/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:10:00,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:10:00,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:10:00,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:10:00,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:10:00,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:10:00,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:10:00,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:10:00,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:10:00,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:10:00,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:10:00,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:10:00,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:10:00,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:10:00,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:10:00,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:10:00,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:10:00,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:10:00,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:10:00,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:10:00,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:10:00,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:10:00,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:10:00,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:10:00,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:10:00,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:10:00,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:10:00,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:10:00,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:10:00,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:10:00,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:10:00,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:10:00,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:10:00,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:10:00,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:10:00,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:10:00,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:10:00,664 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:10:00,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:10:00,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:10:00,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:10:00,673 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 [2020-10-28 19:10:00,700 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:10:00,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:10:00,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:10:00,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:10:00,703 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:10:00,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:10:00,703 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:10:00,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:10:00,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:10:00,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:10:00,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:10:00,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:10:00,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:10:00,705 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:10:00,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:10:00,705 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:10:00,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:10:00,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:10:00,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:10:00,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:10:00,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:10:00,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:10:00,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:10:00,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:10:00,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:10:00,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:10:00,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:10:00,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:10:00,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:10:00,709 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:10:01,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:10:01,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:10:01,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:10:01,132 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:10:01,133 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:10:01,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:10:01,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fff74afab/dfbc20334fe94aa3bd5b7d105a47dd4e/FLAG9e8ec58ec [2020-10-28 19:10:01,816 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:10:01,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:10:01,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fff74afab/dfbc20334fe94aa3bd5b7d105a47dd4e/FLAG9e8ec58ec [2020-10-28 19:10:02,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fff74afab/dfbc20334fe94aa3bd5b7d105a47dd4e [2020-10-28 19:10:02,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:10:02,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:10:02,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:10:02,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:10:02,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:10:02,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:10:02" (1/1) ... [2020-10-28 19:10:02,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29162f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:10:02, skipping insertion in model container [2020-10-28 19:10:02,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:10:02" (1/1) ... [2020-10-28 19:10:02,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:10:02,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:10:02,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:10:02,526 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:10:02,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:10:02,680 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:10:02,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:10:02 WrapperNode [2020-10-28 19:10:02,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:10:02,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:10:02,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:10:02,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:10:02,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:10:02" (1/1) ... [2020-10-28 19:10:02,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:10:02" (1/1) ... [2020-10-28 19:10:02,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:10:02" (1/1) ... [2020-10-28 19:10:02,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:10:02" (1/1) ... [2020-10-28 19:10:02,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:10:02" (1/1) ... [2020-10-28 19:10:02,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:10:02" (1/1) ... [2020-10-28 19:10:02,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:10:02" (1/1) ... [2020-10-28 19:10:02,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:10:02,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:10:02,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:10:02,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:10:02,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:10:02" (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 [2020-10-28 19:10:02,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:10:02,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:10:02,842 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:10:02,842 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:10:02,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:10:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:10:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:10:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:10:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:10:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:10:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:10:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:10:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:10:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:10:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:10:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:10:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:10:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:10:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:10:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:10:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:10:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 19:10:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:10:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:10:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:10:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:10:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:10:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:10:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:10:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:10:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:10:03,796 