/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:16:08,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:16:08,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:16:08,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:16:08,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:16:08,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:16:08,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:16:08,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:16:08,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:16:08,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:16:08,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:16:08,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:16:08,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:16:08,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:16:08,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:16:08,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:16:08,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:16:08,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:16:08,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:16:08,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:16:08,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:16:08,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:16:08,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:16:08,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:16:08,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:16:08,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:16:08,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:16:08,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:16:08,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:16:08,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:16:08,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:16:08,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:16:08,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:16:08,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:16:08,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:16:08,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:16:08,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:16:08,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:16:08,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:16:08,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:16:08,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:16:08,852 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 [2020-10-29 13:16:08,906 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:16:08,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:16:08,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:16:08,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:16:08,912 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:16:08,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:16:08,912 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:16:08,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:16:08,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:16:08,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:16:08,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:16:08,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:16:08,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:16:08,914 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:16:08,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:16:08,915 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:16:08,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:16:08,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:16:08,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:16:08,916 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:16:08,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:16:08,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:16:08,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:16:08,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:16:08,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:16:08,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:16:08,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:16:08,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:16:08,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:16:08,918 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:16:09,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:16:09,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:16:09,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:16:09,395 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:16:09,396 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:16:09,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:16:09,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2ba51ae1/7bbdfdd6c994404db236e02484a1fb13/FLAG45b55988e [2020-10-29 13:16:10,224 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:16:10,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:16:10,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2ba51ae1/7bbdfdd6c994404db236e02484a1fb13/FLAG45b55988e [2020-10-29 13:16:10,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2ba51ae1/7bbdfdd6c994404db236e02484a1fb13 [2020-10-29 13:16:10,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:16:10,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:16:10,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:16:10,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:16:10,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:16:10,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:16:10" (1/1) ... [2020-10-29 13:16:10,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb857b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:16:10, skipping insertion in model container [2020-10-29 13:16:10,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:16:10" (1/1) ... [2020-10-29 13:16:10,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:16:10,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:16:11,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:16:11,255 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:16:11,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:16:11,588 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:16:11,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:16:11 WrapperNode [2020-10-29 13:16:11,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:16:11,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:16:11,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:16:11,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:16:11,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:16:11" (1/1) ... [2020-10-29 13:16:11,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:16:11" (1/1) ... [2020-10-29 13:16:11,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:16:11" (1/1) ... [2020-10-29 13:16:11,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:16:11" (1/1) ... [2020-10-29 13:16:11,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:16:11" (1/1) ... [2020-10-29 13:16:11,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:16:11" (1/1) ... [2020-10-29 13:16:11,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:16:11" (1/1) ... [2020-10-29 13:16:11,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:16:11,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:16:11,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:16:11,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:16:11,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:16:11" (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 [2020-10-29 13:16:11,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:16:11,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:16:11,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:16:11,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:16:11,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:16:11,868 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:16:11,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:16:11,869 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:16:11,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:16:11,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:16:11,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:16:11,871 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:16:11,871 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:16:11,871 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:16:11,871 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:16:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:16:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:16:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:16:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:16:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:16:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:16:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:16:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:16:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:16:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:16:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:16:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:16:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:16:13,816 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:16:13,817 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:16:13,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:16:13 BoogieIcfgContainer [2020-10-29 13:16:13,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:16:13,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:16:13,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:16:13,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:16:13,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:16:10" (1/3) ... [2020-10-29 13:16:13,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739ed191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:16:13, skipping insertion in model container [2020-10-29 13:16:13,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:16:11" (2/3) ... [2020-10-29 13:16:13,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739ed191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:16:13, skipping insertion in model container [2020-10-29 13:16:13,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:16:13" (3/3) ... [2020-10-29 13:16:13,830 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:16:13,844 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:16:13,850 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:16:13,866 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:16:13,897 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:16:13,898 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:16:13,898 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:16:13,898 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:16:13,898 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:16:13,898 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:16:13,898 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:16:13,898 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:16:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states. [2020-10-29 13:16:13,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 13:16:13,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:13,943 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] [2020-10-29 13:16:13,943 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:13,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:13,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1822577129, now seen corresponding path program 1 times [2020-10-29 13:16:13,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:13,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264976345] [2020-10-29 13:16:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:14,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:14,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:14,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:16,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:16,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:17,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:17,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:17,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:17,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:18,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:19,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:19,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 13:16:19,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:16:19,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 13:16:19,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:19,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:19,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:19,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:16:19,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:16:19,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:16:20,211 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:16:20,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:20,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:20,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:20,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:20,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:20,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-29 13:16:20,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:20,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:20,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:20,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:20,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:16:20,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:16:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:20,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264976345] [2020-10-29 