/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:57:16,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:57:16,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:57:16,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:57:16,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:57:16,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:57:16,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:57:16,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:57:16,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:57:16,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:57:16,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:57:16,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:57:16,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:57:16,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:57:16,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:57:16,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:57:16,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:57:16,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:57:16,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:57:16,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:57:16,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:57:16,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:57:16,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:57:16,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:57:16,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:57:16,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:57:16,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:57:16,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:57:16,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:57:16,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:57:16,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:57:16,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:57:16,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:57:16,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:57:16,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:57:16,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:57:16,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:57:16,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:57:16,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:57:16,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:57:16,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:57:16,832 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:57:16,863 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:57:16,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:57:16,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:57:16,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:57:16,868 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:57:16,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:57:16,868 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:57:16,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:57:16,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:57:16,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:57:16,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:57:16,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:57:16,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:57:16,871 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:57:16,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:57:16,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:57:16,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:57:16,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:57:16,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:57:16,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:57:16,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:57:16,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:57:16,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:57:16,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:57:16,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:57:16,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:57:16,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:57:16,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:57:16,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:57:16,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:57:17,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:57:17,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:57:17,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:57:17,348 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:57:17,349 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:57:17,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:57:17,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4198f55f/2081663210d74b7ca21a91d0b2dacd1f/FLAG76b8fcb92 [2020-10-29 13:57:18,117 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:57:18,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:57:18,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4198f55f/2081663210d74b7ca21a91d0b2dacd1f/FLAG76b8fcb92 [2020-10-29 13:57:18,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4198f55f/2081663210d74b7ca21a91d0b2dacd1f [2020-10-29 13:57:18,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:57:18,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:57:18,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:57:18,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:57:18,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:57:18,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:57:18" (1/1) ... [2020-10-29 13:57:18,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@142dfa98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:57:18, skipping insertion in model container [2020-10-29 13:57:18,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:57:18" (1/1) ... [2020-10-29 13:57:18,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:57:18,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:57:18,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:57:18,876 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:57:18,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:57:19,019 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:57:19,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:57:19 WrapperNode [2020-10-29 13:57:19,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:57:19,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:57:19,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:57:19,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:57:19,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:57:19" (1/1) ... [2020-10-29 13:57:19,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:57:19" (1/1) ... [2020-10-29 13:57:19,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:57:19" (1/1) ... [2020-10-29 13:57:19,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:57:19" (1/1) ... [2020-10-29 13:57:19,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:57:19" (1/1) ... [2020-10-29 13:57:19,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:57:19" (1/1) ... [2020-10-29 13:57:19,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:57:19" (1/1) ... [2020-10-29 13:57:19,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:57:19,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:57:19,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:57:19,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:57:19,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:57:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:57:19,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:57:19,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:57:19,216 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:57:19,216 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:57:19,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:57:19,216 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:57:19,217 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:57:19,217 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:57:19,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:57:19,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:57:19,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:57:19,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:57:19,217 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:57:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:57:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:57:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:57:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:57:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:57:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:57:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:57:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:57:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:57:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:57:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:57:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:57:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:57:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:57:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:57:20,249 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:57:20,250 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:57:20,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:57:20 BoogieIcfgContainer [2020-10-29 13:57:20,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:57:20,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:57:20,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:57:20,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:57:20,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:57:18" (1/3) ... [2020-10-29 13:57:20,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6039dbdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:57:20, skipping insertion in model container [2020-10-29 13:57:20,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:57:19" (2/3) ... [2020-10-29 13:57:20,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6039dbdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:57:20, skipping insertion in model container [2020-10-29 13:57:20,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:57:20" (3/3) ... [2020-10-29 13:57:20,261 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:57:20,272 