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:10:03,797 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:10:03,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:10:03 BoogieIcfgContainer [2020-10-28 19:10:03,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:10:03,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:10:03,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:10:03,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:10:03,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:10:02" (1/3) ... [2020-10-28 19:10:03,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144c4144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:10:03, skipping insertion in model container [2020-10-28 19:10:03,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:10:02" (2/3) ... [2020-10-28 19:10:03,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144c4144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:10:03, skipping insertion in model container [2020-10-28 19:10:03,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:10:03" (3/3) ... [2020-10-28 19:10:03,809 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:10:03,822 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:10:03,828 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:10:03,841 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:10:03,871 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:10:03,872 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:10:03,872 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:10:03,872 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:10:03,872 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:10:03,872 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:10:03,873 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:10:03,873 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:10:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states. [2020-10-28 19:10:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:10:03,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:03,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:03,908 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:03,915 INFO L82 PathProgramCache]: Analyzing trace with hash 723589953, now seen corresponding path program 1 times [2020-10-28 19:10:03,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:03,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792152704] [2020-10-28 19:10:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:04,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:04,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:04,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:05,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:05,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:06,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:09,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:09,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:10:09,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:10:09,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 19:10:09,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:09,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:09,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:09,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 19:10:09,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 19:10:09,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:10:09,701 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:09,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:09,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:09,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:09,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:09,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:09,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:10:09,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:09,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:09,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:09,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:09,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:09,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:09,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792152704] [2020-10-28 19:10:09,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:09,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:09,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584969384] [2020-10-28 19:10:09,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:09,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:09,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:09,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:09,801 INFO L87 Difference]: Start difference. First operand 174 states. Second operand 4 states. [2020-10-28 19:10:10,178 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:11,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:11,349 INFO L93 Difference]: Finished difference Result 404 states and 648 transitions. [2020-10-28 19:10:11,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:11,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 19:10:11,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:11,370 INFO L225 Difference]: With dead ends: 404 [2020-10-28 19:10:11,370 INFO L226 Difference]: Without dead ends: 270 [2020-10-28 19:10:11,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:11,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-28 19:10:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2020-10-28 19:10:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-28 19:10:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 397 transitions. [2020-10-28 19:10:11,498 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 397 transitions. Word has length 79 [2020-10-28 19:10:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:11,499 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 397 transitions. [2020-10-28 19:10:11,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 397 transitions. [2020-10-28 19:10:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:10:11,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:11,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:11,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:10:11,503 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:11,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:11,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1441223569, now seen corresponding path program 1 times [2020-10-28 19:10:11,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:11,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553070106] [2020-10-28 19:10:11,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:11,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:11,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:11,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:11,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:12,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:15,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:15,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 19:10:15,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:10:15,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4371 [2020-10-28 19:10:15,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:15,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:15,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:15,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 19:10:15,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 19:10:15,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:10:16,225 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:16,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:16,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:16,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:16,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:16,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:16,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:10:16,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:16,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:16,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:16,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:16,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:16,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:16,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553070106] [2020-10-28 19:10:16,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:16,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:16,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932420703] [2020-10-28 19:10:16,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:16,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:16,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:16,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:16,289 INFO L87 Difference]: Start difference. First operand 267 states and 397 transitions. Second operand 4 states. [2020-10-28 19:10:16,595 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:17,621 INFO L93 Difference]: Finished difference Result 673 states and 1043 transitions. [2020-10-28 19:10:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:17,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 19:10:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:17,628 INFO