13:16:20,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:20,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:16:20,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136115603] [2020-10-29 13:16:20,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:20,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:20,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:20,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:20,369 INFO L87 Difference]: Start difference. First operand 367 states. Second operand 6 states. [2020-10-29 13:16:21,565 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 256 DAG size of output: 255 [2020-10-29 13:16:23,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:23,972 INFO L93 Difference]: Finished difference Result 573 states and 998 transitions. [2020-10-29 13:16:23,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:16:23,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-29 13:16:23,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:24,005 INFO L225 Difference]: With dead ends: 573 [2020-10-29 13:16:24,006 INFO L226 Difference]: Without dead ends: 310 [2020-10-29 13:16:24,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:16:24,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-29 13:16:24,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2020-10-29 13:16:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-29 13:16:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 393 transitions. [2020-10-29 13:16:24,148 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 393 transitions. Word has length 64 [2020-10-29 13:16:24,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:24,151 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 393 transitions. [2020-10-29 13:16:24,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 393 transitions. [2020-10-29 13:16:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:16:24,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:24,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:24,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:16:24,158 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:24,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1267835222, now seen corresponding path program 1 times [2020-10-29 13:16:24,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:24,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857256621] [2020-10-29 13:16:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:24,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:24,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:24,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:24,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:24,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:24,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:25,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:25,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:29,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:29,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:16:29,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:16:29,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:16:29,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:29,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:29,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:29,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:16:29,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:16:29,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:16:29,920 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:16:29,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:29,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:29,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:29,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:29,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:29,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-29 13:16:29,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:29,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:30,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:30,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:30,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:16:30,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:16:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:30,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857256621] [2020-10-29 13:16:30,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:30,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:16:30,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409153405] [2020-10-29 13:16:30,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:30,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:30,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:30,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:30,047 INFO L87 Difference]: Start difference. First operand 310 states and 393 transitions. Second operand 6 states. [2020-10-29 13:16:30,602 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:16:32,265 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:16:32,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:32,662 INFO L93 Difference]: Finished difference Result 620 states and 819 transitions. [2020-10-29 13:16:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:16:32,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-29 13:16:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:32,669 INFO L225 Difference]: With dead ends: 620 [2020-10-29 13:16:32,669 INFO L226 Difference]: Without dead ends: 394 [2020-10-29 13:16:32,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:16:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-29 13:16:32,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 357. [2020-10-29 13:16:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-29 13:16:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 473 transitions. [2020-10-29 13:16:32,732 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 473 transitions. Word has length 65 [2020-10-29 13:16:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:32,732 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 473 transitions. [2020-10-29 13:16:32,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 473 transitions. [2020-10-29 13:16:32,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:16:32,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:32,741 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] [2020-10-29 13:16:32,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:16:32,741 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:32,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1064722283, now seen corresponding path program 1 times [2020-10-29 13:16:32,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:32,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833155420] [2020-10-29 13:16:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:32,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:32,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:32,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:33,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:33,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:33,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:33,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:34,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:35,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:36,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:36,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:37,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:16:37,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:16:37,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:16:37,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:37,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:37,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:37,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:16:37,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:16:37,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:16:38,336 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:16:38,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:38,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:38,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:38,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:38,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:38,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-29 13:16:38,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:38,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:38,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:38,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:38,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:16:38,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:16:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:38,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833155420] [2020-10-29 13:16:38,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:38,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:16:38,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612151106] [2020-10-29 13:16:38,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:38,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:38,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:38,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:38,430 INFO L87 Difference]: Start difference. First operand 357 states and 473 transitions. Second operand 6 states. [2020-10-29 13:16:38,972 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:16:40,512 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:16:40,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:40,915 INFO L93 Difference]: Finished difference Result 825 states and 1135 transitions. [2020-10-29 13:16:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:16:40,917 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-29 13:16:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:40,926 INFO L225 Difference]: With dead ends: 825 [2020-10-29 13:16:40,926 INFO L226 Difference]: Without dead ends: 530 [2020-10-29 13:16:40,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:16:40,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-10-29 13:16:40,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 505. [2020-10-29 13:16:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-29 13:16:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 699 transitions. [2020-10-29 13:16:40,982 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 699 transitions. Word has length 66 [2020-10-29 13:16:40,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:40,986 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 699 transitions. [2020-10-29 13:16:40,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:40,986 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 699 transitions. [2020-10-29 13:16:41,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:16:41,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:41,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:41,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:16:41,005 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:41,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:41,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1589400918, now seen corresponding path program 1 times [2020-10-29 13:16:41,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:41,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112084278] [2020-10-29 13:16:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:41,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:41,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:41,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:41,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:41,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:43,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:43,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:45,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:45,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:45,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:46,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:46,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:16:46,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:16:46,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 13:16:46,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:46,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:46,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:16:46,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:16:46,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:16:46,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:16:46,650 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:16:46,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:46,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:46,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:46,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:46,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:46,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:16:46,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:46,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:46,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:46,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:46,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:46,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:46,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112084278] [2020-10-29 13:16:46,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:46,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:16:46,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731797282] [2020-10-29 13:16:46,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:16:46,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:46,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:16:46,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:16:46,721 INFO L87 Difference]: Start difference. First