/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:18:23,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:18:23,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:18:23,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:18:23,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:18:23,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:18:23,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:18:23,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:18:23,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:18:23,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:18:23,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:18:23,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:18:23,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:18:23,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:18:23,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:18:23,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:18:23,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:18:23,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:18:23,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:18:23,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:18:23,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:18:23,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:18:23,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:18:23,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:18:23,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:18:23,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:18:23,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:18:23,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:18:23,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:18:23,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:18:23,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:18:23,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:18:23,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:18:23,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:18:23,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:18:23,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:18:23,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:18:23,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:18:23,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:18:23,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:18:23,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:18:23,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:18:23,813 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:18:23,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:18:23,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:18:23,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:18:23,816 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:18:23,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:18:23,816 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:18:23,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:18:23,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:18:23,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:18:23,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:18:23,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:18:23,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:18:23,818 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:18:23,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:18:23,819 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:18:23,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:18:23,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:18:23,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:18:23,820 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:18:23,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:18:23,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:18:23,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:18:23,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:18:23,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:18:23,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:18:23,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:18:23,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:18:23,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:18:23,822 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:18:24,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:18:24,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:18:24,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:18:24,316 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:18:24,317 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:18:24,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 00:18:24,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/442d3834f/7075972266d24109b9b529fbad8ba5b8/FLAGf74e1be1b [2020-10-28 00:18:25,080 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:18:25,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 00:18:25,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/442d3834f/7075972266d24109b9b529fbad8ba5b8/FLAGf74e1be1b [2020-10-28 00:18:25,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/442d3834f/7075972266d24109b9b529fbad8ba5b8 [2020-10-28 00:18:25,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:18:25,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:18:25,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:18:25,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:18:25,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:18:25,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:18:25" (1/1) ... [2020-10-28 00:18:25,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56597449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:25, skipping insertion in model container [2020-10-28 00:18:25,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:18:25" (1/1) ... [2020-10-28 00:18:25,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:18:25,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:18:25,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:18:25,820 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:18:25,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:18:26,022 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:18:26,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:26 WrapperNode [2020-10-28 00:18:26,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:18:26,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:18:26,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:18:26,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:18:26,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:26" (1/1) ... [2020-10-28 00:18:26,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:26" (1/1) ... [2020-10-28 00:18:26,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:26" (1/1) ... [2020-10-28 00:18:26,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:26" (1/1) ... [2020-10-28 00:18:26,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:26" (1/1) ... [2020-10-28 00:18:26,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:26" (1/1) ... [2020-10-28 00:18:26,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:26" (1/1) ... [2020-10-28 00:18:26,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:18:26,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:18:26,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:18:26,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:18:26,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:18:26,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:18:26,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:18:26,205 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:18:26,206 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:18:26,206 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:18:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:18:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:18:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:18:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:18:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:18:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:18:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:18:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:18:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:18:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:18:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:18:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:18:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:18:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:18:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:18:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:18:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:18:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:18:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:18:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:18:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:18:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:18:26,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:18:26,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:18:27,796 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:18:27,797 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:18:27,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:18:27 BoogieIcfgContainer [2020-10-28 00:18:27,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:18:27,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:18:27,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:18:27,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:18:27,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:18:25" (1/3) ... [2020-10-28 00:18:27,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683e694b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:18:27, skipping insertion in model container [2020-10-28 00:18:27,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:26" (2/3) ... [2020-10-28 00:18:27,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683e694b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:18:27, skipping insertion in model container [2020-10-28 00:18:27,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:18:27" (3/3) ... [2020-10-28 00:18:27,810 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 00:18:27,825 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:18:27,830 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:18:27,846 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:18:27,877 