/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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 03:17:36,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 03:17:36,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 03:17:36,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 03:17:36,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 03:17:36,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 03:17:36,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 03:17:36,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 03:17:36,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 03:17:36,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 03:17:36,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 03:17:36,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 03:17:36,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 03:17:36,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 03:17:36,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 03:17:36,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 03:17:36,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 03:17:36,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 03:17:36,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 03:17:36,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 03:17:36,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 03:17:36,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 03:17:36,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 03:17:36,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 03:17:36,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 03:17:36,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 03:17:36,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 03:17:36,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 03:17:36,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 03:17:36,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 03:17:36,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 03:17:36,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 03:17:36,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 03:17:36,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 03:17:36,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 03:17:36,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 03:17:36,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 03:17:36,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 03:17:36,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 03:17:36,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 03:17:36,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 03:17:36,622 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 03:17:36,657 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 03:17:36,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 03:17:36,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 03:17:36,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 03:17:36,660 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 03:17:36,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 03:17:36,661 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 03:17:36,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 03:17:36,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 03:17:36,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 03:17:36,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 03:17:36,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 03:17:36,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 03:17:36,663 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 03:17:36,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 03:17:36,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 03:17:36,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 03:17:36,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 03:17:36,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 03:17:36,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 03:17:36,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 03:17:36,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:17:36,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 03:17:36,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 03:17:36,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 03:17:36,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 03:17:36,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 03:17:36,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 03:17:36,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 03:17:36,667 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 03:17:36,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 03:17:37,015 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 03:17:37,020 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 03:17:37,022 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 03:17:37,024 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 03:17:37,025 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-15 03:17:37,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/caae9c3c3/0e985305034243de8e3399b1fbd8ed44/FLAGe214edf73 [2020-10-15 03:17:37,653 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 03:17:37,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-15 03:17:37,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/caae9c3c3/0e985305034243de8e3399b1fbd8ed44/FLAGe214edf73 [2020-10-15 03:17:37,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/caae9c3c3/0e985305034243de8e3399b1fbd8ed44 [2020-10-15 03:17:37,961 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 03:17:37,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 03:17:37,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 03:17:37,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 03:17:37,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 03:17:37,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:17:37" (1/1) ... [2020-10-15 03:17:37,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1c6851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:17:37, skipping insertion in model container [2020-10-15 03:17:37,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:17:37" (1/1) ... [2020-10-15 03:17:37,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 03:17:38,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 03:17:38,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:17:38,407 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 03:17:38,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:17:38,649 INFO L208 MainTranslator]: Completed translation [2020-10-15 03:17:38,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:17:38 WrapperNode [2020-10-15 03:17:38,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 03:17:38,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 03:17:38,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 03:17:38,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 03:17:38,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:17:38" (1/1) ... [2020-10-15 03:17:38,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:17:38" (1/1) ... [2020-10-15 03:17:38,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:17:38" (1/1) ... [2020-10-15 03:17:38,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:17:38" (1/1) ... [2020-10-15 03:17:38,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:17:38" (1/1) ... [2020-10-15 03:17:38,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:17:38" (1/1) ... [2020-10-15 03:17:38,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:17:38" (1/1) ... [2020-10-15 03:17:38,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 03:17:38,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 03:17:38,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 03:17:38,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 03:17:38,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:17:38" (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 03:17:38,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 03:17:38,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 03:17:38,846 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 03:17:38,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 03:17:38,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 03:17:38,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-15 03:17:38,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-15 03:17:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-15 03:17:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 03:17:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 03:17:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-15 03:17:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-15 03:17:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-15 03:17:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-15 03:17:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-15 03:17:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-15 03:17:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-15 03:17:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-15 03:17:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 03:17:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 03:17:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 03:17:39,493 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 03:17:39,494 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 03:17:39,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:17:39 BoogieIcfgContainer [2020-10-15 03:17:39,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 03:17:39,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 03:17:39,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 03:17:39,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 03:17:39,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:17:37" (1/3) ... [2020-10-15 03:17:39,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3655180c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:17:39, skipping insertion in model container [2020-10-15 03:17:39,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:17:38" (2/3) ... [2020-10-15 03:17:39,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3655180c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:17:39, skipping insertion in model container [2020-10-15 03:17:39,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:17:39" (3/3) ... [2020-10-15 03:17:39,521 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-15 03:17:39,533 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 03:17:39,553 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 03:17:39,569 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 03:17:39,604 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 03:17:39,605 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 03:17:39,605 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 03:17:39,605 