operand 505 states and 699 transitions. Second operand 7 states. [2020-10-29 13:16:47,320 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 257 [2020-10-29 13:16:48,748 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:16:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:49,358 INFO L93 Difference]: Finished difference Result 1114 states and 1562 transitions. [2020-10-29 13:16:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:16:49,359 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-29 13:16:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:49,364 INFO L225 Difference]: With dead ends: 1114 [2020-10-29 13:16:49,364 INFO L226 Difference]: Without dead ends: 783 [2020-10-29 13:16:49,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:16:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2020-10-29 13:16:49,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 505. [2020-10-29 13:16:49,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-29 13:16:49,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 698 transitions. [2020-10-29 13:16:49,416 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 698 transitions. Word has length 67 [2020-10-29 13:16:49,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:49,416 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 698 transitions. [2020-10-29 13:16:49,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:16:49,417 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 698 transitions. [2020-10-29 13:16:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:16:49,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:49,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:49,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:16:49,419 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:49,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:49,419 INFO L82 PathProgramCache]: Analyzing trace with hash 993484444, now seen corresponding path program 1 times [2020-10-29 13:16:49,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:49,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231331205] [2020-10-29 13:16:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:49,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:49,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:49,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:49,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:50,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:50,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:50,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:51,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:52,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:52,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:53,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:53,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:54,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:54,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:54,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:54,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:16:54,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:16:54,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:16:54,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:54,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:54,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:16:54,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:16:54,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:16:54,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:55,168 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:16:55,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:55,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:55,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:55,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:55,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:55,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:16:55,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:55,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:55,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:55,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:55,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:55,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:16:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:55,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231331205] [2020-10-29 13:16:55,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:55,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:16:55,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480899656] [2020-10-29 13:16:55,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:16:55,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:55,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:16:55,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:16:55,227 INFO L87 Difference]: Start difference. First operand 505 states and 698 transitions. Second operand 8 states. [2020-10-29 13:16:55,788 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-29 13:16:57,374 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:16:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:58,456 INFO L93 Difference]: Finished difference Result 968 states and 1378 transitions. [2020-10-29 13:16:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:16:58,457 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-29 13:16:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:58,463 INFO L225 Difference]: With dead ends: 968 [2020-10-29 13:16:58,463 INFO L226 Difference]: Without dead ends: 962 [2020-10-29 13:16:58,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:16:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2020-10-29 13:16:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 505. [2020-10-29 13:16:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-29 13:16:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 696 transitions. [2020-10-29 13:16:58,519 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 696 transitions. Word has length 67 [2020-10-29 13:16:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:58,520 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 696 transitions. [2020-10-29 13:16:58,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:16:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 696 transitions. [2020-10-29 13:16:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:16:58,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:58,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:58,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:16:58,522 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:58,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:58,522 INFO L82 PathProgramCache]: Analyzing trace with hash 115748410, now seen corresponding path program 1 times [2020-10-29 13:16:58,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:58,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891755038] [2020-10-29 13:16:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:58,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:58,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:58,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:58,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:59,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:59,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:00,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:01,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:01,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:01,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:01,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:03,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:03,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:03,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:17:03,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:17:03,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:17:03,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:03,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:03,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:17:03,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:17:03,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:17:03,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:04,180 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:17:04,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:04,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:04,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:04,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:04,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:04,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:17:04,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:04,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:04,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:04,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:04,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:04,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:04,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891755038] [2020-10-29 13:17:04,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:04,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:17:04,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778084058] [2020-10-29 13:17:04,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:17:04,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:04,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:17:04,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:17:04,241 INFO L87 Difference]: Start difference. First operand 505 states and 696 transitions. Second operand 8 states. [2020-10-29 13:17:04,787 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2020-10-29 13:17:06,055 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-10-29 13:17:06,662 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 257 [2020-10-29 13:17:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:07,083 INFO L93 Difference]: Finished difference Result 966 states and 1371 transitions. [2020-10-29 13:17:07,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:17:07,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-29 13:17:07,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:07,088 INFO L225 Difference]: With dead ends: 966 [2020-10-29 13:17:07,088 INFO L226 Difference]: Without dead ends: 654 [2020-10-29 13:17:07,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:17:07,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2020-10-29 13:17:07,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 400. [2020-10-29 13:17:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-29 13:17:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 547 transitions. [2020-10-29 13:17:07,133 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 547 transitions. Word has length 67 [2020-10-29 13:17:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:07,134 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 547 transitions. [2020-10-29 13:17:07,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:17:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 547 transitions. [2020-10-29 13:17:07,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:17:07,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:07,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:07,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:17:07,135 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:07,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:07,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1588160769, now seen corresponding path program 1 times [2020-10-29 13:17:07,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:07,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166139782] [2020-10-29 13:17:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:07,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:07,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:07,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:07,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:07,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:07,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:09,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:09,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:09,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:09,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:10,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:11,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:11,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:11,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:11,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:11,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:11,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:12,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:12,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:17:12,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:17:12,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:17:12,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:12,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:12,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:17:12,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:17:12,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:17:12,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:12,955 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:17:12,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:12,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:12,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:12,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:12,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:12,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:17:12,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:12,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:12,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:12,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:12,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:12,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:17:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:13,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166139782] [2020-10-29 