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:18:27,878 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:18:27,878 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:18:27,878 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:18:27,878 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:18:27,878 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:18:27,879 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:18:27,879 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:18:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2020-10-28 00:18:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:18:27,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:27,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:18:27,917 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:27,927 INFO L82 PathProgramCache]: Analyzing trace with hash 2024411493, now seen corresponding path program 1 times [2020-10-28 00:18:27,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:27,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846709399] [2020-10-28 00:18:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:28,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:28,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:29,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:32,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:32,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:18:32,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:18:32,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4567 [2020-10-28 00:18:32,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:32,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:32,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-28 00:18:32,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:18:32,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:18:33,530 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:18:33,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:33,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:33,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:33,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:33,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:33,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:18:33,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:33,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:33,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:33,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:33,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:33,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846709399] [2020-10-28 00:18:33,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:33,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:18:33,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50542868] [2020-10-28 00:18:33,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:18:33,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:33,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:18:33,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:18:33,623 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 4 states. [2020-10-28 00:18:34,128 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 00:18:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:35,353 INFO L93 Difference]: Finished difference Result 431 states and 704 transitions. [2020-10-28 00:18:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:18:35,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-28 00:18:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:35,389 INFO L225 Difference]: With dead ends: 431 [2020-10-28 00:18:35,390 INFO L226 Difference]: Without dead ends: 321 [2020-10-28 00:18:35,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:35,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-28 00:18:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2020-10-28 00:18:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-28 00:18:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 472 transitions. [2020-10-28 00:18:35,535 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 472 transitions. Word has length 85 [2020-10-28 00:18:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:35,537 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 472 transitions. [2020-10-28 00:18:35,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:18:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 472 transitions. [2020-10-28 00:18:35,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 00:18:35,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:35,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:18:35,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:18:35,552 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:35,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1125009675, now seen corresponding path program 1 times [2020-10-28 00:18:35,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:35,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115532918] [2020-10-28 00:18:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:35,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:35,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:36,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:36,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 00:18:36,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:18:36,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1220 [2020-10-28 00:18:36,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:36,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:18:36,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-28 00:18:36,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:18:36,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:18:37,237 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:18:37,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:37,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:37,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:37,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:37,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:37,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 00:18:37,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:37,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:37,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:37,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:37,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:37,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115532918] [2020-10-28 00:18:37,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:37,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:18:37,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155006040] [2020-10-28 00:18:37,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:18:37,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:37,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:18:37,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:37,327 INFO L87 Difference]: Start difference. First operand 318 states and 472 transitions. Second operand 5 states. [2020-10-28 00:18:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:38,372 INFO L93 Difference]: Finished difference Result 492 states and 745 transitions. [2020-10-28 00:18:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:18:38,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-10-28 00:18:38,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:38,383 INFO L225 Difference]: With dead ends: 492 [2020-10-28 00:18:38,383 INFO L226 Difference]: Without dead ends: 489 [2020-10-28 00:18:38,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:18:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-10-28 00:18:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 320. [2020-10-28 00:18:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-28 00:18:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 474 transitions. [2020-10-28 00:18:38,430 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 474 transitions. Word has length 86 [2020-10-28 00:18:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:38,433 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 474 transitions. [2020-10-28 00:18:38,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:18:38,433 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 474 transitions. [2020-10-28 00:18:38,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 00:18:38,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:38,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:18:38,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:18:38,437 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:38,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1094504111, now seen corresponding path program 1 times [2020-10-28 00:18:38,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:38,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078774074] [2020-10-28 00:18:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:38,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:38,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:39,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:39,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 00:18:39,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:18:39,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-10-28 00:18:39,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:39,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 00:18:39,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:18:39,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:18:39,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:39,987 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:18:39,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:40,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:40,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:40,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:40,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:40,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:18:40,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:40,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:40,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:40,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:40,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:40,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078774074] [2020-10-28 00:18:40,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:40,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 