:49:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:49:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-15 03:49:38,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:39,071 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:49:39,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:49:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:39,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:39,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:39,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:49:39,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:49:39,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:49:39,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:39,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:39,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:49:39,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:49:39,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:49:39,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 03:49:39,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429047549] [2020-10-15 03:49:39,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:49:39,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 03:49:39,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222855779] [2020-10-15 03:49:39,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:49:39,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:49:39,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:49:39,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:49:39,115 INFO L87 Difference]: Start difference. First operand 7643 states and 11342 transitions. Second operand 5 states. [2020-10-15 03:49:39,247 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-15 03:49:40,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:49:40,328 INFO L93 Difference]: Finished difference Result 17857 states and 26577 transitions. [2020-10-15 03:49:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:49:40,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-10-15 03:49:40,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:49:40,361 INFO L225 Difference]: With dead ends: 17857 [2020-10-15 03:49:40,361 INFO L226 Difference]: Without dead ends: 12607 [2020-10-15 03:49:40,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:49:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12607 states. [2020-10-15 03:49:40,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12607 to 12603. [2020-10-15 03:49:40,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12603 states. [2020-10-15 03:49:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12603 states to 12603 states and 18606 transitions. [2020-10-15 03:49:41,022 INFO L78 Accepts]: Start accepts. Automaton has 12603 states and 18606 transitions. Word has length 81 [2020-10-15 03:49:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:49:41,023 INFO L479 AbstractCegarLoop]: Abstraction has 12603 states and 18606 transitions. [2020-10-15 03:49:41,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:49:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 12603 states and 18606 transitions. [2020-10-15 03:49:41,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 03:49:41,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:49:41,028 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:49:41,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 03:49:41,029 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:49:41,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:49:41,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2017956811, now seen corresponding path program 1 times [2020-10-15 03:49:41,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:49:41,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211411054] [2020-10-15 03:49:41,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:49:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:41,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:41,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:41,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:41,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:42,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:42,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:45,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:46,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:46,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 03:49:46,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:49:46,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 03:49:46,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:46,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:46,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:49:46,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:49:46,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-15 03:49:46,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:49:46,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:49:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:46,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:46,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:46,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:49:46,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:49:46,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:49:46,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:46,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:46,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:49:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:49:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:49:46,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 03:49:46,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211411054] [2020-10-15 03:49:46,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:49:46,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:49:46,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039698924] [2020-10-15 03:49:46,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:49:46,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:49:46,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:49:46,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:49:46,245 INFO L87 Difference]: Start difference. First operand 12603 states and 18606 transitions. Second operand 7 states. [2020-10-15 03:49:46,394 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-15 03:49:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:49:48,072 INFO L93 Difference]: Finished difference Result 37691 states and 56355 transitions. [2020-10-15 03:49:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:49:48,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-15 03:49:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:49:48,148 INFO L225 Difference]: With dead ends: 37691 [2020-10-15 03:49:48,148 INFO L226 Difference]: Without dead ends: 31717 [2020-10-15 03:49:48,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:49:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31717 states. [2020-10-15 03:49:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31717 to 21359. [2020-10-15 03:49:49,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21359 states. [2020-10-15 03:49:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21359 states to 21359 states and 31630 transitions. [2020-10-15 03:49:49,979 INFO L78 Accepts]: Start accepts. Automaton has 21359 states and 31630 transitions. Word has length 82 [2020-10-15 03:49:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:49:49,980 INFO L479 AbstractCegarLoop]: Abstraction has 21359 states and 31630 transitions. [2020-10-15 03:49:49,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:49:49,980 INFO L276 IsEmpty]: Start isEmpty. Operand 21359 states and 31630 transitions. [2020-10-15 03:49:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 03:49:49,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:49:49,989 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:49:49,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 03:49:49,990 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:49:49,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:49:49,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1790174654, now seen corresponding path program 1 times [2020-10-15 03:49:49,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:49:49,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850222206] [2020-10-15 03:49:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:49:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:50,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:50,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:50,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:50,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:51,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:52,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:52,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:55,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:55,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 03:49:55,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:49:55,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-15 03:49:55,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:55,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:55,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:49:55,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:49:55,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-15 