L225 Difference]: With dead ends: 673 [2020-10-28 19:10:17,628 INFO L226 Difference]: Without dead ends: 454 [2020-10-28 19:10:17,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-28 19:10:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2020-10-28 19:10:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-28 19:10:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 690 transitions. [2020-10-28 19:10:17,667 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 690 transitions. Word has length 80 [2020-10-28 19:10:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:17,667 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 690 transitions. [2020-10-28 19:10:17,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:17,668 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 690 transitions. [2020-10-28 19:10:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 19:10:17,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:17,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:17,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:10:17,675 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:17,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:17,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1606207732, now seen corresponding path program 1 times [2020-10-28 19:10:17,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:17,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74194614] [2020-10-28 19:10:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:17,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:17,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:17,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:18,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:19,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:19,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 19:10:19,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:10:19,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2079 [2020-10-28 19:10:19,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:19,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 19:10:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 19:10:19,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:20,138 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:20,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:20,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:20,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:20,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:20,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:20,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 19:10:20,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:20,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:20,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:20,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:20,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:20,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:10:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:20,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74194614] [2020-10-28 19:10:20,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:20,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:20,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065847152] [2020-10-28 19:10:20,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:20,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:20,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:20,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:20,215 INFO L87 Difference]: Start difference. First operand 451 states and 690 transitions. Second operand 4 states. [2020-10-28 19:10:20,567 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:21,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:21,498 INFO L93 Difference]: Finished difference Result 1193 states and 1870 transitions. [2020-10-28 19:10:21,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:21,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 19:10:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:21,508 INFO L225 Difference]: With dead ends: 1193 [2020-10-28 19:10:21,508 INFO L226 Difference]: Without dead ends: 790 [2020-10-28 19:10:21,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2020-10-28 19:10:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 787. [2020-10-28 19:10:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 787 states. [2020-10-28 19:10:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1222 transitions. [2020-10-28 19:10:21,578 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1222 transitions. Word has length 81 [2020-10-28 19:10:21,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:21,581 INFO L481 AbstractCegarLoop]: Abstraction has 787 states and 1222 transitions. [2020-10-28 19:10:21,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:21,581 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1222 transitions. [2020-10-28 19:10:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 19:10:21,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:21,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:21,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:10:21,592 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:21,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:21,593 INFO L82 PathProgramCache]: Analyzing trace with hash -191967248, now seen corresponding path program 1 times [2020-10-28 19:10:21,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:21,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392277619] [2020-10-28 19:10:21,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:21,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:21,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:21,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:22,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:22,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 19:10:22,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 19:10:22,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1080 [2020-10-28 19:10:22,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:22,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:22,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:22,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 19:10:22,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 19:10:22,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:23,060 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:23,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:23,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:23,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:23,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:23,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:23,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:10:23,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:23,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:23,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:23,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392277619] [2020-10-28 19:10:23,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:23,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:23,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17560364] [2020-10-28 19:10:23,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:23,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:23,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:23,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:23,119 INFO L87 Difference]: Start difference. First operand 787 states and 1222 transitions. Second operand 4 states. [2020-10-28 19:10:23,478 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:24,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:24,360 INFO L93 Difference]: Finished difference Result 2137 states and 3362 transitions. [2020-10-28 19:10:24,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:24,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 19:10:24,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:24,369 INFO L225 Difference]: With dead ends: 2137 [2020-10-28 19:10:24,370 INFO L226 Difference]: Without dead ends: 1398 [2020-10-28 19:10:24,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:24,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2020-10-28 19:10:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1395. [2020-10-28 19:10:24,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1395 states. [2020-10-28 19:10:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2178 transitions. [2020-10-28 19:10:24,457 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2178 transitions. Word has length 82 [2020-10-28 19:10:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:24,457 INFO L481 AbstractCegarLoop]: Abstraction has 1395 states and 2178 transitions. [2020-10-28 19:10:24,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2178 transitions. [2020-10-28 19:10:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 19:10:24,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:24,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:24,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:10:24,459 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:24,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1371140931, now seen corresponding path program 1 times [2020-10-28 