00:18:40,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180187433] [2020-10-28 00:18:40,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 00:18:40,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:40,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 00:18:40,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:18:40,088 INFO L87 Difference]: Start difference. First operand 320 states and 474 transitions. Second operand 8 states. [2020-10-28 00:18:41,310 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 00:18:41,630 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 00:18:41,985 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-28 00:18:42,334 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-28 00:18:42,683 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:18:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:43,492 INFO L93 Difference]: Finished difference Result 1381 states and 2117 transitions. [2020-10-28 00:18:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:18:43,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2020-10-28 00:18:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:43,500 INFO L225 Difference]: With dead ends: 1381 [2020-10-28 00:18:43,501 INFO L226 Difference]: Without dead ends: 1142 [2020-10-28 00:18:43,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:18:43,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2020-10-28 00:18:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1130. [2020-10-28 00:18:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1130 states. [2020-10-28 00:18:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1727 transitions. [2020-10-28 00:18:43,590 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1727 transitions. Word has length 87 [2020-10-28 00:18:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:43,591 INFO L481 AbstractCegarLoop]: Abstraction has 1130 states and 1727 transitions. [2020-10-28 00:18:43,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 00:18:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1727 transitions. [2020-10-28 00:18:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 00:18:43,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:43,593 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:18:43,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:18:43,593 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:43,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:43,594 INFO L82 PathProgramCache]: Analyzing trace with hash -488241364, now seen corresponding path program 1 times [2020-10-28 00:18:43,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:43,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786225575] [2020-10-28 00:18:43,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:43,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:43,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:44,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:44,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 00:18:44,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:18:44,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-10-28 00:18:44,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:44,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:18:44,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:18:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 00:18:44,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:44,605 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:18:44,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:44,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:44,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:44,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:44,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:44,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:18:44,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:44,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:44,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:44,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:44,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:44,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786225575] [2020-10-28 00:18:44,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:44,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:18:44,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087591647] [2020-10-28 00:18:44,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:18:44,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:44,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:18:44,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:44,672 INFO L87 Difference]: Start difference. First operand 1130 states and 1727 transitions. Second operand 5 states. [2020-10-28 00:18:44,968 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-28 00:18:45,860 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 00:18:46,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:46,474 INFO L93 Difference]: Finished difference Result 2591 states and 4010 transitions. [2020-10-28 00:18:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:18:46,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-10-28 00:18:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:46,492 INFO L225 Difference]: With dead ends: 2591 [2020-10-28 00:18:46,492 INFO L226 Difference]: Without dead ends: 1828 [2020-10-28 00:18:46,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:18:46,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2020-10-28 00:18:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1825. [2020-10-28 00:18:46,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1825 states. [2020-10-28 00:18:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2804 transitions. [2020-10-28 00:18:46,638 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2804 transitions. Word has length 88 [2020-10-28 00:18:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:46,640 INFO L481 AbstractCegarLoop]: Abstraction has 1825 states and 2804 transitions. [2020-10-28 00:18:46,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:18:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2804 transitions. [2020-10-28 00:18:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 00:18:46,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:46,648 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] [2020-10-28 00:18:46,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:18:46,648 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:46,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:46,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1668291873, now seen corresponding path program 1 times [2020-10-28 00:18:46,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:46,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769854894] [2020-10-28 00:18:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:46,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:46,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:46,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:47,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:47,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:50,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:51,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:51,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 00:18:51,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:18:51,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:18:51,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:51,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:51,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 00:18:51,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:18:51,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:52,017 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:18:52,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:52,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:52,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:52,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:52,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:52,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 00:18:52,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:52,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:52,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:52,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:52,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:52,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769854894] [2020-10-28 00:18:52,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:52,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:18:52,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496103383] [2020-10-28 00:18:52,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:18:52,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:52,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:18:52,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:18:52,098 INFO L87 Difference]: Start difference. First operand 1825 states and 2804 transitions. Second operand 4 states. [2020-10-28 00:18:52,409 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 00:18:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:53,466 INFO L93 Difference]: Finished difference Result 4493 states and 6964 transitions. [2020-10-28 00:18:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:18:53,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-28 00:18:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:53,484 INFO L225 Difference]: With dead ends: 4493 [2020-10-28 00:18:53,484 INFO L226 Difference]: Without dead ends: 3146 [2020-10-28 00:18:53,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:53,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2020-10-28 00:18:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 3143. [2020-10-28 00:18:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3143 states. [2020-10-28 00:18:53,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3143 states to 3143 states and 4820 transitions. [2020-10-28 00:18:53,726 INFO L78 Accepts]: Start accepts. Automaton has 3143 states and 4820 transitions. Word has length 89 [2020-10-28 00:18:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:53,727 INFO L481 AbstractCegarLoop]: Abstraction has 3143 states and 4820 transitions. [2020-10-28 00:18:53,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:18:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3143 states and 4820 transitions. [2020-10-28 00:18:53,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 