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:57:20,278 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:57:20,291 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:57:20,318 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:57:20,318 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:57:20,318 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:57:20,319 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:57:20,319 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:57:20,319 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:57:20,319 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:57:20,319 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:57:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2020-10-29 13:57:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 13:57:20,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:20,352 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] [2020-10-29 13:57:20,353 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:20,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1140957863, now seen corresponding path program 1 times [2020-10-29 13:57:20,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:20,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256902617] [2020-10-29 13:57:20,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:20,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:20,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:21,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:21,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:24,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:24,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 13:57:24,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:57:24,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3559 [2020-10-29 13:57:24,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:24,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:24,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:57:24,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 13:57:24,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 13:57:24,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:57:24,690 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:57:24,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:24,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:24,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:24,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:24,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:24,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:57:24,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:24,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:24,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:24,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:24,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:24,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:57:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:24,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256902617] [2020-10-29 13:57:24,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:24,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:57:24,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415865417] [2020-10-29 13:57:24,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:57:24,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:24,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:57:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:57:24,782 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 4 states. [2020-10-29 13:57:25,165 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-29 13:57:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:26,180 INFO L93 Difference]: Finished difference Result 348 states and 574 transitions. [2020-10-29 13:57:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:57:26,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-29 13:57:26,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:26,196 INFO L225 Difference]: With dead ends: 348 [2020-10-29 13:57:26,196 INFO L226 Difference]: Without dead ends: 237 [2020-10-29 13:57:26,200 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 [2020-10-29 13:57:26,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-29 13:57:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2020-10-29 13:57:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-29 13:57:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 364 transitions. [2020-10-29 13:57:26,299 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 364 transitions. Word has length 61 [2020-10-29 13:57:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:26,300 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 364 transitions. [2020-10-29 13:57:26,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:57:26,300 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 364 transitions. [2020-10-29 13:57:26,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 13:57:26,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:26,304 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] [2020-10-29 13:57:26,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:57:26,304 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:26,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:26,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1703080058, now seen corresponding path program 1 times [2020-10-29 13:57:26,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:26,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330840441] [2020-10-29 13:57:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:26,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:26,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:26,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:26,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:28,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:31,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:31,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 13:57:31,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:57:31,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4964 [2020-10-29 13:57:31,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:31,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:31,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:57:31,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:57:31,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:57:31,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 13:57:31,724 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:57:31,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:31,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:31,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:31,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:31,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:31,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:57:31,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:31,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:31,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:31,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:31,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:31,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:31,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330840441] [2020-10-29 13:57:31,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:31,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:57:31,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298332080] [2020-10-29 13:57:31,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:57:31,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:31,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:57:31,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:57:31,822 INFO L87 Difference]: Start difference. First operand 233 states and 364 transitions. Second operand 5 states. [2020-10-29 13:57:32,985 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:57:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:33,139 INFO L93 Difference]: Finished difference Result 657 states and 1027 transitions. [2020-10-29 13:57:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:57:33,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-29 13:57:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:33,149 INFO L225 Difference]: With dead ends: 657 [2020-10-29 13:57:33,149 INFO L226 Difference]: Without dead ends: 445 [2020-10-29 13:57:33,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:57:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-29 13:57:33,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 442. [2020-10-29 13:57:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-29 13:57:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 689 transitions. [2020-10-29 13:57:33,214 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 689 transitions. Word has length 63 [2020-10-29 13:57:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:33,214 INFO L481 AbstractCegarLoop]: Abstraction has 442 states and 689 transitions. [2020-10-29 13:57:33,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:57:33,215 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 689 transitions. [2020-10-29 13:57:33,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 13:57:33,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:33,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:57:33,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:57:33,220 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:33,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1583511459, now seen corresponding path program 1 times [2020-10-29 13:57:33,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:33,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133326679] [2020-10-29 13:57:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:33,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:33,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:33,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:33,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:34,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:37,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:37,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 13:57:37,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:57:37,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4319 [2020-10-29 13:57:37,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:37,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:37,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:57:37,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 13:57:37,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:57:37,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:57:37,893 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:57:37,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:37,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:37,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:37,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:37,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:37,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:57:37,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:37,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:37,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:37,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:37,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:37,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:37,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133326679] [2020-10-29 13:57:37,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:37,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:57:37,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710797563] [2020-10-29 13:57:37,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:57:37,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:37,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:57:37,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:57:37,960 INFO L87 Difference]: Start difference. First operand 442 states and 689 transitions. Second operand 4 states. [2020-10-29 13:57:38,254 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-29 13:57:39,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:39,028 INFO L93 Difference]: Finished difference Result 1094 states and 1751 transitions. [2020-10-29 13:57:39,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:57:39,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-29 13:57:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:39,037 INFO L225 Difference]: With dead ends: 1094 [2020-10-29 13:57:39,038 INFO L226 Difference]: Without dead ends: 753 [2020-10-29 13:57:39,045 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 [2020-10-29 13:57:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2020-10-29 13:57:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 746. [2020-10-29 13:57:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2020-10-29 13:57:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1181 transitions. [2020-10-29 13:57:39,127 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1181 transitions. Word has length 64 [2020-10-29 13:57:39,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:39,129 INFO L481 AbstractCegarLoop]: Abstraction has 746 states and 1181 transitions. [2020-10-29 13:57:39,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:57:39,130 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1181 transitions. [2020-10-29 13:57:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:57:39,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:39,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:57:39,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:57:39,145 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:39,146 INFO L82 PathProgramCache]: Analyzing trace with hash -4723332, now seen corresponding path program 1 times [2020-10-29 13:57:39,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:39,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55271581] [2020-10-29 13:57:39,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:39,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:39,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:39,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:39,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:39,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:42,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:44,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:44,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:57:44,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:57:44,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-29 13:57:44,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:44,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:44,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:57:44,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:57:44,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:57:44,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:44,585 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:57:44,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:44,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:44,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:44,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:44,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:44,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:57:44,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:44,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:44,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:44,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55271581] [2020-10-29 13:57:44,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:44,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:57:44,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895720195] [2020-10-29 13:57:44,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:57:44,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:44,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:57:44,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:57:44,651 INFO L87 Difference]: Start difference. First operand 746 states and 1181 transitions. Second operand 5 states. [2020-10-29 13:57:45,818 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:57:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:46,054 INFO L93 Difference]: Finished difference Result 2066 states and 3294 transitions. [2020-10-29 13:57:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:57:46,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-29 13:57:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:46,067 INFO L225 Difference]: With dead ends: 2066 [2020-10-29 13:57:46,067 INFO L226 Difference]: Without dead ends: 1421 [2020-10-29 13:57:46,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:57:46,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2020-10-29 13:57:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1418. [2020-10-29 13:57:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1418 states. [2020-10-29 13:57:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 2232 transitions. [2020-10-29 13:57:46,219 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 2232 transitions. Word has length 66 [2020-10-29 13:57:46,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:46,219 INFO L481 AbstractCegarLoop]: Abstraction has 1418 states and 2232 transitions. [2020-10-29 13:57:46,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:57:46,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 2232 transitions. [2020-10-29 13:57:46,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:57:46,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:46,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:57:46,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:57:46,224 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:46,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:46,224 INFO L82 PathProgramCache]: Analyzing trace with hash 457744513, now seen corresponding path program 1 times [2020-10-29 13:57:46,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:46,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289947906] [2020-10-29 13:57:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:46,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:46,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:46,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:46,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:47,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:47,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:50,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:50,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:57:50,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:57:50,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4457 [2020-10-29 13:57:50,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:50,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:50,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:57:50,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:57:50,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:57:50,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:57:51,034 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:57:51,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:51,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:51,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:51,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:51,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:51,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:57:51,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:51,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:51,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:51,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:51,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:51,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:51,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289947906] [2020-10-29 13:57:51,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:51,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:57:51,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219597162] [2020-10-29 13:57:51,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:57:51,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:51,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:57:51,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:57:51,090 INFO L87 Difference]: Start difference. First operand 1418 states and 2232 transitions. Second operand 5 states. [2020-10-29 13:57:52,577 