19:10:24,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:24,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658330890] [2020-10-28 19:10:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:24,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:24,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:25,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:25,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 19:10:25,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:10:25,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-28 19:10:25,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:25,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 19:10:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 19:10:25,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:25,471 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:25,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:25,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:25,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:25,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:25,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:25,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:10:25,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:25,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:25,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:25,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:25,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:25,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:10:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:25,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658330890] [2020-10-28 19:10:25,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:25,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:25,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720564729] [2020-10-28 19:10:25,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:25,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:25,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:25,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:25,563 INFO L87 Difference]: Start difference. First operand 1395 states and 2178 transitions. Second operand 4 states. [2020-10-28 19:10:25,930 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:26,989 INFO L93 Difference]: Finished difference Result 3833 states and 6022 transitions. [2020-10-28 19:10:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:26,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 19:10:26,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:27,002 INFO L225 Difference]: With dead ends: 3833 [2020-10-28 19:10:27,003 INFO L226 Difference]: Without dead ends: 2486 [2020-10-28 19:10:27,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2020-10-28 19:10:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2483. [2020-10-28 19:10:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2483 states. [2020-10-28 19:10:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 3874 transitions. [2020-10-28 19:10:27,131 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 3874 transitions. Word has length 83 [2020-10-28 19:10:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:27,131 INFO L481 AbstractCegarLoop]: Abstraction has 2483 states and 3874 transitions. [2020-10-28 19:10:27,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 3874 transitions. [2020-10-28 19:10:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 19:10:27,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:27,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:27,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:10:27,133 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:27,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:27,134 INFO L82 PathProgramCache]: Analyzing trace with hash -872231492, now seen corresponding path program 1 times [2020-10-28 19:10:27,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:27,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437261673] [2020-10-28 19:10:27,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:27,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:27,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:28,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:28,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 19:10:28,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:10:28,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1763 [2020-10-28 19:10:28,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:28,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:28,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 19:10:28,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:10:28,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 19:10:28,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:29,378 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:29,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:29,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:29,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:29,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:29,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:29,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:10:29,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:29,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:29,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:29,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:29,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:29,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:29,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437261673] [2020-10-28 19:10:29,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:29,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 19:10:29,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846532760] [2020-10-28 19:10:29,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 19:10:29,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:29,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 19:10:29,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:10:29,433 INFO L87 Difference]: Start difference. First operand 2483 states and 3874 transitions. Second operand 9 states. [2020-10-28 19:10:29,835 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 19:10:31,180 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:10:31,557 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 19:10:31,938 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 19:10:32,330 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:10:32,702 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:33,350 INFO L93 Difference]: Finished difference Result 19528 states and 30656 transitions. [2020-10-28 19:10:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:10:33,351 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-28 19:10:33,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:33,438 INFO L225 Difference]: With dead ends: 19528 [2020-10-28 19:10:33,438 INFO L226 Difference]: Without dead ends: 17093 [2020-10-28 19:10:33,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-10-28 19:10:33,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17093 states. [2020-10-28 19:10:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17093 to 4915. [2020-10-28 19:10:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4915 states. [2020-10-28 19:10:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 7634 transitions. [2020-10-28 19:10:33,950 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 7634 transitions. Word has length 84 [2020-10-28 19:10:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:33,951 INFO L481 AbstractCegarLoop]: Abstraction has 4915 states and 7634 transitions. [2020-10-28 19:10:33,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 19:10:33,951 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 7634 transitions. [2020-10-28 19:10:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 19:10:33,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:33,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:33,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:10:33,953 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:33,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1844247078, now seen corresponding path program 1 times [2020-10-28 19:10:33,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:33,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139229869] [2020-10-28 19:10:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:34,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:34,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:34,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:34,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 19:10:34,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:10:34,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 848 [2020-10-28 19:10:34,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:34,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:10:34,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 19:10:34,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 19:10:34,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:35,262 