00:18:53,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:53,730 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] [2020-10-28 00:18:53,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:18:53,730 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:53,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:53,731 INFO L82 PathProgramCache]: Analyzing trace with hash 700344095, now seen corresponding path program 1 times [2020-10-28 00:18:53,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:53,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799121392] [2020-10-28 00:18:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:53,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:53,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:53,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:54,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:54,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:56,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:58,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:58,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 00:18:58,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:18:58,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:18:58,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:58,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:58,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 00:18:58,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:18:58,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:59,183 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:18:59,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:59,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:59,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:59,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:59,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:59,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:18:59,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:59,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:59,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:59,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:59,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:18:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:59,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799121392] [2020-10-28 00:18:59,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:59,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:18:59,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185283098] [2020-10-28 00:18:59,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:18:59,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:59,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:18:59,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:18:59,237 INFO L87 Difference]: Start difference. First operand 3143 states and 4820 transitions. Second operand 4 states. [2020-10-28 00:18:59,549 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 00:19:00,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:00,588 INFO L93 Difference]: Finished difference Result 6842 states and 10549 transitions. [2020-10-28 00:19:00,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:19:00,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-28 00:19:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:00,616 INFO L225 Difference]: With dead ends: 6842 [2020-10-28 00:19:00,616 INFO L226 Difference]: Without dead ends: 4933 [2020-10-28 00:19:00,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:19:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2020-10-28 00:19:00,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4911. [2020-10-28 00:19:00,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4911 states. [2020-10-28 00:19:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4911 states to 4911 states and 7463 transitions. [2020-10-28 00:19:00,929 INFO L78 Accepts]: Start accepts. Automaton has 4911 states and 7463 transitions. Word has length 89 [2020-10-28 00:19:00,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:00,929 INFO L481 AbstractCegarLoop]: Abstraction has 4911 states and 7463 transitions. [2020-10-28 00:19:00,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:19:00,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4911 states and 7463 transitions. [2020-10-28 00:19:00,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 00:19:00,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:00,933 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] [2020-10-28 00:19:00,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:19:00,933 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:00,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:00,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1237683681, now seen corresponding path program 1 times [2020-10-28 00:19:00,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:00,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127116908] [2020-10-28 00:19:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:01,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:01,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:01,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:01,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:02,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:04,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:04,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 00:19:04,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:19:04,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3790 [2020-10-28 00:19:04,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:04,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:19:04,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:19:04,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 00:19:04,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:05,055 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:19:05,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:05,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:05,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:05,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:05,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:05,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:19:05,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:05,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:05,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:05,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:05,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:05,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127116908] [2020-10-28 00:19:05,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:05,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:19:05,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548633903] [2020-10-28 00:19:05,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:19:05,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:05,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:19:05,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:19:05,093 INFO L87 Difference]: Start difference. First operand 4911 states and 7463 transitions. Second operand 6 states. [2020-10-28 00:19:06,180 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 00:19:07,418 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 00:19:07,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:07,975 INFO L93 Difference]: Finished difference Result 26566 states and 40365 transitions. [2020-10-28 00:19:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:19:07,976 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2020-10-28 00:19:07,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:08,074 INFO L225 Difference]: With dead ends: 26566 [2020-10-28 00:19:08,074 INFO L226 Difference]: Without dead ends: 22384 [2020-10-28 00:19:08,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:19:08,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22384 states. [2020-10-28 00:19:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22384 to 5231. [2020-10-28 00:19:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5231 states. [2020-10-28 00:19:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 7838 transitions. [2020-10-28 00:19:08,686 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 7838 transitions. Word has length 89 [2020-10-28 00:19:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:08,686 INFO L481 AbstractCegarLoop]: Abstraction has 5231 states and 7838 transitions. [2020-10-28 00:19:08,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:19:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 7838 transitions. [2020-10-28 00:19:08,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 00:19:08,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:08,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:08,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:19:08,692 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:08,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1996584350, now seen corresponding path program 1 times [2020-10-28 00:19:08,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:08,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949678806] [2020-10-28 00:19:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:08,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:08,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:08,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:09,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:09,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:09,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:10,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:11,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:13,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:13,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 00:19:13,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:19:13,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:19:13,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:13,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:19:13,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 00:19:13,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:19:13,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:14,032 