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 03:17:39,605 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 03:17:39,605 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 03:17:39,605 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 03:17:39,606 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 03:17:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-10-15 03:17:39,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-15 03:17:39,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:17:39,652 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] [2020-10-15 03:17:39,653 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:17:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:17:39,660 INFO L82 PathProgramCache]: Analyzing trace with hash 542345027, now seen corresponding path program 1 times [2020-10-15 03:17:39,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:17:39,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559460440] [2020-10-15 03:17:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:17:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:40,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:40,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:40,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:41,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:43,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:43,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-15 03:17:43,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:17:43,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3272 [2020-10-15 03:17:43,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:43,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:43,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:17:43,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:17:43,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 03:17:43,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 03:17:43,643 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-15 03:17:43,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:17:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:43,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:43,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:43,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:17:43,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:17:43,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-15 03:17:43,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:43,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:43,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:17:43,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:17:43,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:17:43,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:17:43,702 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 03:17:43,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559460440] [2020-10-15 03:17:43,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:17:43,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:17:43,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205244237] [2020-10-15 03:17:43,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:17:43,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:17:43,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:17:43,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:17:43,732 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 7 states. [2020-10-15 03:17:43,976 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-15 03:17:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:17:44,718 INFO L93 Difference]: Finished difference Result 516 states and 810 transitions. [2020-10-15 03:17:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:17:44,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-15 03:17:44,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:17:44,740 INFO L225 Difference]: With dead ends: 516 [2020-10-15 03:17:44,740 INFO L226 Difference]: Without dead ends: 430 [2020-10-15 03:17:44,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:17:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-10-15 03:17:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 128. [2020-10-15 03:17:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-15 03:17:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 185 transitions. [2020-10-15 03:17:44,832 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 185 transitions. Word has length 51 [2020-10-15 03:17:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:17:44,833 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 185 transitions. [2020-10-15 03:17:44,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:17:44,833 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 185 transitions. [2020-10-15 03:17:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 03:17:44,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:17:44,838 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 03:17:44,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 03:17:44,839 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:17:44,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:17:44,840 INFO L82 PathProgramCache]: Analyzing trace with hash 386332930, now seen corresponding path program 1 times [2020-10-15 03:17:44,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:17:44,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865628158] [2020-10-15 03:17:44,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:17:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:44,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:44,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:44,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:44,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:45,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:45,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:46,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:49,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:49,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 03:17:49,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:17:49,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-15 03:17:49,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:49,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:49,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:17:49,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 03:17:49,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-15 03:17:49,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:17:50,063 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-15 03:17:50,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:17:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:50,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:50,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:50,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:17:50,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:17:50,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:17:50,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:50,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:50,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:17:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:17:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:17:50,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:17:50,091 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 03:17:50,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865628158] [2020-10-15 03:17:50,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:17:50,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:17:50,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65761074] [2020-10-15 03:17:50,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:17:50,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:17:50,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:17:50,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:17:50,096 INFO L87 Difference]: Start difference. First operand 128 states and 185 transitions. Second operand 7 states. [2020-10-15 03:17:50,350 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:17:51,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:17:51,204 INFO L93 Difference]: Finished difference Result 700 states and 1084 transitions. [2020-10-15 03:17:51,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:17:51,205 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-15 03:17:51,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:17:51,210 INFO L225 Difference]: With dead ends: 700 [2020-10-15 03:17:51,210 INFO L226 Difference]: Without dead ends: 602 [2020-10-15 03:17:51,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:17:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-10-15 03:17:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 268. [2020-10-15 03:17:51,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-15 03:17:51,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 407 transitions. [2020-10-15 03:17:51,249 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 407 transitions. Word has length 53 [2020-10-15 03:17:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:17:51,250 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 407 transitions. [2020-10-15 03:17:51,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:17:51,250 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 407 transitions. [2020-10-15 03:17:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 03:17:51,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:17:51,253 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 03:17:51,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 03:17:51,253 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:17:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:17:51,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1623750642, now seen corresponding path program 1 times [2020-10-15 03:17:51,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:17:51,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373977816] [2020-10-15 03:17:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:17:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:51,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:51,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:51,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:51,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:51,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:51,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:53,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:56,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:56,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 03:17:56,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:17:56,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-15 