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:57:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:52,810 INFO L93 Difference]: Finished difference Result 4115 states and 6470 transitions. [2020-10-29 13:57:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:57:52,810 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-29 13:57:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:52,829 INFO L225 Difference]: With dead ends: 4115 [2020-10-29 13:57:52,829 INFO L226 Difference]: Without dead ends: 2726 [2020-10-29 13:57:52,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:57:52,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2020-10-29 13:57:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2723. [2020-10-29 13:57:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2723 states. [2020-10-29 13:57:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 4246 transitions. [2020-10-29 13:57:53,092 INFO L78 Accepts]: Start accepts. Automaton has 2723 states and 4246 transitions. Word has length 67 [2020-10-29 13:57:53,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:53,092 INFO L481 AbstractCegarLoop]: Abstraction has 2723 states and 4246 transitions. [2020-10-29 13:57:53,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:57:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2723 states and 4246 transitions. [2020-10-29 13:57:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:57:53,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:53,098 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] [2020-10-29 13:57:53,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:57:53,098 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1274042080, now seen corresponding path program 1 times [2020-10-29 13:57:53,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:53,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772552322] [2020-10-29 13:57:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:53,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:53,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:53,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:53,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:53,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:53,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:54,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:56,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:56,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:57:56,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:57:56,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3642 [2020-10-29 13:57:56,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:56,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:56,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:57:56,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:57:56,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:57:56,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:57,155 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:57:57,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:57,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:57,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:57,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:57,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:57,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:57:57,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:57,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:57,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:57,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:57,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:57,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:57:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:57,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772552322] [2020-10-29 13:57:57,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:57,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:57:57,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876609655] [2020-10-29 13:57:57,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:57:57,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:57,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:57:57,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:57:57,216 INFO L87 Difference]: Start difference. First operand 2723 states and 4246 transitions. Second operand 5 states. [2020-10-29 13:57:57,587 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-29 13:57:58,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:58,770 INFO L93 Difference]: Finished difference Result 4603 states and 7119 transitions. [2020-10-29 13:57:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:57:58,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-29 13:57:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:58,788 INFO L225 Difference]: With dead ends: 4603 [2020-10-29 13:57:58,788 INFO L226 Difference]: Without dead ends: 3162 [2020-10-29 13:57:58,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:57:58,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2020-10-29 13:57:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 3159. [2020-10-29 13:57:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3159 states. [2020-10-29 13:57:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 4852 transitions. [2020-10-29 13:57:59,149 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 4852 transitions. Word has length 68 [2020-10-29 13:57:59,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:59,149 INFO L481 AbstractCegarLoop]: Abstraction has 3159 states and 4852 transitions. [2020-10-29 13:57:59,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:57:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 4852 transitions. [2020-10-29 13:57:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:57:59,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:59,155 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] [2020-10-29 13:57:59,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:57:59,156 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:59,156 INFO L82 PathProgramCache]: Analyzing trace with hash 441163617, now seen corresponding path program 1 times [2020-10-29 13:57:59,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:59,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004743283] [2020-10-29 13:57:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:59,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:59,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:59,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:59,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:59,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:59,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:57:59,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:57:59,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 754 [2020-10-29 13:57:59,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:59,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:59,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:57:59,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:57:59,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:57:59,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:00,223 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:58:00,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:58:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:00,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:00,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:00,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:58:00,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:58:00,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:58:00,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:00,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:00,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:58:00,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:58:00,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:58:00,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:58:00,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004743283] [2020-10-29 13:58:00,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:58:00,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:58:00,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446764077] [2020-10-29 13:58:00,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:58:00,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:58:00,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:58:00,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:58:00,273 INFO L87 Difference]: Start difference. First operand 3159 states and 4852 transitions. Second operand 5 states. [2020-10-29 13:58:01,596 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:58:01,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:58:01,985 INFO L93 Difference]: Finished difference Result 9013 states and 13793 transitions. [2020-10-29 13:58:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:58:01,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-29 13:58:01,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:58:02,017 INFO L225 Difference]: With dead ends: 9013 [2020-10-29 13:58:02,018 INFO L226 Difference]: Without dead ends: 6002 [2020-10-29 13:58:02,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:58:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2020-10-29 13:58:02,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 5999. [2020-10-29 13:58:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5999 states. [2020-10-29 13:58:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5999 states to 5999 states and 9086 transitions. [2020-10-29 13:58:02,652 INFO L78 Accepts]: Start accepts. Automaton has 5999 states and 9086 transitions. Word has length 68 [2020-10-29 13:58:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:58:02,652 INFO L481 AbstractCegarLoop]: Abstraction has 5999 states and 9086 transitions. [2020-10-29 13:58:02,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:58:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 5999 states and 9086 transitions. [2020-10-29 13:58:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:58:02,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:58:02,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:58:02,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:58:02,662 