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:19:14,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:14,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:14,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:14,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:14,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:14,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:19:14,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:14,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:14,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:14,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:14,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:14,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949678806] [2020-10-28 00:19:14,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:14,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:19:14,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675498190] [2020-10-28 00:19:14,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:19:14,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:14,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:19:14,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:19:14,075 INFO L87 Difference]: Start difference. First operand 5231 states and 7838 transitions. Second operand 4 states. [2020-10-28 00:19:14,376 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 00:19:15,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:15,540 INFO L93 Difference]: Finished difference Result 7557 states and 11346 transitions. [2020-10-28 00:19:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:19:15,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-28 00:19:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:15,557 INFO L225 Difference]: With dead ends: 7557 [2020-10-28 00:19:15,557 INFO L226 Difference]: Without dead ends: 6310 [2020-10-28 00:19:15,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:19:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6310 states. [2020-10-28 00:19:16,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6310 to 6307. [2020-10-28 00:19:16,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6307 states. [2020-10-28 00:19:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6307 states to 6307 states and 9354 transitions. [2020-10-28 00:19:16,040 INFO L78 Accepts]: Start accepts. Automaton has 6307 states and 9354 transitions. Word has length 89 [2020-10-28 00:19:16,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:16,041 INFO L481 AbstractCegarLoop]: Abstraction has 6307 states and 9354 transitions. [2020-10-28 00:19:16,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:19:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 6307 states and 9354 transitions. [2020-10-28 00:19:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 00:19:16,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:16,046 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] [2020-10-28 00:19:16,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:19:16,046 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:16,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:16,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1286829535, now seen corresponding path program 1 times [2020-10-28 00:19:16,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:16,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806826685] [2020-10-28 00:19:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:16,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:16,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:16,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:16,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:16,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:18,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:21,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:21,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 00:19:21,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:19:21,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:19:21,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:19:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 00:19:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:19:21,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:21,397 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:19:21,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:21,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:21,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:21,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:21,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:21,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:19:21,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:21,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:21,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:21,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:21,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:21,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806826685] [2020-10-28 00:19:21,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:21,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:19:21,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248744293] [2020-10-28 00:19:21,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:19:21,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:21,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:19:21,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:19:21,443 INFO L87 Difference]: Start difference. First operand 6307 states and 9354 transitions. Second operand 4 states. [2020-10-28 00:19:21,761 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 00:19:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:23,125 INFO L93 Difference]: Finished difference Result 15763 states and 23396 transitions. [2020-10-28 00:19:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:19:23,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-28 00:19:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:23,148 INFO L225 Difference]: With dead ends: 15763 [2020-10-28 00:19:23,148 INFO L226 Difference]: Without dead ends: 10404 [2020-10-28 00:19:23,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:19:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10404 states. [2020-10-28 00:19:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10404 to 10393. [2020-10-28 00:19:23,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10393 states. [2020-10-28 00:19:23,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10393 states to 10393 states and 15175 transitions. [2020-10-28 00:19:23,882 INFO L78 Accepts]: Start accepts. Automaton has 10393 states and 15175 transitions. Word has length 89 [2020-10-28 00:19:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:23,883 INFO L481 AbstractCegarLoop]: Abstraction has 10393 states and 15175 transitions. [2020-10-28 00:19:23,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:19:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 10393 states and 15175 transitions. [2020-10-28 00:19:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 00:19:23,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:23,890 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] [2020-10-28 00:19:23,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:19:23,890 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:23,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:23,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1105825551, now seen corresponding path program 1 times [2020-10-28 00:19:23,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:23,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62928761] [2020-10-28 00:19:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:23,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:23,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:24,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:24,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:24,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:26,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:26,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 00:19:26,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:19:26,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2328 [2020-10-28 00:19:26,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:26,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:19:26,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:19:26,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:19:26,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:26,570 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:19:26,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:26,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:26,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:26,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:26,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:26,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:19:26,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:26,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:26,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:26,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:26,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:26,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62928761] [2020-10-28 00:19:26,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:26,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:19:26,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925764130] [2020-10-28 00:19:26,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:19:26,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:26,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:19:26,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:19:26,605 INFO L87 Difference]: Start difference. First operand 10393 states and 15175 transitions. Second operand 6 states. [2020-10-28 00:19:27,851 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 00:19:29,331 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 00:19:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:30,216 INFO L93 Difference]: Finished difference Result 44370 states and 64290 transitions. [2020-10-28 00:19:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:19:30,216 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2020-10-28 00:19:30,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:30,285 INFO L225 Difference]: With dead ends: 44370 [2020-10-28 00:19:30,286 INFO L226 Difference]: Without dead ends: 35677 [2020-10-28 00:19:30,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:19:30,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35677 states. [2020-10-28 