03:17:56,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:56,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:56,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:17:56,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:17:56,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 03:17:56,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:17:56,569 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-15 03:17:56,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:17:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:56,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:56,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:56,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:17:56,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:17:56,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:17:56,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:56,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:56,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:17:56,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:17:56,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:17:56,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:17:56,598 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 03:17:56,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373977816] [2020-10-15 03:17:56,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:17:56,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:17:56,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840439415] [2020-10-15 03:17:56,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:17:56,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:17:56,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:17:56,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:17:56,603 INFO L87 Difference]: Start difference. First operand 268 states and 407 transitions. Second operand 7 states. [2020-10-15 03:17:56,792 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:17:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:17:57,375 INFO L93 Difference]: Finished difference Result 934 states and 1449 transitions. [2020-10-15 03:17:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:17:57,376 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-15 03:17:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:17:57,384 INFO L225 Difference]: With dead ends: 934 [2020-10-15 03:17:57,385 INFO L226 Difference]: Without dead ends: 792 [2020-10-15 03:17:57,390 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 03:17:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-10-15 03:17:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 412. [2020-10-15 03:17:57,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-10-15 03:17:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 636 transitions. [2020-10-15 03:17:57,450 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 636 transitions. Word has length 53 [2020-10-15 03:17:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:17:57,453 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 636 transitions. [2020-10-15 03:17:57,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:17:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 636 transitions. [2020-10-15 03:17:57,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 03:17:57,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:17:57,464 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 03:17:57,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 03:17:57,464 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:17:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:17:57,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1600005420, now seen corresponding path program 1 times [2020-10-15 03:17:57,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:17:57,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534730345] [2020-10-15 03:17:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:17:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:57,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:57,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:57,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:57,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:57,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:57,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:58,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:01,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:01,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 03:18:01,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:18:01,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4433 [2020-10-15 03:18:01,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:01,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:18:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:18:01,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 03:18:01,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:18:02,107 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-15 03:18:02,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:02,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:02,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:02,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:02,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:02,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:18:02,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:02,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:02,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:18:02,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:02,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:18:02,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:18:02,136 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 03:18:02,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534730345] [2020-10-15 03:18:02,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:18:02,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:18:02,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702144086] [2020-10-15 03:18:02,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:18:02,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:02,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:18:02,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:18:02,140 INFO L87 Difference]: Start difference. First operand 412 states and 636 transitions. Second operand 7 states. [2020-10-15 03:18:02,308 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:18:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:18:02,708 INFO L93 Difference]: Finished difference Result 991 states and 1539 transitions. [2020-10-15 03:18:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:18:02,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-15 03:18:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:18:02,718 INFO L225 Difference]: With dead ends: 991 [2020-10-15 03:18:02,719 INFO L226 Difference]: Without dead ends: 849 [2020-10-15 03:18:02,722 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 03:18:02,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2020-10-15 03:18:02,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 508. [2020-10-15 03:18:02,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-10-15 03:18:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 789 transitions. [2020-10-15 03:18:02,775 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 789 transitions. Word has length 53 [2020-10-15 03:18:02,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:18:02,777 INFO L479 AbstractCegarLoop]: Abstraction has 508 states and 789 transitions. [2020-10-15 03:18:02,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:18:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 789 transitions. [2020-10-15 03:18:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 03:18:02,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:18:02,780 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 03:18:02,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 03:18:02,780 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:18:02,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:18:02,781 INFO L82 PathProgramCache]: Analyzing trace with hash 629384701, now seen corresponding path program 1 times [2020-10-15 03:18:02,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:18:02,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120102389] [2020-10-15 03:18:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:18:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:02,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:02,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:02,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:02,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:03,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:04,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:04,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 03:18:04,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:18:04,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1463 [2020-10-15 03:18:04,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:04,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:04,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:18:04,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:18:04,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 03:18:04,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:18:04,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:04,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:04,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:04,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:04,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:04,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:18:04,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:04,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:18:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:18:04,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:18:04,526 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 03:18:04,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120102389] [2020-10-15 03:18:04,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:18:04,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:18:04,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456188921] [2020-10-15 03:18:04,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:18:04,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:04,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:18:04,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:18:04,529 INFO L87 Difference]: Start difference. First operand 508 states and 789 transitions. Second operand 7 states. [2020-10-15 03:18:04,867 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:18:05,130 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-10-15 