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:35,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:35,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:35,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:35,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:35,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:35,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:10:35,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:35,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:35,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:35,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:35,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:35,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:35,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139229869] [2020-10-28 19:10:35,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:35,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:10:35,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431399345] [2020-10-28 19:10:35,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:10:35,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:35,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:10:35,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:35,306 INFO L87 Difference]: Start difference. First operand 4915 states and 7634 transitions. Second operand 5 states. [2020-10-28 19:10:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:36,971 INFO L93 Difference]: Finished difference Result 9910 states and 15348 transitions. [2020-10-28 19:10:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:10:36,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-28 19:10:36,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:37,007 INFO L225 Difference]: With dead ends: 9910 [2020-10-28 19:10:37,007 INFO L226 Difference]: Without dead ends: 9907 [2020-10-28 19:10:37,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:10:37,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9907 states. [2020-10-28 19:10:37,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9907 to 5043. [2020-10-28 19:10:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5043 states. [2020-10-28 19:10:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5043 states to 5043 states and 7762 transitions. [2020-10-28 19:10:37,551 INFO L78 Accepts]: Start accepts. Automaton has 5043 states and 7762 transitions. Word has length 85 [2020-10-28 19:10:37,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:37,551 INFO L481 AbstractCegarLoop]: Abstraction has 5043 states and 7762 transitions. [2020-10-28 19:10:37,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:10:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 5043 states and 7762 transitions. [2020-10-28 19:10:37,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 19:10:37,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:37,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:37,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:10:37,553 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:37,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:37,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1039231827, now seen corresponding path program 1 times [2020-10-28 19:10:37,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:37,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999836744] [2020-10-28 19:10:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:37,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:37,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:38,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:38,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 19:10:38,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:10:38,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 787 [2020-10-28 19:10:38,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:38,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:38,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:38,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:10:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 19:10:38,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:38,718 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:38,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:38,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:38,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:38,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:38,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:38,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:10:38,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:38,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:38,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:38,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:38,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999836744] [2020-10-28 19:10:38,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:38,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:38,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044830112] [2020-10-28 19:10:38,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:38,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:38,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:38,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:38,788 INFO L87 Difference]: Start difference. First operand 5043 states and 7762 transitions. Second operand 4 states. [2020-10-28 19:10:39,238 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:40,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:40,601 INFO L93 Difference]: Finished difference Result 14585 states and 22422 transitions. [2020-10-28 19:10:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:40,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-10-28 19:10:40,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:40,626 INFO L225 Difference]: With dead ends: 14585 [2020-10-28 19:10:40,626 INFO L226 Difference]: Without dead ends: 9590 [2020-10-28 19:10:40,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9590 states. [2020-10-28 19:10:41,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9590 to 9523. [2020-10-28 19:10:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9523 states. [2020-10-28 19:10:41,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9523 states to 9523 states and 14514 transitions. [2020-10-28 19:10:41,481 INFO L78 Accepts]: Start accepts. Automaton has 9523 states and 14514 transitions. Word has length 86 [2020-10-28 19:10:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:41,481 INFO L481 AbstractCegarLoop]: Abstraction has 9523 states and 14514 transitions. [2020-10-28 19:10:41,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 9523 states and 14514 transitions. [2020-10-28 19:10:41,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 19:10:41,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:41,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:41,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:10:41,483 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:41,484 INFO L82 PathProgramCache]: Analyzing trace with hash 216766626, now seen corresponding path program 1 times [2020-10-28 19:10:41,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:41,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229383494] [2020-10-28 19:10:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:41,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:41,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:41,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:41,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 19:10:41,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:10:41,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-28 19:10:41,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:41,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:10:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:10:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 19:10:41,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:42,327 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:42,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:42,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:42,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:42,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:42,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:42,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:10:42,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:42,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:42,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:42,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:42,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:42,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:42,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229383494] [2020-10-28 19:10:42,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:42,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:10:42,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472723175] [2020-10-28 19:10:42,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:10:42,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:42,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:10:42,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:42,387 INFO L87 Difference]: Start difference. First operand 9523 states and 14514 transitions. Second operand 5 states. [2020-10-28 19:10:42,759 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:10:43,986 