03:49:55,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:49:55,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:49:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:55,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:55,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:49:55,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:49:55,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:49:55,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:49:55,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:49:55,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:49:55,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:49:55,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:49:55,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:49:55,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:49:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-15 03:49:55,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850222206] [2020-10-15 03:49:55,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:49:55,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:49:55,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209861478] [2020-10-15 03:49:55,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:49:55,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:49:55,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:49:55,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:49:55,221 INFO L87 Difference]: Start difference. First operand 21359 states and 31630 transitions. Second operand 7 states. [2020-10-15 03:49:55,442 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-15 03:49:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:49:57,786 INFO L93 Difference]: Finished difference Result 37307 states and 55313 transitions. [2020-10-15 03:49:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:49:57,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-15 03:49:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:49:57,828 INFO L225 Difference]: With dead ends: 37307 [2020-10-15 03:49:57,828 INFO L226 Difference]: Without dead ends: 33849 [2020-10-15 03:49:57,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:49:57,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33849 states. [2020-10-15 03:49:59,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33849 to 23131. [2020-10-15 03:49:59,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23131 states. [2020-10-15 03:49:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23131 states to 23131 states and 34242 transitions. [2020-10-15 03:49:59,139 INFO L78 Accepts]: Start accepts. Automaton has 23131 states and 34242 transitions. Word has length 82 [2020-10-15 03:49:59,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:49:59,139 INFO L479 AbstractCegarLoop]: Abstraction has 23131 states and 34242 transitions. [2020-10-15 03:49:59,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:49:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 23131 states and 34242 transitions. [2020-10-15 03:49:59,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 03:49:59,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:49:59,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:49:59,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 03:49:59,144 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:49:59,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:49:59,144 INFO L82 PathProgramCache]: Analyzing trace with hash -539505962, now seen corresponding path program 1 times [2020-10-15 03:49:59,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:49:59,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304960662] [2020-10-15 03:49:59,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:49:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:49:59,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:59,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:49:59,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:00,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:00,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 03:50:00,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:50:00,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1686 [2020-10-15 03:50:00,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:00,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:50:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:50:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-15 03:50:00,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:50:01,031 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:50:01,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:01,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:01,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:01,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:01,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:01,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:50:01,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:01,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:01,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:50:01,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:01,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:50:01,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 03:50:01,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304960662] [2020-10-15 03:50:01,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:50:01,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:50:01,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516582931] [2020-10-15 03:50:01,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:50:01,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:01,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:50:01,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:50:01,077 INFO L87 Difference]: Start difference. First operand 23131 states and 34242 transitions. Second operand 7 states. [2020-10-15 03:50:01,225 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-15 03:50:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:03,266 INFO L93 Difference]: Finished difference Result 46689 states and 69231 transitions. [2020-10-15 03:50:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:50:03,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-15 03:50:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:03,309 INFO L225 Difference]: With dead ends: 46689 [2020-10-15 03:50:03,309 INFO L226 Difference]: Without dead ends: 37039 [2020-10-15 03:50:03,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:50:03,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37039 states. [2020-10-15 03:50:04,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37039 to 27203. [2020-10-15 03:50:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27203 states. [2020-10-15 03:50:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27203 states to 27203 states and 40218 transitions. [2020-10-15 03:50:04,808 INFO L78 Accepts]: Start accepts. Automaton has 27203 states and 40218 transitions. Word has length 82 [2020-10-15 03:50:04,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:04,808 INFO L479 AbstractCegarLoop]: Abstraction has 27203 states and 40218 transitions. [2020-10-15 03:50:04,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:50:04,808 INFO L276 IsEmpty]: Start isEmpty. Operand 27203 states and 40218 transitions. [2020-10-15 03:50:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 03:50:04,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:04,814 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:50:04,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 03:50:04,814 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:04,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:04,815 INFO L82 PathProgramCache]: Analyzing trace with hash 354678689, now seen corresponding path program 1 times [2020-10-15 03:50:04,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:04,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74445808] [2020-10-15 03:50:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:04,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:04,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:04,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:04,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:05,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:05,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:05,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:09,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:09,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 03:50:09,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:50:09,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 03:50:09,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:09,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:09,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:50:09,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-15 03:50:09,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-15 03:50:09,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:50:09,994 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:50:09,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:10,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:10,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:10,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:10,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:10,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:50:10,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:10,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:10,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:50:10,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:10,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:50:10,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:50:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 03:50:10,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74445808] [2020-10-15 