13:17:13,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:13,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:17:13,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928901226] [2020-10-29 13:17:13,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:17:13,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:13,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:17:13,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:17:13,031 INFO L87 Difference]: Start difference. First operand 400 states and 547 transitions. Second operand 8 states. [2020-10-29 13:17:13,600 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-29 13:17:14,928 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:17:15,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:15,978 INFO L93 Difference]: Finished difference Result 850 states and 1214 transitions. [2020-10-29 13:17:15,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:17:15,978 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-29 13:17:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:15,983 INFO L225 Difference]: With dead ends: 850 [2020-10-29 13:17:15,984 INFO L226 Difference]: Without dead ends: 844 [2020-10-29 13:17:15,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:17:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-10-29 13:17:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 400. [2020-10-29 13:17:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-29 13:17:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 546 transitions. [2020-10-29 13:17:16,031 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 546 transitions. Word has length 69 [2020-10-29 13:17:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:16,031 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 546 transitions. [2020-10-29 13:17:16,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:17:16,031 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 546 transitions. [2020-10-29 13:17:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:17:16,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:16,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:16,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:17:16,033 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:16,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:16,033 INFO L82 PathProgramCache]: Analyzing trace with hash -639750942, now seen corresponding path program 1 times [2020-10-29 13:17:16,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:16,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813607116] [2020-10-29 13:17:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:16,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:16,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:16,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:16,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:16,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:16,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:17,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:17,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:18,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:18,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:18,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:18,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:18,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:18,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:18,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:19,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:19,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:21,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:21,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:17:21,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:17:21,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:17:21,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:21,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:17:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:17:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:17:21,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:21,613 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:17:21,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:21,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:21,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:21,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:21,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:21,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:17:21,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:21,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:21,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:21,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:21,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:21,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:21,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813607116] [2020-10-29 13:17:21,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:21,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:17:21,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783797435] [2020-10-29 13:17:21,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:17:21,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:21,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:17:21,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:17:21,670 INFO L87 Difference]: Start difference. First operand 400 states and 546 transitions. Second operand 8 states. [2020-10-29 13:17:22,250 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-29 13:17:23,508 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:17:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:24,530 INFO L93 Difference]: Finished difference Result 853 states and 1216 transitions. [2020-10-29 13:17:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:17:24,531 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-29 13:17:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:24,538 INFO L225 Difference]: With dead ends: 853 [2020-10-29 13:17:24,538 INFO L226 Difference]: Without dead ends: 836 [2020-10-29 13:17:24,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:17:24,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2020-10-29 13:17:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 400. [2020-10-29 13:17:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-29 13:17:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 545 transitions. [2020-10-29 13:17:24,592 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 545 transitions. Word has length 69 [2020-10-29 13:17:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:24,592 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 545 transitions. [2020-10-29 13:17:24,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:17:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 545 transitions. [2020-10-29 13:17:24,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:17:24,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:24,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:24,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:17:24,594 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:24,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:24,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1523499693, now seen corresponding path program 1 times [2020-10-29 13:17:24,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:24,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850150401] [2020-10-29 13:17:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:24,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:24,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:25,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:25,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:25,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:29,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:29,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:17:29,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:17:29,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:17:29,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:29,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:29,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:17:29,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:17:29,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:17:29,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:30,204 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:17:30,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:30,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:30,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:30,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:30,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:30,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:17:30,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:30,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:30,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:30,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:30,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:30,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:30,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850150401] [2020-10-29 13:17:30,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:30,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:17:30,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887215066] [2020-10-29 13:17:30,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:17:30,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:30,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:17:30,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:17:30,252 INFO L87 Difference]: Start difference. First operand 400 states and 545 transitions. Second operand 9 states. [2020-10-29 13:17:30,836 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:17:32,269 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:17:32,800 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-10-29 13:17:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:33,262 INFO L93 Difference]: Finished difference Result 734 states and 1042 transitions. [2020-10-29 13:17:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:17:33,263 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-29 13:17:33,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:33,266 INFO L225 Difference]: With dead ends: 734 [2020-10-29 13:17:33,267 INFO L226 Difference]: Without dead ends: 522 [2020-10-29 13:17:33,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:17:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-10-29 13:17:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 391. [2020-10-29 13:17:33,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-10-29 13:17:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 530 transitions. [2020-10-29 13:17:33,318 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 530 transitions. Word has length 69 [2020-10-29 13:17:33,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:33,319 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 530 transitions. [2020-10-29 13:17:33,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:17:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 530 transitions. [2020-10-29 13:17:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:17:33,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:33,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:33,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:17:33,321 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:33,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:33,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1697015220, now seen corresponding path program 1 times [2020-10-29 13:17:33,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:33,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804542141] [2020-10-29 13:17:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:33,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:33,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:33,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:33,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:34,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:34,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:34,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:34,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:34,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:35,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:35,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:35,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:35,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:37,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:38,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:38,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:17:38,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:17:38,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:17:38,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:38,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:38,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:17:38,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:17:38,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:17:38,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:38,936 