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:58:02,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:58:02,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1209427875, now seen corresponding path program 1 times [2020-10-29 13:58:02,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:58:02,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21284605] [2020-10-29 13:58:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:58:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:02,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:02,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:02,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:02,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:58:02,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:58:02,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-29 13:58:02,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:02,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:02,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:58:02,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-29 13:58:02,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 13:58:02,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:03,223 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:58:03,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:58:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:03,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:03,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:03,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:58:03,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:58:03,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:58:03,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:03,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:03,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:58:03,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:58:03,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:58:03,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:58:03,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21284605] [2020-10-29 13:58:03,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:58:03,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:58:03,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217366610] [2020-10-29 13:58:03,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:58:03,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:58:03,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:58:03,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:58:03,267 INFO L87 Difference]: Start difference. First operand 5999 states and 9086 transitions. Second operand 4 states. [2020-10-29 13:58:03,523 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-29 13:58:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:58:05,013 INFO L93 Difference]: Finished difference Result 15685 states and 24386 transitions. [2020-10-29 13:58:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:58:05,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-29 13:58:05,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:58:05,072 INFO L225 Difference]: With dead ends: 15685 [2020-10-29 13:58:05,072 INFO L226 Difference]: Without dead ends: 10590 [2020-10-29 13:58:05,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:58:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10590 states. [2020-10-29 13:58:06,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10590 to 10515. [2020-10-29 13:58:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10515 states. [2020-10-29 13:58:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10515 states to 10515 states and 16122 transitions. [2020-10-29 13:58:06,196 INFO L78 Accepts]: Start accepts. Automaton has 10515 states and 16122 transitions. Word has length 69 [2020-10-29 13:58:06,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:58:06,196 INFO L481 AbstractCegarLoop]: Abstraction has 10515 states and 16122 transitions. [2020-10-29 13:58:06,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:58:06,196 INFO L276 IsEmpty]: Start isEmpty. Operand 10515 states and 16122 transitions. [2020-10-29 13:58:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:58:06,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:58:06,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:58:06,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:58:06,210 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:58:06,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:58:06,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1862851262, now seen corresponding path program 1 times [2020-10-29 13:58:06,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:58:06,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576844503] [2020-10-29 13:58:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:58:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:06,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:06,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:06,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:07,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:07,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:58:07,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:58:07,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1215 [2020-10-29 13:58:07,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:07,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:58:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:58:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:58:07,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:07,782 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:58:07,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:58:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:07,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:07,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:07,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:58:07,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:58:07,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:58:07,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:07,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:07,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:58:07,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:58:07,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:58:07,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:58:07,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576844503] [2020-10-29 13:58:07,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:58:07,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:58:07,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041233127] [2020-10-29 13:58:07,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:58:07,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:58:07,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:58:07,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:58:07,827 INFO L87 Difference]: Start difference. First operand 10515 states and 16122 transitions. Second operand 5 states. [2020-10-29 13:58:09,445 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:58:10,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:58:10,404 INFO L93 Difference]: Finished difference Result 29735 states and 45856 transitions. [2020-10-29 13:58:10,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:58:10,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-29 13:58:10,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:58:10,459 INFO L225 Difference]: With dead ends: 29735 [2020-10-29 13:58:10,459 INFO L226 Difference]: Without dead ends: 20124 [2020-10-29 13:58:10,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:58:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20124 states. [2020-10-29 13:58:12,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20124 to 20121. [2020-10-29 13:58:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20121 states. [2020-10-29 13:58:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20121 states to 20121 states and 30564 transitions. [2020-10-29 13:58:12,450 INFO L78 Accepts]: Start accepts. Automaton has 20121 states and 30564 transitions. Word has length 71 [2020-10-29 13:58:12,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:58:12,450 INFO L481 AbstractCegarLoop]: Abstraction has 20121 states and 30564 transitions. [2020-10-29 13:58:12,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:58:12,450 INFO L276 IsEmpty]: Start isEmpty. Operand 20121 states and 30564 transitions. [2020-10-29 13:58:12,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:58:12,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:58:12,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:58:12,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:58:12,472 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:58:12,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:58:12,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2024229633, now seen corresponding path program 1 times [2020-10-29 13:58:12,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:58:12,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027581512] [2020-10-29 13:58:12,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:58:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:12,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:12,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:12,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:13,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:13,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:58:13,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:58:13,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-10-29 13:58:13,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:13,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:13,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:58:13,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:58:13,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 13:58:13,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:13,648 