00:19:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35677 to 19141. [2020-10-28 00:19:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19141 states. [2020-10-28 00:19:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19141 states to 19141 states and 27423 transitions. [2020-10-28 00:19:31,887 INFO L78 Accepts]: Start accepts. Automaton has 19141 states and 27423 transitions. Word has length 89 [2020-10-28 00:19:31,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:31,887 INFO L481 AbstractCegarLoop]: Abstraction has 19141 states and 27423 transitions. [2020-10-28 00:19:31,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:19:31,887 INFO L276 IsEmpty]: Start isEmpty. Operand 19141 states and 27423 transitions. [2020-10-28 00:19:31,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 00:19:31,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:31,898 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] [2020-10-28 00:19:31,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:19:31,898 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:31,899 INFO L82 PathProgramCache]: Analyzing trace with hash 194016400, now seen corresponding path program 1 times [2020-10-28 00:19:31,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:31,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109593760] [2020-10-28 00:19:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:31,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:31,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:32,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:32,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:32,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:33,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:33,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 00:19:33,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:19:33,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1745 [2020-10-28 00:19:33,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:19:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:19:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:19:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:33,989 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:19:33,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:33,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:34,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:34,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:34,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:34,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:19:34,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:34,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:34,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:34,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:34,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:34,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109593760] [2020-10-28 00:19:34,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:34,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:19:34,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140561701] [2020-10-28 00:19:34,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:19:34,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:34,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:19:34,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:19:34,025 INFO L87 Difference]: Start difference. First operand 19141 states and 27423 transitions. Second operand 6 states. [2020-10-28 00:19:35,242 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 00:19:37,780 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 00:19:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:41,931 INFO L93 Difference]: Finished difference Result 121949 states and 173561 transitions. [2020-10-28 00:19:41,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:19:41,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2020-10-28 00:19:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:42,293 INFO L225 Difference]: With dead ends: 121949 [2020-10-28 00:19:42,294 INFO L226 Difference]: Without dead ends: 105164 [2020-10-28 00:19:42,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:19:42,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105164 states. [2020-10-28 00:19:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105164 to 19932. [2020-10-28 00:19:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19932 states. [2020-10-28 00:19:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19932 states to 19932 states and 28184 transitions. [2020-10-28 00:19:44,634 INFO L78 Accepts]: Start accepts. Automaton has 19932 states and 28184 transitions. Word has length 89 [2020-10-28 00:19:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:44,635 INFO L481 AbstractCegarLoop]: Abstraction has 19932 states and 28184 transitions. [2020-10-28 00:19:44,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:19:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 19932 states and 28184 transitions. [2020-10-28 00:19:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 00:19:44,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:44,647 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] [2020-10-28 00:19:44,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:19:44,648 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:44,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:44,649 INFO L82 PathProgramCache]: Analyzing trace with hash 731355986, now seen corresponding path program 1 times [2020-10-28 00:19:44,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:44,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468298238] [2020-10-28 00:19:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:44,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:44,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:44,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:45,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:45,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:45,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:45,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:47,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:49,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:49,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 00:19:49,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:19:49,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:19:49,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:49,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:19:49,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 00:19:49,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:19:49,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:49,986 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:19:49,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:49,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:50,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:50,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:50,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:50,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:19:50,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:50,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:50,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:50,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:50,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:50,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468298238] [2020-10-28 00:19:50,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:50,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:19:50,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140494969] [2020-10-28 00:19:50,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:19:50,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:50,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:19:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:19:50,017 INFO L87 Difference]: Start difference. First operand 19932 states and 28184 transitions. Second operand 4 states. [2020-10-28 00:19:50,343 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 00:19:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:52,966 INFO L93 Difference]: Finished difference Result 36861 states and 52318 transitions. [2020-10-28 00:19:52,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:19:52,967 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-28 00:19:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:52,999 INFO L225 Difference]: With dead ends: 36861 [2020-10-28 00:19:52,999 INFO L226 Difference]: Without dead ends: 25530 [2020-10-28 00:19:53,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:19:53,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25530 states. [2020-10-28 00:19:54,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25530 to 25456. [2020-10-28 00:19:55,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25456 states. [2020-10-28 00:19:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25456 states to 25456 states and 35515 transitions. [2020-10-28 00:19:55,046 INFO L78 Accepts]: Start accepts. Automaton has 25456 states and 35515 transitions. Word has length 89 [2020-10-28 00:19:55,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:55,046 INFO L481 AbstractCegarLoop]: Abstraction has 25456 states and 35515 transitions. [2020-10-28 00:19:55,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:19:55,046 INFO L276 IsEmpty]: Start isEmpty. Operand 25456 states and 35515 transitions. [2020-10-28 00:19:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 00:19:55,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:55,060 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] [2020-10-28 00:19:55,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:19:55,060 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:55,060 INFO L82 PathProgramCache]: Analyzing trace with hash -576562941, now seen corresponding path program 1 times [2020-10-28 00:19:55,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:55,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918363464] [2020-10-28 00:19:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:55,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:55,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:55,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:55,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:55,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:57,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:57,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 