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:17:38,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:38,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:38,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:38,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:38,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:38,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:17:38,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:38,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:38,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:38,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:38,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:38,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:38,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804542141] [2020-10-29 13:17:38,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:38,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:17:38,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492715675] [2020-10-29 13:17:38,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:17:38,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:38,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:17:38,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:17:38,972 INFO L87 Difference]: Start difference. First operand 391 states and 530 transitions. Second operand 8 states. [2020-10-29 13:17:39,613 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-29 13:17:41,047 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:17:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:41,535 INFO L93 Difference]: Finished difference Result 530 states and 724 transitions. [2020-10-29 13:17:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:17:41,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:17:41,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:41,541 INFO L225 Difference]: With dead ends: 530 [2020-10-29 13:17:41,541 INFO L226 Difference]: Without dead ends: 522 [2020-10-29 13:17:41,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:17:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-10-29 13:17:41,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 391. [2020-10-29 13:17:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-10-29 13:17:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 529 transitions. [2020-10-29 13:17:41,592 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 529 transitions. Word has length 70 [2020-10-29 13:17:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:41,592 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 529 transitions. [2020-10-29 13:17:41,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:17:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 529 transitions. [2020-10-29 13:17:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:17:41,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:41,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:41,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:17:41,594 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:41,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:41,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1600118731, now seen corresponding path program 1 times [2020-10-29 13:17:41,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:41,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438683666] [2020-10-29 13:17:41,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:41,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:41,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:41,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:42,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:42,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:46,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:46,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:17:46,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:17:46,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:17:46,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:46,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:46,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:17:46,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:17:46,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:17:46,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:47,159 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:17:47,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:47,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:47,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:47,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:47,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:47,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:17:47,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:47,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:47,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:47,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:47,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:47,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:47,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438683666] [2020-10-29 13:17:47,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:47,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:17:47,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390949188] [2020-10-29 13:17:47,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:17:47,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:47,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:17:47,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:17:47,207 INFO L87 Difference]: Start difference. First operand 391 states and 529 transitions. Second operand 8 states. [2020-10-29 13:17:47,791 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-29 13:17:49,072 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:17:49,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:49,975 INFO L93 Difference]: Finished difference Result 1066 states and 1533 transitions. [2020-10-29 13:17:49,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:17:49,975 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:17:49,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:49,980 INFO L225 Difference]: With dead ends: 1066 [2020-10-29 13:17:49,980 INFO L226 Difference]: Without dead ends: 830 [2020-10-29 13:17:49,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:17:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2020-10-29 13:17:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 391. [2020-10-29 13:17:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-10-29 13:17:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 527 transitions. [2020-10-29 13:17:50,037 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 527 transitions. Word has length 70 [2020-10-29 13:17:50,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:50,037 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 527 transitions. [2020-10-29 13:17:50,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:17:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 527 transitions. [2020-10-29 13:17:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:17:50,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:50,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:50,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:17:50,039 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1862872517, now seen corresponding path program 1 times [2020-10-29 13:17:50,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:50,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421273454] [2020-10-29 13:17:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:50,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:50,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:50,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:50,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:50,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:50,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:50,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:51,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:51,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:51,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:51,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:52,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:52,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:52,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:52,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:53,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:54,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:55,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:55,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:17:55,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:17:55,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:17:55,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:55,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:17:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:17:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:17:55,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:55,623 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:17:55,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:55,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:55,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:55,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:55,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:55,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 13:17:55,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:55,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:55,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:17:55,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:55,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:17:55,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:55,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421273454] [2020-10-29 13:17:55,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:55,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:17:55,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788229068] [2020-10-29 13:17:55,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:17:55,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:55,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:17:55,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:17:55,694 INFO L87 Difference]: Start difference. First operand 391 states and 527 transitions. Second operand 8 states. [2020-10-29 13:17:56,232 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-29 13:17:57,511 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2020-10-29 13:17:58,605 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:17:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:58,778 INFO L93 Difference]: Finished difference Result 1800 states and 2595 transitions. [2020-10-29 13:17:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:17:58,778 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-29 13:17:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:58,785 INFO L225 Difference]: With dead ends: 1800 [2020-10-29 13:17:58,785 INFO L226 Difference]: Without dead ends: 1481 [2020-10-29 13:17:58,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:17:58,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2020-10-29 13:17:58,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 401. [2020-10-29 13:17:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-29 13:17:58,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 534 transitions. [2020-10-29 13:17:58,853 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 534 transitions. Word has length 71 [2020-10-29 13:17:58,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:58,854 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 534 transitions. [2020-10-29 13:17:58,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:17:58,854 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 534 transitions. [2020-10-29 13:17:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:17:58,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:58,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:58,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:17:58,855 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash 500841239, now seen corresponding path program 1 times [2020-10-29 13:17:58,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:58,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873644435] [2020-10-29 13:17:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:58,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:58,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:59,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:00,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:00,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:18:00,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:18:00,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1734 [2020-10-29 13:18:00,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:00,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:00,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:18:00,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:18:00,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:18:00,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:01,199 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:18:01,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:01,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:01,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:01,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:01,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:01,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:18:01,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:01,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:01,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:01,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:01,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:01,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:01,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873644435] [2020-10-29 