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:58:13,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:58:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:13,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:13,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:13,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:58:13,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:58:13,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:58:13,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:13,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:13,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:58:13,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:58:13,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:58:13,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:58:13,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027581512] [2020-10-29 13:58:13,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:58:13,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:58:13,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148222508] [2020-10-29 13:58:13,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:58:13,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:58:13,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:58:13,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:58:13,711 INFO L87 Difference]: Start difference. First operand 20121 states and 30564 transitions. Second operand 5 states. [2020-10-29 13:58:15,622 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:58:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:58:17,473 INFO L93 Difference]: Finished difference Result 57921 states and 87991 transitions. [2020-10-29 13:58:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:58:17,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-29 13:58:17,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:58:17,585 INFO L225 Difference]: With dead ends: 57921 [2020-10-29 13:58:17,586 INFO L226 Difference]: Without dead ends: 38287 [2020-10-29 13:58:17,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:58:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38287 states. [2020-10-29 13:58:21,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38287 to 38280. [2020-10-29 13:58:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38280 states. [2020-10-29 13:58:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38280 states to 38280 states and 57575 transitions. [2020-10-29 13:58:21,365 INFO L78 Accepts]: Start accepts. Automaton has 38280 states and 57575 transitions. Word has length 72 [2020-10-29 13:58:21,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:58:21,365 INFO L481 AbstractCegarLoop]: Abstraction has 38280 states and 57575 transitions. [2020-10-29 13:58:21,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:58:21,365 INFO L276 IsEmpty]: Start isEmpty. Operand 38280 states and 57575 transitions. [2020-10-29 13:58:21,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:58:21,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:58:21,399 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] [2020-10-29 13:58:21,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:58:21,400 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:58:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:58:21,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1803743093, now seen corresponding path program 1 times [2020-10-29 13:58:21,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:58:21,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068402448] [2020-10-29 13:58:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:58:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:21,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:21,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:21,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:21,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:21,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:58:21,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:58:21,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-29 13:58:21,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:21,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:21,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:58:21,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-29 13:58:21,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 13:58:21,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:22,074 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:58:22,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:58:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:22,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:22,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:22,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:58:22,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:58:22,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:58:22,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:22,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:22,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:58:22,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:58:22,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:58:22,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:58:22,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068402448] [2020-10-29 13:58:22,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:58:22,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:58:22,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644192330] [2020-10-29 13:58:22,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:58:22,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:58:22,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:58:22,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:58:22,261 INFO L87 Difference]: Start difference. First operand 38280 states and 57575 transitions. Second operand 6 states. [2020-10-29 13:58:22,557 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:58:25,453 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-29 13:58:25,865 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-29 13:58:27,813 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:58:28,277 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-29 13:58:35,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:58:35,018 INFO L93 Difference]: Finished difference Result 168346 states and 260403 transitions. [2020-10-29 13:58:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:58:35,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:58:35,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:58:35,542 INFO L225 Difference]: With dead ends: 168346 [2020-10-29 13:58:35,542 INFO L226 Difference]: Without dead ends: 133079 [2020-10-29 13:58:35,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:58:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133079 states. [2020-10-29 13:58:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133079 to 69640. [2020-10-29 13:58:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69640 states. [2020-10-29 13:58:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69640 states to 69640 states and 105479 transitions. [2020-10-29 13:58:42,938 INFO L78 Accepts]: Start accepts. Automaton has 69640 states and 105479 transitions. Word has length 73 [2020-10-29 13:58:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:58:42,938 INFO L481 AbstractCegarLoop]: Abstraction has 69640 states and 105479 transitions. [2020-10-29 13:58:42,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:58:42,938 INFO L276 IsEmpty]: Start isEmpty. Operand 69640 states and 105479 transitions. [2020-10-29 13:58:42,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:58:42,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:58:42,975 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] [2020-10-29 13:58:42,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:58:42,975 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:58:42,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:58:42,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1828802427, now seen corresponding path program 1 times [2020-10-29 13:58:42,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:58:42,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050998556] [2020-10-29 13:58:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:58:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:43,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:43,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:43,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:43,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:43,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:43,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:58:43,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:58:43,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 690 [2020-10-29 13:58:43,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:43,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:43,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:58:43,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-29 13:58:43,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:58:43,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:44,219 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:58:44,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:58:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:44,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:44,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:44,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:58:44,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:58:44,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:58:44,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:44,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:44,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:58:44,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:58:44,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:58:44,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:58:44,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050998556] [2020-10-29 13:58:44,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:58:44,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:58:44,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911905395] [2020-10-29 13:58:44,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:58:44,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:58:44,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:58:44,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:58:44,265 