00:19:57,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:19:57,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2221 [2020-10-28 00:19:57,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:57,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:19:57,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:19:57,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:19:57,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:57,626 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:19:57,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:57,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:57,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:57,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:57,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:57,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:19:57,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:57,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:57,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:57,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:57,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:57,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918363464] [2020-10-28 00:19:57,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:57,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:19:57,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265545523] [2020-10-28 00:19:57,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:19:57,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:57,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:19:57,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:19:57,661 INFO L87 Difference]: Start difference. First operand 25456 states and 35515 transitions. Second operand 6 states. [2020-10-28 00:19:59,138 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 00:20:01,543 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 00:20:06,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:06,729 INFO L93 Difference]: Finished difference Result 123991 states and 173236 transitions. [2020-10-28 00:20:06,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:20:06,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2020-10-28 00:20:06,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:06,885 INFO L225 Difference]: With dead ends: 123991 [2020-10-28 00:20:06,886 INFO L226 Difference]: Without dead ends: 101894 [2020-10-28 00:20:06,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:20:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101894 states. [2020-10-28 00:20:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101894 to 25594. [2020-10-28 00:20:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25594 states. [2020-10-28 00:20:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25594 states to 25594 states and 35493 transitions. [2020-10-28 00:20:09,720 INFO L78 Accepts]: Start accepts. Automaton has 25594 states and 35493 transitions. Word has length 89 [2020-10-28 00:20:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:09,720 INFO L481 AbstractCegarLoop]: Abstraction has 25594 states and 35493 transitions. [2020-10-28 00:20:09,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:20:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 25594 states and 35493 transitions. [2020-10-28 00:20:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 00:20:09,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:09,732 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] [2020-10-28 00:20:09,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:20:09,732 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:09,733 INFO L82 PathProgramCache]: Analyzing trace with hash 357803616, now seen corresponding path program 1 times [2020-10-28 00:20:09,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:09,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704247200] [2020-10-28 00:20:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:09,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:09,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:09,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:09,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:10,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:13,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:13,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 00:20:13,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:20:13,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3330 [2020-10-28 00:20:13,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:13,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:20:13,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:20:13,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 00:20:13,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:13,400 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:20:13,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:13,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:13,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:13,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:13,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:13,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:20:13,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:13,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:13,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:13,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:13,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:13,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704247200] [2020-10-28 00:20:13,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:20:13,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:20:13,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318093465] [2020-10-28 00:20:13,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:20:13,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:13,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:20:13,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:20:13,426 INFO L87 Difference]: Start difference. First operand 25594 states and 35493 transitions. Second operand 6 states. [2020-10-28 00:20:14,937 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 00:20:15,399 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 00:20:22,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:22,414 INFO L93 Difference]: Finished difference Result 111905 states and 154961 transitions. [2020-10-28 00:20:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:20:22,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2020-10-28 00:20:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:22,519 INFO L225 Difference]: With dead ends: 111905 [2020-10-28 00:20:22,519 INFO L226 Difference]: Without dead ends: 89085 [2020-10-28 00:20:22,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:20:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89085 states. [2020-10-28 00:20:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89085 to 25916. [2020-10-28 00:20:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25916 states. [2020-10-28 00:20:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25916 states to 25916 states and 35527 transitions. [2020-10-28 00:20:25,709 INFO L78 Accepts]: Start accepts. Automaton has 25916 states and 35527 transitions. Word has length 90 [2020-10-28 00:20:25,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:25,709 INFO L481 AbstractCegarLoop]: Abstraction has 25916 states and 35527 transitions. [2020-10-28 00:20:25,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:20:25,709 INFO L276 IsEmpty]: Start isEmpty. Operand 25916 states and 35527 transitions. [2020-10-28 00:20:25,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 00:20:25,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:25,721 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] [2020-10-28 00:20:25,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:20:25,721 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:25,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:25,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1692089356, now seen corresponding path program 1 times [2020-10-28 00:20:25,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:25,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389927806] [2020-10-28 00:20:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:25,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:25,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:25,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:26,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:26,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:26,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:26,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:26,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:26,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:27,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:27,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:30,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:30,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:30,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 00:20:30,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:20:30,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 00:20:30,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:30,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:20:30,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:20:30,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 00:20:30,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:31,328 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:20:31,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:31,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:31,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:31,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:31,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:31,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:20:31,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:31,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:31,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:31,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:31,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:31,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389927806] [2020-10-28 00:20:31,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:20:31,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:20:31,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708596078] [2020-10-28 