03:50:10,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:50:10,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:50:10,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669876525] [2020-10-15 03:50:10,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:50:10,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:10,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:50:10,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:50:10,028 INFO L87 Difference]: Start difference. First operand 27203 states and 40218 transitions. Second operand 7 states. [2020-10-15 03:50:10,182 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-15 03:50:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:12,432 INFO L93 Difference]: Finished difference Result 48589 states and 71887 transitions. [2020-10-15 03:50:12,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:50:12,433 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-15 03:50:12,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:12,473 INFO L225 Difference]: With dead ends: 48589 [2020-10-15 03:50:12,473 INFO L226 Difference]: Without dead ends: 40915 [2020-10-15 03:50:12,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:50:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40915 states. [2020-10-15 03:50:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40915 to 30227. [2020-10-15 03:50:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30227 states. [2020-10-15 03:50:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30227 states to 30227 states and 44622 transitions. [2020-10-15 03:50:13,895 INFO L78 Accepts]: Start accepts. Automaton has 30227 states and 44622 transitions. Word has length 82 [2020-10-15 03:50:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:13,895 INFO L479 AbstractCegarLoop]: Abstraction has 30227 states and 44622 transitions. [2020-10-15 03:50:13,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:50:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 30227 states and 44622 transitions. [2020-10-15 03:50:13,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-15 03:50:13,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:13,904 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:50:13,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 03:50:13,905 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:13,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:13,905 INFO L82 PathProgramCache]: Analyzing trace with hash 677054930, now seen corresponding path program 1 times [2020-10-15 03:50:13,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:13,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663126760] [2020-10-15 03:50:13,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:13,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:13,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:14,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:14,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:14,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:15,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:15,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:17,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:17,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:17,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:18,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:18,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:18,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-15 03:50:18,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-15 03:50:18,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 03:50:18,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:18,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:18,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:50:18,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:50:18,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-15 03:50:18,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:50:19,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:19,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:19,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:19,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:19,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:19,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:50:19,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:19,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:19,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:50:19,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:19,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:50:19,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:50:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:50:19,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663126760] [2020-10-15 03:50:19,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:50:19,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:50:19,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350831570] [2020-10-15 03:50:19,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:50:19,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:19,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:50:19,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:50:19,218 INFO L87 Difference]: Start difference. First operand 30227 states and 44622 transitions. Second operand 8 states. [2020-10-15 03:50:19,361 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-15 03:50:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:24,391 INFO L93 Difference]: Finished difference Result 107107 states and 157315 transitions. [2020-10-15 03:50:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:50:24,391 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-15 03:50:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:24,473 INFO L225 Difference]: With dead ends: 107107 [2020-10-15 03:50:24,473 INFO L226 Difference]: Without dead ends: 76913 [2020-10-15 03:50:24,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 03:50:24,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76913 states. [2020-10-15 03:50:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76913 to 40117. [2020-10-15 03:50:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40117 states. [2020-10-15 03:50:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40117 states to 40117 states and 58064 transitions. [2020-10-15 03:50:28,741 INFO L78 Accepts]: Start accepts. Automaton has 40117 states and 58064 transitions. Word has length 85 [2020-10-15 03:50:28,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:28,741 INFO L479 AbstractCegarLoop]: Abstraction has 40117 states and 58064 transitions. [2020-10-15 03:50:28,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:50:28,741 INFO L276 IsEmpty]: Start isEmpty. Operand 40117 states and 58064 transitions. [2020-10-15 03:50:28,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-15 03:50:28,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:28,755 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:50:28,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 03:50:28,755 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:28,756 INFO L82 PathProgramCache]: Analyzing trace with hash 316677009, now seen corresponding path program 1 times [2020-10-15 03:50:28,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:28,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361779736] [2020-10-15 03:50:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:28,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:28,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:28,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:29,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:29,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:31,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:31,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-15 03:50:31,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:50:31,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2671 [2020-10-15 03:50:31,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:31,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:31,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:50:31,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:50:31,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-15 03:50:31,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:50:31,617 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:50:31,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:31,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:31,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:31,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:31,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:31,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:50:31,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:31,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:31,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:50:31,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:31,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:50:31,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:50:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:50:31,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361779736] [2020-10-15 03:50:31,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:50:31,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:50:31,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342736923] [2020-10-15 03:50:31,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:50:31,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:31,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:50:31,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:50:31,649 INFO L87 Difference]: Start difference. First operand 40117 states and 58064 transitions. Second