03:18:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:18:05,712 INFO L93 Difference]: Finished difference Result 1280 states and 2001 transitions. [2020-10-15 03:18:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:18:05,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-15 03:18:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:18:05,724 INFO L225 Difference]: With dead ends: 1280 [2020-10-15 03:18:05,725 INFO L226 Difference]: Without dead ends: 802 [2020-10-15 03:18:05,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:18:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2020-10-15 03:18:05,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 508. [2020-10-15 03:18:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-10-15 03:18:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 784 transitions. [2020-10-15 03:18:05,799 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 784 transitions. Word has length 53 [2020-10-15 03:18:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:18:05,800 INFO L479 AbstractCegarLoop]: Abstraction has 508 states and 784 transitions. [2020-10-15 03:18:05,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:18:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 784 transitions. [2020-10-15 03:18:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 03:18:05,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:18:05,801 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 03:18:05,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 03:18:05,802 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:18:05,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:18:05,802 INFO L82 PathProgramCache]: Analyzing trace with hash 609335358, now seen corresponding path program 1 times [2020-10-15 03:18:05,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:18:05,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692893549] [2020-10-15 03:18:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:18:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:05,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:05,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:05,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:06,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:06,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:06,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:06,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:07,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:07,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 03:18:07,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:18:07,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1525 [2020-10-15 03:18:07,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:07,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:18:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:18:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 03:18:07,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:07,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:07,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:07,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:07,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:07,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:07,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:18:07,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:07,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:18:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:18:07,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:18:07,580 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 03:18:07,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692893549] [2020-10-15 03:18:07,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:18:07,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:18:07,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587639210] [2020-10-15 03:18:07,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:18:07,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:07,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:18:07,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:18:07,583 INFO L87 Difference]: Start difference. First operand 508 states and 784 transitions. Second operand 5 states. [2020-10-15 03:18:07,762 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-15 03:18:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:18:08,312 INFO L93 Difference]: Finished difference Result 1784 states and 2788 transitions. [2020-10-15 03:18:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:18:08,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-10-15 03:18:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:18:08,321 INFO L225 Difference]: With dead ends: 1784 [2020-10-15 03:18:08,321 INFO L226 Difference]: Without dead ends: 1306 [2020-10-15 03:18:08,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:18:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2020-10-15 03:18:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1302. [2020-10-15 03:18:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2020-10-15 03:18:08,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2007 transitions. [2020-10-15 03:18:08,430 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2007 transitions. Word has length 53 [2020-10-15 03:18:08,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:18:08,431 INFO L479 AbstractCegarLoop]: Abstraction has 1302 states and 2007 transitions. [2020-10-15 03:18:08,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:18:08,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2007 transitions. [2020-10-15 03:18:08,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 03:18:08,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:18:08,432 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 03:18:08,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 03:18:08,433 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:18:08,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:18:08,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1996276536, now seen corresponding path program 1 times [2020-10-15 03:18:08,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:18:08,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850739055] [2020-10-15 03:18:08,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:18:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:08,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:08,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:08,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:08,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:08,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:08,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:09,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:12,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:12,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 03:18:12,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:18:12,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4305 [2020-10-15 03:18:12,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:12,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:12,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:18:12,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:18:12,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 03:18:12,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:18:13,084 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-15 03:18:13,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:13,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:13,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:13,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:13,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:13,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-15 03:18:13,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:13,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:13,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:18:13,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:13,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:18:13,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:18:13,135 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 03:18:13,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850739055] [2020-10-15 03:18:13,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:18:13,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:18:13,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775789229] [2020-10-15 03:18:13,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:18:13,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:13,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:18:13,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:18:13,140 INFO L87 Difference]: Start difference. First operand 1302 states and 2007 transitions. Second operand 7 states. [2020-10-15 03:18:13,313 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-15 03:18:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:18:13,982 INFO L93 Difference]: Finished difference Result 4242 states and 6543 transitions. [2020-10-15 03:18:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:18:13,984 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-15 03:18:13,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:18:14,001 INFO L225 Difference]: With dead ends: 4242 [2020-10-15 03:18:14,001 INFO L226 Difference]: Without dead ends: 2970 [2020-10-15 03:18:14,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 03:18:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2020-10-15 03:18:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1322. [2020-10-15 03:18:14,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1322 states. [2020-10-15 03:18:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2036 transitions. [2020-10-15 03:18:14,152 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2036 transitions. Word has length 53 [2020-10-15 03:18:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:18:14,152 INFO L479 AbstractCegarLoop]: Abstraction has 1322 states and 2036 transitions. [2020-10-15 03:18:14,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:18:14,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2036 transitions. [2020-10-15 03:18:14,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 03:18:14,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:18:14,154 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 03:18:14,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 03:18:14,154 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:18:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:18:14,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1965820135, now seen corresponding path program 1 times [2020-10-15 03:18:14,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:18:14,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429912936] [2020-10-15 