13:18:01,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:01,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:18:01,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420085469] [2020-10-29 13:18:01,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:18:01,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:01,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:18:01,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:18:01,237 INFO L87 Difference]: Start difference. First operand 401 states and 534 transitions. Second operand 9 states. [2020-10-29 13:18:01,764 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2020-10-29 13:18:03,217 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-10-29 13:18:03,770 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 257 [2020-10-29 13:18:04,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:04,648 INFO L93 Difference]: Finished difference Result 834 states and 1176 transitions. [2020-10-29 13:18:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:18:04,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:18:04,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:04,652 INFO L225 Difference]: With dead ends: 834 [2020-10-29 13:18:04,653 INFO L226 Difference]: Without dead ends: 827 [2020-10-29 13:18:04,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:18:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-10-29 13:18:04,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 396. [2020-10-29 13:18:04,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-29 13:18:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 525 transitions. [2020-10-29 13:18:04,720 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 525 transitions. Word has length 72 [2020-10-29 13:18:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:04,720 INFO L481 AbstractCegarLoop]: Abstraction has 396 states and 525 transitions. [2020-10-29 13:18:04,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:18:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 525 transitions. [2020-10-29 13:18:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:18:04,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:04,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:04,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:18:04,722 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:04,723 INFO L82 PathProgramCache]: Analyzing trace with hash -763659939, now seen corresponding path program 1 times [2020-10-29 13:18:04,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:04,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51148243] [2020-10-29 13:18:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:04,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:04,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:05,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:05,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:18:05,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:18:05,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1115 [2020-10-29 13:18:05,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:05,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:05,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:18:05,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:18:05,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:18:05,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:06,604 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:18:06,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:06,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:06,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:06,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:06,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:06,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:18:06,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:06,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:06,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:06,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:06,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:06,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:06,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51148243] [2020-10-29 13:18:06,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:06,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:18:06,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879846879] [2020-10-29 13:18:06,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:18:06,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:06,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:18:06,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:18:06,649 INFO L87 Difference]: Start difference. First operand 396 states and 525 transitions. Second operand 9 states. [2020-10-29 13:18:07,262 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-10-29 13:18:08,646 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 264 [2020-10-29 13:18:09,683 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-10-29 13:18:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:09,729 INFO L93 Difference]: Finished difference Result 813 states and 1148 transitions. [2020-10-29 13:18:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:18:09,729 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:18:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:09,732 INFO L225 Difference]: With dead ends: 813 [2020-10-29 13:18:09,732 INFO L226 Difference]: Without dead ends: 800 [2020-10-29 13:18:09,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:18:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2020-10-29 13:18:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 385. [2020-10-29 13:18:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-29 13:18:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 511 transitions. [2020-10-29 13:18:09,806 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 511 transitions. Word has length 72 [2020-10-29 13:18:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:09,806 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 511 transitions. [2020-10-29 13:18:09,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:18:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 511 transitions. [2020-10-29 13:18:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:18:09,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:09,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:09,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:18:09,808 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:09,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1984746052, now seen corresponding path program 1 times [2020-10-29 13:18:09,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:09,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923944513] [2020-10-29 13:18:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:09,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:10,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:10,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:10,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:11,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:14,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:14,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:18:14,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:18:14,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4285 [2020-10-29 13:18:14,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:14,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:14,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:18:14,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:18:14,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:18:14,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:14,725 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:18:14,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:14,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:14,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:14,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:14,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:14,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:18:14,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:14,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:14,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:14,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923944513] [2020-10-29 13:18:14,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:14,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:18:14,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136829080] [2020-10-29 13:18:14,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:18:14,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:14,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:18:14,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:18:14,766 INFO L87 Difference]: Start difference. First operand 385 states and 511 transitions. Second operand 9 states. [2020-10-29 13:18:15,346 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2020-10-29 13:18:17,331 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:18:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:17,382 INFO L93 Difference]: Finished difference Result 828 states and 1166 transitions. [2020-10-29 13:18:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:18:17,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:18:17,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:17,385 INFO L225 Difference]: With dead ends: 828 [2020-10-29 13:18:17,385 INFO L226 Difference]: Without dead ends: 591 [2020-10-29 13:18:17,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:18:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2020-10-29 13:18:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 355. [2020-10-29 13:18:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-29 13:18:17,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 473 transitions. [2020-10-29 13:18:17,459 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 473 transitions. Word has length 72 [2020-10-29 13:18:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:17,459 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 473 transitions. [2020-10-29 13:18:17,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:18:17,460 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 473 transitions. [2020-10-29 13:18:17,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 13:18:17,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:17,461 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:17,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:18:17,462 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:17,462 INFO L82 PathProgramCache]: Analyzing trace with hash 848127758, now seen corresponding path program 1 times [2020-10-29 13:18:17,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:17,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701521679] [2020-10-29 13:18:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:17,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:17,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:17,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:17,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:17,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:17,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:18,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:18,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:18,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:22,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:22,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 13:18:22,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:18:22,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:18:22,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:22,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:22,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:18:22,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:18:22,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:18:22,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:23,075 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:18:23,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:23,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:23,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:23,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:23,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:23,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:18:23,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:23,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:23,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:23,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:23,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:23,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:23,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701521679] [2020-10-29 13:18:23,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:23,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:18:23,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856458756] [2020-10-29 13:18:23,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:18:23,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:23,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:18:23,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:18:23,118 INFO L87 Difference]: Start difference. First operand 355 states and 473 transitions. Second operand 8 states. [2020-10-29 13:18:23,729 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-29 13:18:25,693 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:18:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:25,715 INFO L93 Difference]: Finished difference Result 696 states and 968 transitions. [2020-10-29 13:18:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:18:25,716 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 