operand 8 states. [2020-10-15 03:50:31,791 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-15 03:50:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:38,306 INFO L93 Difference]: Finished difference Result 99516 states and 143616 transitions. [2020-10-15 03:50:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:50:38,307 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-15 03:50:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:38,407 INFO L225 Difference]: With dead ends: 99516 [2020-10-15 03:50:38,407 INFO L226 Difference]: Without dead ends: 92259 [2020-10-15 03:50:38,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 03:50:38,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92259 states. [2020-10-15 03:50:43,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92259 to 53965. [2020-10-15 03:50:43,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53965 states. [2020-10-15 03:50:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53965 states to 53965 states and 78383 transitions. [2020-10-15 03:50:43,985 INFO L78 Accepts]: Start accepts. Automaton has 53965 states and 78383 transitions. Word has length 85 [2020-10-15 03:50:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:43,986 INFO L479 AbstractCegarLoop]: Abstraction has 53965 states and 78383 transitions. [2020-10-15 03:50:43,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:50:43,986 INFO L276 IsEmpty]: Start isEmpty. Operand 53965 states and 78383 transitions. [2020-10-15 03:50:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-15 03:50:43,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:43,997 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:50:43,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 03:50:43,997 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:43,998 INFO L82 PathProgramCache]: Analyzing trace with hash -745235458, now seen corresponding path program 1 times [2020-10-15 03:50:43,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:43,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005003140] [2020-10-15 03:50:43,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:44,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:44,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:44,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:44,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:44,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:44,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:44,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:44,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:45,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:48,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:48,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-15 03:50:48,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 03:50:48,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4931 [2020-10-15 03:50:48,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:48,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:48,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:50:48,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:50:48,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-15 03:50:48,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:49,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:49,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:49,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:49,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:49,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:49,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:50:49,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:49,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:50:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:50:49,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:50:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:50:49,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005003140] [2020-10-15 03:50:49,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:50:49,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:50:49,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931151135] [2020-10-15 03:50:49,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:50:49,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:49,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:50:49,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:50:49,221 INFO L87 Difference]: Start difference. First operand 53965 states and 78383 transitions. Second operand 8 states. [2020-10-15 03:50:49,350 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-15 03:50:56,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:56,361 INFO L93 Difference]: Finished difference Result 137615 states and 198541 transitions. [2020-10-15 03:50:56,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:50:56,362 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-15 03:50:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:56,451 INFO L225 Difference]: With dead ends: 137615 [2020-10-15 03:50:56,452 INFO L226 Difference]: Without dead ends: 83683 [2020-10-15 03:50:56,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 03:50:56,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83683 states. [2020-10-15 03:51:03,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83683 to 54760. [2020-10-15 03:51:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54760 states. [2020-10-15 03:51:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54760 states to 54760 states and 78114 transitions. [2020-10-15 03:51:03,210 INFO L78 Accepts]: Start accepts. Automaton has 54760 states and 78114 transitions. Word has length 85 [2020-10-15 03:51:03,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:51:03,210 INFO L479 AbstractCegarLoop]: Abstraction has 54760 states and 78114 transitions. [2020-10-15 03:51:03,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:51:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 54760 states and 78114 transitions. [2020-10-15 03:51:03,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-15 03:51:03,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:51:03,220 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:51:03,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 03:51:03,221 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:51:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:51:03,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1926832033, now seen corresponding path program 1 times [2020-10-15 03:51:03,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:51:03,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648906052] [2020-10-15 03:51:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:51:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:51:03,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:03,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:03,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:03,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:03,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:03,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:03,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:03,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:03,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:04,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:04,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:04,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:04,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:08,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:51:08,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-15 03:51:08,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-15 03:51:08,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 03:51:08,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:51:08,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:51:08,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:51:08,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:51:08,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-15 03:51:08,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:51:08,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:51:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:51:08,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:08,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:51:08,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:51:08,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:51:08,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:51:08,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:51:08,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:51:08,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:51:08,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:51:08,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:51:08,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:51:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:51:08,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648906052] [2020-10-15 03:51:08,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:51:08,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:51:08,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598721103] [2020-10-15 03:51:08,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:51:08,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:51:08,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:51:08,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:51:08,501 INFO L87 Difference]: Start difference. First operand 54760 states and 78114 transitions. Second operand 8 states. [2020-10-15 03:51:08,641 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-15 03:51:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:51:23,289 