03:18:14,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:18:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:14,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:14,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:14,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:14,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:14,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:15,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:15,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 03:18:15,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:18:15,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 969 [2020-10-15 03:18:15,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:15,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:15,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:18:15,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 03:18:15,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 03:18:15,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:15,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:15,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:15,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:15,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:15,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:15,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:18:15,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:15,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:15,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:18:15,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:15,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:18:15,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:15,276 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 03:18:15,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429912936] [2020-10-15 03:18:15,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:18:15,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:18:15,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113194625] [2020-10-15 03:18:15,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:18:15,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:15,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:18:15,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:18:15,279 INFO L87 Difference]: Start difference. First operand 1322 states and 2036 transitions. Second operand 4 states. [2020-10-15 03:18:15,409 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-15 03:18:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:18:16,140 INFO L93 Difference]: Finished difference Result 2970 states and 4598 transitions. [2020-10-15 03:18:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:18:16,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-15 03:18:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:18:16,153 INFO L225 Difference]: With dead ends: 2970 [2020-10-15 03:18:16,153 INFO L226 Difference]: Without dead ends: 2058 [2020-10-15 03:18:16,164 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 03:18:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2020-10-15 03:18:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 2056. [2020-10-15 03:18:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-10-15 03:18:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 3158 transitions. [2020-10-15 03:18:16,405 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 3158 transitions. Word has length 54 [2020-10-15 03:18:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:18:16,405 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 3158 transitions. [2020-10-15 03:18:16,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:18:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 3158 transitions. [2020-10-15 03:18:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 03:18:16,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:18:16,406 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 03:18:16,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 03:18:16,407 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:18:16,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:18:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash -76560170, now seen corresponding path program 1 times [2020-10-15 03:18:16,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:18:16,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483161029] [2020-10-15 03:18:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:18:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:16,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:16,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:16,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:16,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:16,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:16,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 03:18:16,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:18:16,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-15 03:18:16,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:16,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:16,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:18:16,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-15 03:18:16,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 03:18:16,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:18:17,187 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-15 03:18:17,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:17,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:17,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:17,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:17,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:17,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:18:17,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:17,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:18:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:17,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:18:17,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:18:17,210 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 03:18:17,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483161029] [2020-10-15 03:18:17,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:18:17,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:18:17,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929891011] [2020-10-15 03:18:17,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:18:17,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:17,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:18:17,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:18:17,212 INFO L87 Difference]: Start difference. First operand 2056 states and 3158 transitions. Second operand 4 states. [2020-10-15 03:18:17,337 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-15 03:18:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:18:18,224 INFO L93 Difference]: Finished difference Result 5714 states and 8779 transitions. [2020-10-15 03:18:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:18:18,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-15 03:18:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:18:18,243 INFO L225 Difference]: With dead ends: 5714 [2020-10-15 03:18:18,244 INFO L226 Difference]: Without dead ends: 3696 [2020-10-15 03:18:18,249 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 03:18:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2020-10-15 03:18:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 3688. [2020-10-15 03:18:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3688 states. [2020-10-15 03:18:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 5605 transitions. [2020-10-15 03:18:18,576 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 5605 transitions. Word has length 55 [2020-10-15 03:18:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:18:18,576 INFO L479 AbstractCegarLoop]: Abstraction has 3688 states and 5605 transitions. [2020-10-15 03:18:18,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:18:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 5605 transitions. [2020-10-15 03:18:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 03:18:18,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:18:18,577 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 03:18:18,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 03:18:18,578 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:18:18,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:18:18,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1737980259, now seen corresponding path program 1 times [2020-10-15 03:18:18,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:18:18,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346814368] [2020-10-15 03:18:18,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:18:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:18,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:18,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:18,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:19,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:19,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:19,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 03:18:19,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:18:19,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-15 03:18:19,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:19,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:19,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:18:19,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:18:19,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-15 03:18:19,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:19,828 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-15 03:18:19,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:19,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:19,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:19,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:19,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:19,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-15 03:18:19,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:19,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:19,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:18:19,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:19,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:18:19,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:18:19,885 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 03:18:19,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346814368] [2020-10-15 03:18:19,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:18:19,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:18:19,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941056138] [2020-10-15 