95 [2020-10-29 13:18:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:25,719 INFO L225 Difference]: With dead ends: 696 [2020-10-29 13:18:25,719 INFO L226 Difference]: Without dead ends: 465 [2020-10-29 13:18:25,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:18:25,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-29 13:18:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 355. [2020-10-29 13:18:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-29 13:18:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 469 transitions. [2020-10-29 13:18:25,792 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 469 transitions. Word has length 95 [2020-10-29 13:18:25,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:25,792 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 469 transitions. [2020-10-29 13:18:25,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:18:25,793 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 469 transitions. [2020-10-29 13:18:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-29 13:18:25,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:25,794 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:25,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:18:25,796 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash 368041575, now seen corresponding path program 1 times [2020-10-29 13:18:25,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:25,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243639058] [2020-10-29 13:18:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:25,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:25,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:25,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:25,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:26,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:26,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:26,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:26,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:26,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:26,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:30,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:30,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-29 13:18:30,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:18:30,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:18:30,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:30,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:18:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:18:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-29 13:18:30,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:31,401 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:18:31,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:31,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:31,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:31,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:31,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:31,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:18:31,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:31,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:31,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:31,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:31,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:31,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:31,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243639058] [2020-10-29 13:18:31,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:31,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:18:31,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509066270] [2020-10-29 13:18:31,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:18:31,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:31,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:18:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:31,444 INFO L87 Difference]: Start difference. First operand 355 states and 469 transitions. Second operand 7 states. [2020-10-29 13:18:32,048 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-10-29 13:18:33,586 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-29 13:18:34,151 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:18:34,689 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-29 13:18:35,242 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-29 13:18:35,779 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-29 13:18:36,318 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:18:36,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:36,517 INFO L93 Difference]: Finished difference Result 2011 states and 2949 transitions. [2020-10-29 13:18:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:18:36,518 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-29 13:18:36,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:36,527 INFO L225 Difference]: With dead ends: 2011 [2020-10-29 13:18:36,528 INFO L226 Difference]: Without dead ends: 1804 [2020-10-29 13:18:36,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:18:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2020-10-29 13:18:36,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 559. [2020-10-29 13:18:36,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-10-29 13:18:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 769 transitions. [2020-10-29 13:18:36,663 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 769 transitions. Word has length 97 [2020-10-29 13:18:36,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:36,663 INFO L481 AbstractCegarLoop]: Abstraction has 559 states and 769 transitions. [2020-10-29 13:18:36,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:18:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 769 transitions. [2020-10-29 13:18:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:18:36,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:36,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:36,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:18:36,666 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:36,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1038698482, now seen corresponding path program 1 times [2020-10-29 13:18:36,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:36,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050168785] [2020-10-29 13:18:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:36,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:36,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:36,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:36,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:41,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:41,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:18:41,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:18:41,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 13:18:41,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:41,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:18:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:18:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:18:41,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:42,254 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:18:42,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:42,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:42,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:42,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:42,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:42,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:18:42,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:42,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:42,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:42,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:42,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:42,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:42,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050168785] [2020-10-29 13:18:42,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:42,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:18:42,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132569130] [2020-10-29 13:18:42,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:18:42,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:42,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:18:42,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:18:42,299 INFO L87 Difference]: Start difference. First operand 559 states and 769 transitions. Second operand 6 states. [2020-10-29 13:18:42,865 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-29 13:18:45,061 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-10-29 13:18:45,600 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-29 13:18:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:45,803 INFO L93 Difference]: Finished difference Result 2497 states and 3627 transitions. [2020-10-29 13:18:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:18:45,803 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-29 13:18:45,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:45,811 INFO L225 Difference]: With dead ends: 2497 [2020-10-29 13:18:45,811 INFO L226 Difference]: Without dead ends: 2086 [2020-10-29 13:18:45,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:18:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2020-10-29 13:18:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1374. [2020-10-29 13:18:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1374 states. [2020-10-29 13:18:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 1955 transitions. [2020-10-29 13:18:46,101 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 1955 transitions. Word has length 99 [2020-10-29 13:18:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:46,101 INFO L481 AbstractCegarLoop]: Abstraction has 1374 states and 1955 transitions. [2020-10-29 13:18:46,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:18:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 1955 transitions. [2020-10-29 13:18:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:18:46,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:46,105 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:46,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:18:46,105 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:46,106 INFO L82 PathProgramCache]: Analyzing trace with hash 858080008, now seen corresponding path program 1 times [2020-10-29 13:18:46,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:46,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182354681] [2020-10-29 13:18:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:46,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:47,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:47,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:48,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:48,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:48,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:49,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:50,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:50,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:51,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:51,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:18:51,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:18:51,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:18:51,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:51,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:18:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:18:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:18:51,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:51,729 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:18:51,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:51,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:51,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:51,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:51,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:51,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:18:51,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:51,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:51,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:51,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:51,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:51,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:51,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182354681] [2020-10-29 13:18:51,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:51,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:18:51,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121198788] [2020-10-29 13:18:51,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:18:51,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:51,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:18:51,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:18:51,770 INFO L87 Difference]: Start difference. First operand 1374 states and 1955 transitions. Second operand 8 states. [2020-10-29 13:18:52,344 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-29 13:18:54,249 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2020-10-29 13:18:54,782 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-10-29 13:18:55,312 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:18:55,841 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-29 13:18:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:57,304 INFO L93 Difference]: Finished difference Result 9268 states and 13541 transitions. [2020-10-29 13:18:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:18:57,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-29 13:18:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:57,331 INFO L225 Difference]: With dead ends: 9268 [2020-10-29 13:18:57,331 INFO L226 Difference]: Without dead ends: 8073 [2020-10-29 13:18:57,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2020-10-29 13:18:57,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8073 states. [2020-10-29 13:18:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8073 to 2806. [2020-10-29 13:18:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2806 states. [2020-10-29 13:18:58,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 4099 transitions. [2020-10-29 13:18:58,010 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 4099 transitions. Word has length 99 [2020-10-29 13:18:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:58,011 INFO L481 AbstractCegarLoop]: Abstraction has 2806 states and 4099 transitions. [2020-10-29 13:18:58,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:18:58,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 4099 transitions. [2020-10-29 13:18:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:18:58,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:58,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:58,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:18:58,016 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:58,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:58,016 INFO L82 PathProgramCache]: Analyzing trace with hash 908663717, now seen corresponding path program 1 times [2020-10-29 13:18:58,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:58,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837784274] [2020-10-29 13:18:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:58,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:00,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:00,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:03,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:19:03,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:19:03,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:19:03,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:03,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:03,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:19:03,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:19:03,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-29 13:19:03,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:03,682 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:19:03,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:03,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:03,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:03,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:03,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:19:03,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:03,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:03,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:03,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:03,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:03,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:03,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837784274] [2020-10-29 13:19:03,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:03,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:19:03,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675330354] [2020-10-29 13:19:03,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:19:03,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:03,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:19:03,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:19:03,751 INFO L87 Difference]: Start difference. First operand 2806 states and 4099 transitions. Second operand 7 states. [2020-10-29 13:19:04,413 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-29 13:19:06,166 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-10-29 13:19:06,700 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:19:07,344 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-10-29 13:19:07,903 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-29 13:19:09,318 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-29 13:19:09,961 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:19:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:10,318 INFO L93 Difference]: Finished difference Result 11598 states and 17171 transitions. [2020-10-29 13:19:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:19:10,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-10-29 13:19:10,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:10,351 INFO L225 Difference]: With dead ends: 11598 [2020-10-29 13:19:10,352 INFO L226 Difference]: Without dead ends: 8971 [2020-10-29 13:19:10,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:19:10,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2020-10-29 13:19:10,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 2806. [2020-10-29 13:19:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2806 states. [2020-10-29 13:19:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 4075 transitions. [2020-10-29 13:19:10,958 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 4075 transitions. Word has length 99 [2020-10-29 13:19:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:10,958 INFO L481 AbstractCegarLoop]: Abstraction has 2806 states and 4075 transitions. [2020-10-29 13:19:10,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:19:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 4075 transitions. [2020-10-29 13:19:10,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:19:10,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:10,963 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:10,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:19:10,963 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:10,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:10,964 INFO L82 PathProgramCache]: Analyzing trace with hash -548449754, now seen corresponding path program 1 times [2020-10-29 13:19:10,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:10,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199560242] [2020-10-29 13:19:10,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:11,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:15,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:16,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:16,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:19:16,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:19:16,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:19:16,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:16,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:19:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 13:19:16,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:16,692 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:19:16,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:16,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:16,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:16,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:16,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:16,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:19:16,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:16,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:16,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:16,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:16,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:16,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:16,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199560242] [2020-10-29 13:19:16,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:16,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:19:16,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611506508] [2020-10-29 13:19:16,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:16,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:16,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:16,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:16,757 INFO L87 Difference]: Start difference. First operand 2806 states and 4075 transitions. Second operand 6 states. [2020-10-29 13:19:17,318 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-29 13:19:19,121 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-29 13:19:19,688 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-10-29 13:19:20,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:20,753 INFO L93 Difference]: Finished difference Result 9029 states and 13205 transitions. [2020-10-29 13:19:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:19:20,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-29 13:19:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:20,770 INFO L225 Difference]: With dead ends: 9029 [2020-10-29 13:19:20,770 INFO L226 Difference]: Without dead ends: 6402 [2020-10-29 13:19:20,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:19:20,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6402 states. [2020-10-29 13:19:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6402 to 6396. [2020-10-29 13:19:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6396 states. [2020-10-29 13:19:22,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6396 states to 6396 states and 9211 transitions. [2020-10-29 13:19:22,238 INFO L78 Accepts]: Start accepts. Automaton has 6396 states and 9211 transitions. Word has length 99 [2020-10-29 13:19:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:22,238 INFO L481 AbstractCegarLoop]: Abstraction has 6396 states and 9211 transitions. [2020-10-29 13:19:22,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:19:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 6396 states and 9211 transitions. [2020-10-29 13:19:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:19:22,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:22,242 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:22,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 13:19:22,243 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:22,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:22,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1385525884, now seen corresponding path program 1 times [2020-10-29 13:19:22,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:22,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448730208] [2020-10-29 13:19:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:22,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:22,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:22,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:22,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:22,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:22,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:22,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:22,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:22,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:23,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:23,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:23,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:27,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:27,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:19:27,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:19:27,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 13:19:27,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:27,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:27,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:19:27,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-29 13:19:27,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:19:27,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:27,857 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-10-29 13:19:27,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:27,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:27,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:27,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:27,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:27,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:19:27,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:27,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:27,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:27,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:27,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:27,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:27,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448730208] [2020-10-29 13:19:27,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:27,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:19:27,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206827592] [2020-10-29 13:19:27,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:19:27,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:27,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:19:27,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:19:27,897 INFO L87 Difference]: Start difference. First operand 6396 states and 9211 transitions. Second operand 8 states. [2020-10-29 13:19:28,476 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-10-29 13:19:31,017 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-10-29 13:19:31,642 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2020-10-29 13:19:32,203 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-10-29 13:19:32,768 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-10-29 13:19:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:43,150 INFO L93 Difference]: Finished difference Result 55032 states and 79589 transitions. [2020-10-29 13:19:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:19:43,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-29 13:19:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:43,387 INFO L225 Difference]: With dead ends: 55032 [2020-10-29 13:19:43,387 INFO L226 Difference]: Without dead ends: 48977 [2020-10-29 13:19:43,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2020-10-29 13:19:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48977 states.