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:10:45,036 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:45,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:45,498 INFO L93 Difference]: Finished difference Result 19452 states and 29816 transitions. [2020-10-28 19:10:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 19:10:45,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-28 19:10:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:45,539 INFO L225 Difference]: With dead ends: 19452 [2020-10-28 19:10:45,539 INFO L226 Difference]: Without dead ends: 14457 [2020-10-28 19:10:45,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:10:45,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14457 states. [2020-10-28 19:10:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14457 to 14387. [2020-10-28 19:10:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14387 states. [2020-10-28 19:10:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14387 states to 14387 states and 21906 transitions. [2020-10-28 19:10:46,842 INFO L78 Accepts]: Start accepts. Automaton has 14387 states and 21906 transitions. Word has length 87 [2020-10-28 19:10:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:46,842 INFO L481 AbstractCegarLoop]: Abstraction has 14387 states and 21906 transitions. [2020-10-28 19:10:46,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:10:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 14387 states and 21906 transitions. [2020-10-28 19:10:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 19:10:46,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:46,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:46,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:10:46,844 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:46,845 INFO L82 PathProgramCache]: Analyzing trace with hash -943652350, now seen corresponding path program 1 times [2020-10-28 19:10:46,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:46,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825347823] [2020-10-28 19:10:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:46,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:46,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:47,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:47,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:50,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:50,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 19:10:50,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:10:50,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3582 [2020-10-28 19:10:50,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:50,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:50,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:50,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 19:10:50,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 19:10:50,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:50,802 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:50,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:50,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:50,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:50,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:50,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:50,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:10:50,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:50,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:50,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:50,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:50,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:50,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:50,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825347823] [2020-10-28 19:10:50,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:50,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:50,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835137373] [2020-10-28 19:10:50,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:50,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:50,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:50,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:50,851 INFO L87 Difference]: Start difference. First operand 14387 states and 21906 transitions. Second operand 4 states. [2020-10-28 19:10:51,203 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:53,382 INFO L93 Difference]: Finished difference Result 31427 states and 47845 transitions. [2020-10-28 19:10:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:53,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-10-28 19:10:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:53,428 INFO L225 Difference]: With dead ends: 31427 [2020-10-28 19:10:53,428 INFO L226 Difference]: Without dead ends: 21944 [2020-10-28 19:10:53,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21944 states. [2020-10-28 19:10:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21944 to 21941. [2020-10-28 19:10:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21941 states. [2020-10-28 19:10:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21941 states to 21941 states and 33236 transitions. [2020-10-28 19:10:55,083 INFO L78 Accepts]: Start accepts. Automaton has 21941 states and 33236 transitions. Word has length 88 [2020-10-28 19:10:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:55,083 INFO L481 AbstractCegarLoop]: Abstraction has 21941 states and 33236 transitions. [2020-10-28 19:10:55,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 21941 states and 33236 transitions. [2020-10-28 19:10:55,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 19:10:55,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:55,092 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:55,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:10:55,093 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash -724734315, now seen corresponding path program 1 times [2020-10-28 19:10:55,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:55,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780614865] [2020-10-28 19:10:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:55,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:55,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:55,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:55,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:55,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:55,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:00,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:00,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 19:11:00,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:11:00,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 19:11:00,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:00,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:00,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:11:00,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-28 19:11:00,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 19:11:00,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:00,479 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:11:00,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:11:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:00,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:00,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:00,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:11:00,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:11:00,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 19:11:00,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:00,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:11:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:11:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:11:00,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:11:00,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780614865] [2020-10-28 19:11:00,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:11:00,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:11:00,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988497824] [2020-10-28 19:11:00,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:11:00,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:11:00,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:11:00,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:11:00,593 INFO L87 Difference]: Start difference. First operand 21941 states and 33236 transitions. Second operand 4 states. [2020-10-28 19:11:00,937 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:11:04,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:11:04,033 INFO L93 Difference]: Finished difference Result 63963 states and 96728 transitions. [2020-10-28 19:11:04,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:11:04,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 19:11:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:11:04,120 INFO L225 Difference]: With dead ends: 63963 [2020-10-28 19:11:04,120 INFO L226 Difference]: Without dead ends: 42072 [2020-10-28 19:11:04,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:11:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42072 states. [2020-10-28 19:11:06,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42072 to 42069. [2020-10-28 19:11:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42069 