03:18:19,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:18:19,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:19,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:18:19,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:18:19,888 INFO L87 Difference]: Start difference. First operand 3688 states and 5605 transitions. Second operand 6 states. [2020-10-15 03:18:20,074 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:18:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:18:20,873 INFO L93 Difference]: Finished difference Result 10953 states and 16657 transitions. [2020-10-15 03:18:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:18:20,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-15 03:18:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:18:20,909 INFO L225 Difference]: With dead ends: 10953 [2020-10-15 03:18:20,909 INFO L226 Difference]: Without dead ends: 7297 [2020-10-15 03:18:20,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:18:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7297 states. [2020-10-15 03:18:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7297 to 7295. [2020-10-15 03:18:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7295 states. [2020-10-15 03:18:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7295 states to 7295 states and 11036 transitions. [2020-10-15 03:18:21,685 INFO L78 Accepts]: Start accepts. Automaton has 7295 states and 11036 transitions. Word has length 56 [2020-10-15 03:18:21,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:18:21,686 INFO L479 AbstractCegarLoop]: Abstraction has 7295 states and 11036 transitions. [2020-10-15 03:18:21,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:18:21,686 INFO L276 IsEmpty]: Start isEmpty. Operand 7295 states and 11036 transitions. [2020-10-15 03:18:21,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 03:18:21,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:18:21,687 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 03:18:21,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 03:18:21,687 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:18:21,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:18:21,688 INFO L82 PathProgramCache]: Analyzing trace with hash 648742552, now seen corresponding path program 1 times [2020-10-15 03:18:21,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:18:21,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589715971] [2020-10-15 03:18:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:18:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:21,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:21,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:21,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:22,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:22,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 03:18:22,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:18:22,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-15 03:18:22,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:22,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:18:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-15 03:18:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 03:18:22,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:22,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:22,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:22,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:22,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:22,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:22,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:18:22,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:22,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:22,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:18:22,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:22,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:18:22,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:18:22,162 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 03:18:22,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589715971] [2020-10-15 03:18:22,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:18:22,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:18:22,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700885769] [2020-10-15 03:18:22,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:18:22,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:22,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:18:22,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:18:22,165 INFO L87 Difference]: Start difference. First operand 7295 states and 11036 transitions. Second operand 4 states. [2020-10-15 03:18:22,352 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-15 03:18:23,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:18:23,987 INFO L93 Difference]: Finished difference Result 20317 states and 30600 transitions. [2020-10-15 03:18:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:18:23,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-15 03:18:23,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:18:24,039 INFO L225 Difference]: With dead ends: 20317 [2020-10-15 03:18:24,040 INFO L226 Difference]: Without dead ends: 13054 [2020-10-15 03:18:24,058 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 03:18:24,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13054 states. [2020-10-15 03:18:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13054 to 13052. [2020-10-15 03:18:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13052 states. [2020-10-15 03:18:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 19407 transitions. [2020-10-15 03:18:25,128 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 19407 transitions. Word has length 56 [2020-10-15 03:18:25,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:18:25,129 INFO L479 AbstractCegarLoop]: Abstraction has 13052 states and 19407 transitions. [2020-10-15 03:18:25,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:18:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 19407 transitions. [2020-10-15 03:18:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-15 03:18:25,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:18:25,130 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 03:18:25,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 03:18:25,130 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:18:25,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:18:25,131 INFO L82 PathProgramCache]: Analyzing trace with hash 555338601, now seen corresponding path program 1 times [2020-10-15 03:18:25,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:18:25,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205126724] [2020-10-15 03:18:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:18:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:25,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:25,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:25,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:25,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-15 03:18:25,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:18:25,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-15 03:18:25,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:25,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:18:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-15 03:18:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 03:18:25,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:18:25,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:25,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:25,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:25,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:25,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:25,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:18:25,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:25,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:18:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:25,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:18:25,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:25,472 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 03:18:25,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205126724] [2020-10-15 03:18:25,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:18:25,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:18:25,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247685307] [2020-10-15 03:18:25,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:18:25,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:25,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:18:25,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:18:25,474 INFO L87 Difference]: Start difference. First operand 13052 states and 19407 transitions. Second operand 4 states. [2020-10-15 03:18:25,613 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-15 03:18:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:18:27,684 INFO L93 Difference]: Finished difference Result 36084 states and 53269 transitions. [2020-10-15 03:18:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:18:27,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-15 03:18:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:18:27,742 INFO L225 Difference]: With dead ends: 36084 [2020-10-15 03:18:27,742 INFO L226 Difference]: Without dead ends: 23064 [2020-10-15 03:18:27,772 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 03:18:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23064 states. [2020-10-15 03:18:30,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23064 to 23062. [2020-10-15 03:18:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23062 states. [2020-10-15 03:18:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23062 states to 23062 states and 33517 transitions. [2020-10-15 03:18:30,152 INFO L78 Accepts]: Start accepts. Automaton has 23062 states and 33517 transitions. Word has length 57 [2020-10-15 03:18:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:18:30,153 INFO L479 AbstractCegarLoop]: Abstraction has 23062 states and 33517 transitions. [2020-10-15 03:18:30,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:18:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 23062 states and 33517 transitions. [2020-10-15 03:18:30,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 03:18:30,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:18:30,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:18:30,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 03:18:30,154 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:18:30,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:18:30,154 INFO L82 PathProgramCache]: Analyzing