INFO L87 Difference]: Start difference. First operand 69640 states and 105479 transitions. Second operand 5 states. [2020-10-29 13:58:44,574 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-29 13:58:48,324 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-29 13:58:57,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:58:57,811 INFO L93 Difference]: Finished difference Result 208145 states and 320301 transitions. [2020-10-29 13:58:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:58:57,811 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-29 13:58:57,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:58:58,128 INFO L225 Difference]: With dead ends: 208145 [2020-10-29 13:58:58,129 INFO L226 Difference]: Without dead ends: 141518 [2020-10-29 13:58:58,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:58:58,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141518 states. [2020-10-29 13:59:08,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141518 to 105032. [2020-10-29 13:59:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105032 states. [2020-10-29 13:59:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105032 states to 105032 states and 159719 transitions. [2020-10-29 13:59:08,878 INFO L78 Accepts]: Start accepts. Automaton has 105032 states and 159719 transitions. Word has length 74 [2020-10-29 13:59:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:59:08,878 INFO L481 AbstractCegarLoop]: Abstraction has 105032 states and 159719 transitions. [2020-10-29 13:59:08,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:59:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 105032 states and 159719 transitions. [2020-10-29 13:59:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:59:08,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:59:08,923 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] [2020-10-29 13:59:08,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:59:08,923 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:59:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:59:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1667702158, now seen corresponding path program 1 times [2020-10-29 13:59:08,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:59:08,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280545394] [2020-10-29 13:59:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:59:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:59:08,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:59:09,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:59:09,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:59:09,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:59:09,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:59:09,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:59:09,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:59:09,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-29 13:59:09,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:59:09,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:59:09,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:59:09,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-29 13:59:09,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:59:09,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:59:10,249 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:59:10,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:59:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:59:10,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:59:10,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:59:10,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:59:10,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:59:10,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:59:10,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:59:10,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:59:10,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:59:10,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:59:10,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:59:10,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:59:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:59:10,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280545394] [2020-10-29 13:59:10,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:59:10,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:59:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7729277] [2020-10-29 13:59:10,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:59:10,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:59:10,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:59:10,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:59:10,292 INFO L87 Difference]: Start difference. First operand 105032 states and 159719 transitions. Second operand 5 states. [2020-10-29 13:59:10,604 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-29 13:59:15,103 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-29 13:59:30,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:59:30,689 INFO L93 Difference]: Finished difference Result 305489 states and 468333 transitions. [2020-10-29 13:59:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:59:30,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-29 13:59:30,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:59:31,391 INFO L225 Difference]: With dead ends: 305489 [2020-10-29 13:59:31,391 INFO L226 Difference]: Without dead ends: 203470 [2020-10-29 13:59:31,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:59:31,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203470 states. [2020-10-29 13:59:46,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203470 to 153512. [2020-10-29 13:59:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153512 states. [2020-10-29 13:59:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153512 states to 153512 states and 232871 transitions. [2020-10-29 13:59:47,083 INFO L78 Accepts]: Start accepts. Automaton has 153512 states and 232871 transitions. Word has length 75 [2020-10-29 13:59:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:59:47,083 INFO L481 AbstractCegarLoop]: Abstraction has 153512 states and 232871 transitions. [2020-10-29 13:59:47,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:59:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 153512 states and 232871 transitions. [2020-10-29 13:59:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:59:47,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:59:47,126 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] [2020-10-29 13:59:47,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:59:47,127 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:59:47,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:59:47,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2018194619, now seen corresponding path program 1 times [2020-10-29 13:59:47,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:59:47,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674837869] [2020-10-29 13:59:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:59:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:59:47,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:59:47,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:59:47,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:59:48,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:59:48,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:59:48,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:59:48,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1089 [2020-10-29 13:59:48,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:59:48,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:59:48,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:59:48,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-29 13:59:48,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:59:48,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:59:48,561 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:59:48,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:59:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:59:48,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:59:48,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:59:48,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:59:48,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:59:48,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:59:48,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:59:48,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:59:48,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:59:48,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:59:48,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:59:48,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:59:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:59:48,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674837869] [2020-10-29 13:59:48,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:59:48,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:59:48,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226412615] [2020-10-29 13:59:48,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:59:48,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:59:48,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:59:48,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:59:48,598 INFO L87 Difference]: Start difference. First operand 153512 states and 232871 transitions. Second operand 5 states. [2020-10-29 13:59:48,874 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:59:52,290 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-29 13:59:52,918 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 14:00:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:00:10,169 INFO L93 Difference]: Finished difference Result 309905 states and 472013 transitions. [2020-10-29 14:00:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 14:00:10,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-29 14:00:10,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:00:10,789 INFO L225 Difference]: With dead ends: 309905 [2020-10-29 14:00:10,790 INFO L226 Difference]: Without dead ends: 202734 [2020-10-29 14:00:10,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 14:00:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202734 states.