states. [2020-10-28 19:11:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42069 states to 42069 states and 63220 transitions. [2020-10-28 19:11:07,051 INFO L78 Accepts]: Start accepts. Automaton has 42069 states and 63220 transitions. Word has length 117 [2020-10-28 19:11:07,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:11:07,052 INFO L481 AbstractCegarLoop]: Abstraction has 42069 states and 63220 transitions. [2020-10-28 19:11:07,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:11:07,052 INFO L276 IsEmpty]: Start isEmpty. Operand 42069 states and 63220 transitions. [2020-10-28 19:11:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 19:11:07,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:11:07,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:11:07,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:11:07,065 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:11:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:11:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1435754198, now seen corresponding path program 1 times [2020-10-28 19:11:07,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:11:07,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562890005] [2020-10-28 19:11:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:11:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:07,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:07,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:07,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:07,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:07,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:07,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:09,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:12,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:12,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 19:11:12,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:11:12,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:11:12,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:12,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:12,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:11:12,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-28 19:11:12,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 19:11:12,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:12,434 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:11:12,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:11:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:12,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:12,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:12,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:11:12,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:11:12,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:11:12,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:12,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:12,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:11:12,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:11:12,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:11:12,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:11:12,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562890005] [2020-10-28 19:11:12,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:11:12,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:11:12,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87311789] [2020-10-28 19:11:12,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:11:12,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:11:12,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:11:12,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:11:12,485 INFO L87 Difference]: Start difference. First operand 42069 states and 63220 transitions. Second operand 4 states. [2020-10-28 19:11:12,848 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:11:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:11:17,773 INFO L93 Difference]: Finished difference Result 122587 states and 183800 transitions. [2020-10-28 19:11:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:11:17,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 19:11:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:11:17,888 INFO L225 Difference]: With dead ends: 122587 [2020-10-28 19:11:17,888 INFO L226 Difference]: Without dead ends: 80568 [2020-10-28 19:11:17,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:11:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80568 states. [2020-10-28 19:11:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80568 to 80565. [2020-10-28 19:11:23,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80565 states. [2020-10-28 19:11:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80565 states to 80565 states and 119988 transitions. [2020-10-28 19:11:23,884 INFO L78 Accepts]: Start accepts. Automaton has 80565 states and 119988 transitions. Word has length 117 [2020-10-28 19:11:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:11:23,884 INFO L481 AbstractCegarLoop]: Abstraction has 80565 states and 119988 transitions. [2020-10-28 19:11:23,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:11:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 80565 states and 119988 transitions. [2020-10-28 19:11:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 19:11:23,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:11:23,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:11:23,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:11:23,907 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:11:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:11:23,907 INFO L82 PathProgramCache]: Analyzing trace with hash -771254675, now seen corresponding path program 1 times [2020-10-28 19:11:23,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:11:23,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925911684] [2020-10-28 19:11:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:11:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:23,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:23,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:24,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:24,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:24,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:24,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:25,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:28,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:28,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 19:11:28,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:11:28,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 19:11:28,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:28,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:28,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:11:28,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-28 19:11:28,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 19:11:28,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:29,275 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:11:29,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:11:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:29,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:29,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:29,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:11:29,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:11:29,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:11:29,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:29,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:29,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:11:29,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:11:29,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:11:29,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:11:29,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925911684] [2020-10-28 19:11:29,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:11:29,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:11:29,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182292533] [2020-10-28 19:11:29,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:11:29,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:11:29,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:11:29,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:11:29,322 INFO L87 Difference]: Start difference. First operand 80565 states and 119988 transitions. Second operand 4 states. [2020-10-28 19:11:29,683 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:11:39,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:11:39,551 INFO L93 Difference]: Finished difference Result 234555 states and 348344 transitions. [2020-10-28 19:11:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:11:39,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 19:11:39,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:11:39,787 INFO L225 Difference]: With dead ends: 234555 [2020-10-28 19:11:39,787 INFO L226 Difference]: Without dead ends: 154040 [2020-10-28 19:11:39,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:11:40,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154040 states. [2020-10-28 19:11:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154040 to 154037. [2020-10-28 