trace with hash -982604156, now seen corresponding path program 1 times [2020-10-15 03:18:30,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:18:30,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740603656] [2020-10-15 03:18:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:18:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:30,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:30,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:30,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:30,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 03:18:30,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:18:30,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-15 03:18:30,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:30,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:30,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:18:30,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:18:30,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-15 03:18:30,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:30,618 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-15 03:18:30,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:30,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:30,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:30,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:30,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:30,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-15 03:18:30,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:30,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:30,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:18:30,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:30,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:18:30,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:18:30,656 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 03:18:30,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740603656] [2020-10-15 03:18:30,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:18:30,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:18:30,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832378172] [2020-10-15 03:18:30,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:18:30,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:30,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:18:30,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:18:30,658 INFO L87 Difference]: Start difference. First operand 23062 states and 33517 transitions. Second operand 6 states. [2020-10-15 03:18:30,854 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:18:34,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:18:34,520 INFO L93 Difference]: Finished difference Result 68746 states and 99735 transitions. [2020-10-15 03:18:34,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:18:34,520 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-15 03:18:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:18:34,614 INFO L225 Difference]: With dead ends: 68746 [2020-10-15 03:18:34,614 INFO L226 Difference]: Without dead ends: 45716 [2020-10-15 03:18:34,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:18:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45716 states. [2020-10-15 03:18:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45716 to 45714. [2020-10-15 03:18:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45714 states. [2020-10-15 03:18:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45714 states to 45714 states and 65873 transitions. [2020-10-15 03:18:38,548 INFO L78 Accepts]: Start accepts. Automaton has 45714 states and 65873 transitions. Word has length 58 [2020-10-15 03:18:38,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:18:38,548 INFO L479 AbstractCegarLoop]: Abstraction has 45714 states and 65873 transitions. [2020-10-15 03:18:38,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:18:38,548 INFO L276 IsEmpty]: Start isEmpty. Operand 45714 states and 65873 transitions. [2020-10-15 03:18:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 03:18:38,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:18:38,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:18:38,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 03:18:38,550 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:18:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:18:38,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1511894657, now seen corresponding path program 1 times [2020-10-15 03:18:38,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:18:38,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201449003] [2020-10-15 03:18:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:18:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:38,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:38,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:38,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 03:18:38,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:38,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-15 03:18:38,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:38,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:38,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:18:38,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-15 03:18:38,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-15 03:18:38,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:38,826 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-15 03:18:38,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:38,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:38,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:38,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:38,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:38,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:18:38,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:38,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:38,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:18:38,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:38,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:18:38,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:38,847 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 03:18:38,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201449003] [2020-10-15 03:18:38,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:18:38,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:18:38,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131867752] [2020-10-15 03:18:38,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:18:38,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:38,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:18:38,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:18:38,850 INFO L87 Difference]: Start difference. First operand 45714 states and 65873 transitions. Second operand 5 states. [2020-10-15 03:18:45,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:18:45,265 INFO L93 Difference]: Finished difference Result 69210 states and 99238 transitions. [2020-10-15 03:18:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:18:45,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-15 03:18:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:18:45,418 INFO L225 Difference]: With dead ends: 69210 [2020-10-15 03:18:45,418 INFO L226 Difference]: Without dead ends: 69208 [2020-10-15 03:18:45,438 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 03:18:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69208 states. [2020-10-15 03:18:49,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69208 to 46866. [2020-10-15 03:18:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46866 states. [2020-10-15 03:18:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46866 states to 46866 states and 66577 transitions. [2020-10-15 03:18:49,555 INFO L78 Accepts]: Start accepts. Automaton has 46866 states and 66577 transitions. Word has length 58 [2020-10-15 03:18:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:18:49,555 INFO L479 AbstractCegarLoop]: Abstraction has 46866 states and 66577 transitions. [2020-10-15 03:18:49,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:18:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 46866 states and 66577 transitions. [2020-10-15 03:18:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-15 03:18:49,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:18:49,566 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] [2020-10-15 03:18:49,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 03:18:49,567 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:18:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:18:49,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1815387112, now seen corresponding path program 1 times [2020-10-15 03:18:49,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:18:49,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697851029] [2020-10-15 03:18:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:18:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:49,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:49,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:49,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:49,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:50,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:50,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:50,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:51,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:51,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:51,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:52,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:54,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:54,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-15 03:18:54,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-15 03:18:54,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5235 [2020-10-15 03:18:54,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:54,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:18:54,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 03:18:54,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-15 03:18:54,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:18:54,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:54,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:54,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:54,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:54,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:54,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:18:54,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:54,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:54,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:18:54,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:54,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:18:54,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:18:55,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697851029] [2020-10-15 