INFO L93 Difference]: Finished difference Result 211350 states and 299816 transitions. [2020-10-15 03:51:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:51:23,289 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-15 03:51:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:51:23,473 INFO L225 Difference]: With dead ends: 211350 [2020-10-15 03:51:23,473 INFO L226 Difference]: Without dead ends: 156623 [2020-10-15 03:51:23,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 03:51:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156623 states. [2020-10-15 03:51:33,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156623 to 78701. [2020-10-15 03:51:33,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78701 states. [2020-10-15 03:51:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78701 states to 78701 states and 109658 transitions. [2020-10-15 03:51:33,628 INFO L78 Accepts]: Start accepts. Automaton has 78701 states and 109658 transitions. Word has length 85 [2020-10-15 03:51:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:51:33,629 INFO L479 AbstractCegarLoop]: Abstraction has 78701 states and 109658 transitions. [2020-10-15 03:51:33,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:51:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 78701 states and 109658 transitions. [2020-10-15 03:51:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-15 03:51:33,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:51:33,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:51:33,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 03:51:33,644 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:51:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:51:33,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1573191025, now seen corresponding path program 1 times [2020-10-15 03:51:33,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:51:33,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308733408] [2020-10-15 03:51:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:51:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:51:33,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:33,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:33,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:33,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:33,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:33,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:34,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:34,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:34,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:34,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:34,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:35,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:35,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:37,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:37,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:38,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:51:38,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-15 03:51:38,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 03:51:38,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 03:51:38,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:51:38,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:51:38,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:51:38,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:51:38,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-15 03:51:38,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:51:38,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:51:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:51:38,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:38,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:51:38,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:51:38,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:51:38,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-15 03:51:38,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:51:38,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:51:38,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:51:38,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:51:38,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:51:38,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:51:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:51:38,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308733408] [2020-10-15 03:51:38,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:51:38,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 03:51:38,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971285507] [2020-10-15 03:51:38,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:51:38,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:51:38,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:51:38,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:51:38,906 INFO L87 Difference]: Start difference. First operand 78701 states and 109658 transitions. Second operand 9 states. [2020-10-15 03:52:13,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:52:13,151 INFO L93 Difference]: Finished difference Result 372848 states and 517317 transitions. [2020-10-15 03:52:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 03:52:13,151 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 87 [2020-10-15 03:52:13,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:52:13,795 INFO L225 Difference]: With dead ends: 372848 [2020-10-15 03:52:13,795 INFO L226 Difference]: Without dead ends: 300418 [2020-10-15 03:52:13,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-15 03:52:14,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300418 states. [2020-10-15 03:52:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300418 to 84876. [2020-10-15 03:52:28,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84876 states. [2020-10-15 03:52:28,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84876 states to 84876 states and 117844 transitions. [2020-10-15 03:52:28,137 INFO L78 Accepts]: Start accepts. Automaton has 84876 states and 117844 transitions. Word has length 87 [2020-10-15 03:52:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:52:28,137 INFO L479 AbstractCegarLoop]: Abstraction has 84876 states and 117844 transitions. [2020-10-15 03:52:28,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:52:28,138 INFO L276 IsEmpty]: Start isEmpty. Operand 84876 states and 117844 transitions. [2020-10-15 03:52:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-15 03:52:28,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:52:28,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:52:28,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 03:52:28,150 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:52:28,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:52:28,150 INFO L82 PathProgramCache]: Analyzing trace with hash 497858646, now seen corresponding path program 1 times [2020-10-15 03:52:28,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:52:28,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341458250] [2020-10-15 03:52:28,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:52:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:52:28,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:28,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:28,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:28,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:29,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:31,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:52:31,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-15 03:52:31,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:52:31,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3546 [2020-10-15 03:52:31,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:52:31,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:52:31,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:52:31,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:52:31,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-15 03:52:31,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:52:32,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:52:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:52:32,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:32,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:52:32,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:52:32,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:52:32,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:52:32,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:52:32,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:52:32,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:52:32,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:52:32,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:52:32,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:52:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:52:32,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341458250] [2020-10-15 03:52:32,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:52:32,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 03:52:32,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333916480] [2020-10-15 03:52:32,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:52:32,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:52:32,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:52:32,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:52:32,113 INFO L87 Difference]: Start difference. First operand 84876 states and 117844 transitions. Second operand 10 states. [2020-10-15 03:52:32,276 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 134