19:11:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154037 states. [2020-10-28 19:11:50,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154037 states to 154037 states and 227124 transitions. [2020-10-28 19:11:50,234 INFO L78 Accepts]: Start accepts. Automaton has 154037 states and 227124 transitions. Word has length 117 [2020-10-28 19:11:50,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:11:50,235 INFO L481 AbstractCegarLoop]: Abstraction has 154037 states and 227124 transitions. [2020-10-28 19:11:50,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:11:50,235 INFO L276 IsEmpty]: Start isEmpty. Operand 154037 states and 227124 transitions. [2020-10-28 19:11:50,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 19:11:50,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:11:50,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:11:50,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:11:50,267 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:11:50,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:11:50,268 INFO L82 PathProgramCache]: Analyzing trace with hash 23090261, now seen corresponding path program 1 times [2020-10-28 19:11:50,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:11:50,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000997065] [2020-10-28 19:11:50,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:11:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:50,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:50,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:50,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:50,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:50,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:52,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:54,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:55,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:55,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 19:11:55,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:11:55,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 19:11:55,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:55,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:55,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:11:55,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 19:11:55,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 19:11:55,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:55,646 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:11:55,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:11:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:55,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:55,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:55,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:11:55,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:11:55,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 19:11:55,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:55,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:55,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:11:55,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:11:55,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:11:55,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:11:55,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000997065] [2020-10-28 19:11:55,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:11:55,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:11:55,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131420064] [2020-10-28 19:11:55,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:11:55,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:11:55,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:11:55,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:11:55,680 INFO L87 Difference]: Start difference. First operand 154037 states and 227124 transitions. Second operand 4 states. [2020-10-28 19:11:56,036 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:12:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:12:14,610 INFO L93 Difference]: Finished difference Result 447931 states and 658232 transitions. [2020-10-28 19:12:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:12:14,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 19:12:14,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:12:15,343 INFO L225 Difference]: With dead ends: 447931 [2020-10-28 19:12:15,343 INFO L226 Difference]: Without dead ends: 293944 [2020-10-28 19:12:15,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:12:15,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293944 states. [2020-10-28 19:12:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293944 to 293941. [2020-10-28 19:12:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293941 states. [2020-10-28 19:12:35,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293941 states to 293941 states and 428596 transitions. [2020-10-28 19:12:35,258 INFO L78 Accepts]: Start accepts. Automaton has 293941 states and 428596 transitions. Word has length 117 [2020-10-28 19:12:35,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:12:35,258 INFO L481 AbstractCegarLoop]: Abstraction has 293941 states and 428596 transitions. [2020-10-28 19:12:35,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:12:35,259 INFO L276 IsEmpty]: Start isEmpty. Operand 293941 states and 428596 transitions. [2020-10-28 19:12:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 19:12:35,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:12:35,293 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:12:35,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:12:35,293 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:12:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:12:35,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1973010666, now seen corresponding path program 1 times [2020-10-28 19:12:35,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:12:35,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400093831] [2020-10-28 19:12:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:12:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:12:35,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:35,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:35,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:35,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:36,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:36,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:38,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:40,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:12:40,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 19:12:40,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:12:40,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 19:12:40,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:12:40,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:12:40,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:12:40,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 19:12:40,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 19:12:40,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:12:40,665 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:12:40,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:12:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:12:40,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:40,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:12:40,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:12:40,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:12:40,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:12:40,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:12:40,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:12:40,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:12:40,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:12:40,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:12:40,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:12:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:12:40,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400093831] [2020-10-28 19:12:40,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:12:40,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:12:40,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258934782] [2020-10-28 19:12:40,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:12:40,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:12:40,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:12:40,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:12:40,706 INFO L87 Difference]: Start difference. First operand 293941 states and 428596 transitions. Second operand 4 states. [2020-10-28 19:12:41,065 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:13:16,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:16,957 INFO L93 Difference]: Finished difference Result 853563 states and 1239608 transitions. [2020-10-28 19:13:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:13:16,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 19:13:16,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:18,193 INFO L225 Difference]: With dead ends: 853563 [2020-10-28 19:13:18,193 INFO L226 Difference]: Without dead ends: 559672 [2020-10-28 19:13:18,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:18,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559672 states.