00:20:31,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:20:31,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:31,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:20:31,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:20:31,367 INFO L87 Difference]: Start difference. First operand 25916 states and 35527 transitions. Second operand 11 states. [2020-10-28 00:20:31,750 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-28 00:20:34,351 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 00:20:38,522 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 00:20:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:42,241 INFO L93 Difference]: Finished difference Result 96811 states and 132330 transitions. [2020-10-28 00:20:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 00:20:42,242 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 90 [2020-10-28 00:20:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:42,329 INFO L225 Difference]: With dead ends: 96811 [2020-10-28 00:20:42,329 INFO L226 Difference]: Without dead ends: 81808 [2020-10-28 00:20:42,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 00:20:42,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81808 states. [2020-10-28 00:20:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81808 to 26898. [2020-10-28 00:20:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26898 states. [2020-10-28 00:20:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26898 states to 26898 states and 36817 transitions. [2020-10-28 00:20:45,298 INFO L78 Accepts]: Start accepts. Automaton has 26898 states and 36817 transitions. Word has length 90 [2020-10-28 00:20:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:45,298 INFO L481 AbstractCegarLoop]: Abstraction has 26898 states and 36817 transitions. [2020-10-28 00:20:45,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:20:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 26898 states and 36817 transitions. [2020-10-28 00:20:45,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 00:20:45,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:45,309 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] [2020-10-28 00:20:45,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:20:45,309 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:45,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1224341931, now seen corresponding path program 1 times [2020-10-28 00:20:45,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:45,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944101625] [2020-10-28 00:20:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:45,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:45,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:45,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:45,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:45,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:46,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:46,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:46,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:46,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:47,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:47,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:50,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:50,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:50,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 00:20:50,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:20:50,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:20:50,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:20:50,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:20:50,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 00:20:50,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:50,868 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:20:50,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:50,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:50,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:50,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:50,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:50,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:20:50,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:50,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:50,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:50,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:50,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:50,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944101625] [2020-10-28 00:20:50,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:20:50,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:20:50,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973048806] [2020-10-28 00:20:50,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:20:50,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:50,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:20:50,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:20:50,907 INFO L87 Difference]: Start difference. First operand 26898 states and 36817 transitions. Second operand 11 states. [2020-10-28 00:20:51,282 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 00:20:54,616 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 00:21:02,338 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 00:21:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:21:16,750 INFO L93 Difference]: Finished difference Result 201839 states and 274828 transitions. [2020-10-28 00:21:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 00:21:16,751 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 90 [2020-10-28 00:21:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:21:17,039 INFO L225 Difference]: With dead ends: 201839 [2020-10-28 00:21:17,039 INFO L226 Difference]: Without dead ends: 183408 [2020-10-28 00:21:17,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 00:21:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183408 states. [2020-10-28 00:21:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183408 to 28855. [2020-10-28 00:21:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28855 states. [2020-10-28 00:21:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28855 states to 28855 states and 39452 transitions. [2020-10-28 00:21:21,303 INFO L78 Accepts]: Start accepts. Automaton has 28855 states and 39452 transitions. Word has length 90 [2020-10-28 00:21:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:21:21,303 INFO L481 AbstractCegarLoop]: Abstraction has 28855 states and 39452 transitions. [2020-10-28 00:21:21,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:21:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 28855 states and 39452 transitions. [2020-10-28 00:21:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 00:21:21,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:21:21,316 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] [2020-10-28 00:21:21,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:21:21,316 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:21:21,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:21:21,317 INFO L82 PathProgramCache]: Analyzing trace with hash -759608055, now seen corresponding path program 1 times [2020-10-28 00:21:21,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:21:21,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556433197] [2020-10-28 00:21:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:21:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:21:21,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:21,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:21,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:22,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:22,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:22,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:22,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:22,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:22,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:22,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:23,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:24,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:26,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:21:26,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 00:21:26,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:21:26,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:21:26,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:21:26,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:21:26,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:21:26,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:21:26,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:21:26,813 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:21:26,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:21:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:21:26,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:26,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:21:26,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:21:26,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:21:26,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:21:26,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:21:26,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:21:26,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:21:26,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:21:26,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:21:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:21:26,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556433197] [2020-10-28 00:21:26,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:21:26,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:21:26,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823358626] [2020-10-28 00:21:26,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:21:26,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:21:26,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:21:26,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:21:26,852 INFO L87 Difference]: Start difference. First operand 28855 states and 39452 transitions. Second operand 11 states. [2020-10-28 00:21:27,212 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 00:21:30,899 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 00:21:43,863 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 182