03:18:55,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:18:55,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 03:18:55,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202662153] [2020-10-15 03:18:55,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:18:55,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:55,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:18:55,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:18:55,004 INFO L87 Difference]: Start difference. First operand 46866 states and 66577 transitions. Second operand 6 states. [2020-10-15 03:18:55,140 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-15 03:19:00,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:19:00,122 INFO L93 Difference]: Finished difference Result 75530 states and 107868 transitions. [2020-10-15 03:19:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:19:00,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-15 03:19:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:19:00,289 INFO L225 Difference]: With dead ends: 75530 [2020-10-15 03:19:00,289 INFO L226 Difference]: Without dead ends: 61080 [2020-10-15 03:19:00,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:19:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61080 states. [2020-10-15 03:19:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61080 to 58274. [2020-10-15 03:19:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58274 states. [2020-10-15 03:19:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58274 states to 58274 states and 83329 transitions. [2020-10-15 03:19:05,474 INFO L78 Accepts]: Start accepts. Automaton has 58274 states and 83329 transitions. Word has length 80 [2020-10-15 03:19:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:19:05,474 INFO L479 AbstractCegarLoop]: Abstraction has 58274 states and 83329 transitions. [2020-10-15 03:19:05,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:19:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 58274 states and 83329 transitions. [2020-10-15 03:19:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 03:19:05,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:19:05,480 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 03:19:05,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 03:19:05,480 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:19:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:19:05,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1825858259, now seen corresponding path program 1 times [2020-10-15 03:19:05,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:19:05,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979287714] [2020-10-15 03:19:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:19:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:19:05,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:05,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:05,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:05,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:06,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:06,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:07,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:08,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:09,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:09,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:09,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:10,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:19:10,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 03:19:10,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-15 03:19:10,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-15 03:19:10,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:19:10,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:19:10,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:19:10,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:19:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-15 03:19:10,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:19:10,779 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 25 [2020-10-15 03:19:10,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:19:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:19:10,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:10,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:19:10,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:19:10,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:19:10,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:19:10,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:19:10,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:19:10,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:19:10,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:19:10,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:19:10,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:19:10,932 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 03:19:10,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979287714] [2020-10-15 03:19:10,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:19:10,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 03:19:10,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255713388] [2020-10-15 03:19:10,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:19:10,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:19:10,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:19:10,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:19:10,934 INFO L87 Difference]: Start difference. First operand 58274 states and 83329 transitions. Second operand 9 states. [2020-10-15 03:19:11,107 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:19:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:19:50,349 INFO L93 Difference]: Finished difference Result 417082 states and 587933 transitions. [2020-10-15 03:19:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 03:19:50,350 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2020-10-15 03:19:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:19:50,934 INFO L225 Difference]: With dead ends: 417082 [2020-10-15 03:19:50,935 INFO L226 Difference]: Without dead ends: 358840 [2020-10-15 03:19:51,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2020-10-15 03:19:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358840 states. [2020-10-15 03:20:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358840 to 187658. [2020-10-15 03:20:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187658 states. [2020-10-15 03:20:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187658 states to 187658 states and 264585 transitions. [2020-10-15 03:20:11,978 INFO L78 Accepts]: Start accepts. Automaton has 187658 states and 264585 transitions. Word has length 82 [2020-10-15 03:20:11,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:11,978 INFO L479 AbstractCegarLoop]: Abstraction has 187658 states and 264585 transitions. [2020-10-15 03:20:11,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:20:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 187658 states and 264585 transitions. [2020-10-15 03:20:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 03:20:11,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:11,986 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 03:20:11,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 03:20:11,987 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:11,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2096583143, now seen corresponding path program 1 times [2020-10-15 03:20:11,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:11,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599414451] [2020-10-15 03:20:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:12,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:12,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:12,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:12,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:13,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:13,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:13,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:13,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:13,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:14,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:14,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:15,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:15,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:15,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:16,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:17,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:17,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 03:20:17,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 03:20:17,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-15 03:20:17,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:17,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:17,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:20:17,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:20:17,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-15 03:20:17,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:17,278 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-10-15 03:20:17,453 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-15 03:20:17,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:17,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:17,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:17,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:17,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:17,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:20:17,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:17,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:17,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:17,500 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 03:20:17,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599414451] [2020-10-15 03:20:17,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:20:17,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 03:20:17,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808490445] [2020-10-15 03:20:17,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:20:17,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:17,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:20:17,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:20:17,504 INFO L87 Difference]: Start difference. First operand 187658 states and 264585 transitions. Second operand 9 states. [2020-10-15 03:20:17,655 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 121