/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:38:41,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:38:41,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:38:41,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:38:41,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:38:41,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:38:41,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:38:41,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:38:41,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:38:41,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:38:41,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:38:41,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:38:41,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:38:41,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:38:41,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:38:41,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:38:41,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:38:41,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:38:41,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:38:41,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:38:41,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:38:41,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:38:41,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:38:41,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:38:41,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:38:41,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:38:41,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:38:41,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:38:41,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:38:41,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:38:41,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:38:41,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:38:41,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:38:41,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:38:41,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:38:41,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:38:41,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:38:41,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:38:41,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:38:41,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:38:41,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:38:41,897 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 13:38:41,947 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:38:41,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:38:41,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:38:41,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:38:41,952 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:38:41,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:38:41,953 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:38:41,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:38:41,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:38:41,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:38:41,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:38:41,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:38:41,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:38:41,955 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:38:41,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:38:41,955 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:38:41,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:38:41,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:38:41,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:38:41,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:38:41,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:38:41,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:38:41,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:38:41,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:38:41,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:38:41,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:38:41,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:38:41,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:38:41,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:38:41,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:38:42,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:38:42,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:38:42,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:38:42,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:38:42,353 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:38:42,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:38:42,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2e0c99cf/68b7c153f58d4b2f8e3bcdc024944990/FLAG58d2d3572 [2020-10-29 13:38:42,973 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:38:42,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:38:42,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2e0c99cf/68b7c153f58d4b2f8e3bcdc024944990/FLAG58d2d3572 [2020-10-29 13:38:43,322 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2e0c99cf/68b7c153f58d4b2f8e3bcdc024944990 [2020-10-29 13:38:43,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:38:43,332 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:38:43,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:38:43,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:38:43,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:38:43,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:38:43" (1/1) ... [2020-10-29 13:38:43,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb7ed9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:43, skipping insertion in model container [2020-10-29 13:38:43,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:38:43" (1/1) ... [2020-10-29 13:38:43,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:38:43,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:38:43,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:38:43,653 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:38:43,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:38:43,745 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:38:43,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:43 WrapperNode [2020-10-29 13:38:43,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:38:43,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:38:43,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:38:43,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:38:43,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:43" (1/1) ... [2020-10-29 13:38:43,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:43" (1/1) ... [2020-10-29 13:38:43,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:43" (1/1) ... [2020-10-29 13:38:43,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:43" (1/1) ... [2020-10-29 13:38:43,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:43" (1/1) ... [2020-10-29 13:38:43,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:43" (1/1) ... [2020-10-29 13:38:43,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:43" (1/1) ... [2020-10-29 13:38:43,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:38:43,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:38:43,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:38:43,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:38:43,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:43" (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 13:38:43,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:38:43,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:38:43,874 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:38:43,875 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:38:43,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:38:43,876 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:38:43,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:38:43,876 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:38:43,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:38:43,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:38:43,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:38:43,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:38:43,878 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:38:43,878 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:38:43,878 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:38:43,880 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:38:43,881 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:38:43,881 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:38:43,881 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:38:43,881 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:38:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:38:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:38:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:38:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:38:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:38:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:38:43,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:38:43,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:38:44,685 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:38:44,685 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:38:44,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:38:44 BoogieIcfgContainer [2020-10-29 13:38:44,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:38:44,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:38:44,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:38:44,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:38:44,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:38:43" (1/3) ... [2020-10-29 13:38:44,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c011785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:38:44, skipping insertion in model container [2020-10-29 13:38:44,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:43" (2/3) ... [2020-10-29 13:38:44,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c011785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:38:44, skipping insertion in model container [2020-10-29 13:38:44,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:38:44" (3/3) ... [2020-10-29 13:38:44,701 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:38:44,714 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:38:44,723 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:38:44,736 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:38:44,774 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:38:44,775 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:38:44,775 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:38:44,775 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:38:44,775 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:38:44,775 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:38:44,775 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:38:44,775 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:38:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2020-10-29 13:38:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 13:38:44,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:44,800 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] [2020-10-29 13:38:44,800 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:44,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:44,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1951126501, now seen corresponding path program 1 times [2020-10-29 13:38:44,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:44,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213494665] [2020-10-29 13:38:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:45,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:45,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:45,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:46,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:46,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 13:38:46,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:38:46,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1746 [2020-10-29 13:38:46,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:46,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:46,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:46,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:38:46,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:38:46,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:38:47,042 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:38:47,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:47,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:47,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:47,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:47,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:47,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:38:47,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:47,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:47,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:47,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:47,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:47,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:38:47,094 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 13:38:47,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213494665] [2020-10-29 13:38:47,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:47,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:38:47,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863495940] [2020-10-29 13:38:47,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:47,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:47,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:47,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:47,120 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 6 states. [2020-10-29 13:38:47,383 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:38:47,995 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:38:48,140 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:38:48,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:48,173 INFO L93 Difference]: Finished difference Result 347 states and 539 transitions. [2020-10-29 13:38:48,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:38:48,175 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-29 13:38:48,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:48,188 INFO L225 Difference]: With dead ends: 347 [2020-10-29 13:38:48,188 INFO L226 Difference]: Without dead ends: 264 [2020-10-29 13:38:48,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:38:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-29 13:38:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 141. [2020-10-29 13:38:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-29 13:38:48,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 208 transitions. [2020-10-29 13:38:48,256 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 208 transitions. Word has length 42 [2020-10-29 13:38:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:48,256 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 208 transitions. [2020-10-29 13:38:48,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 208 transitions. [2020-10-29 13:38:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 13:38:48,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:48,260 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] [2020-10-29 13:38:48,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:38:48,260 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:48,261 INFO L82 PathProgramCache]: Analyzing trace with hash -219303387, now seen corresponding path program 1 times [2020-10-29 13:38:48,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:48,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503374467] [2020-10-29 13:38:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:48,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:48,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:48,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:48,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:48,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 13:38:48,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:38:48,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 547 [2020-10-29 13:38:48,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:48,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:38:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:38:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 13:38:48,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:38:49,031 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:38:49,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:49,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:49,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:49,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:49,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:49,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:38:49,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:49,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:49,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:49,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:49,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:49,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:38:49,064 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 13:38:49,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503374467] [2020-10-29 13:38:49,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:49,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:38:49,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453157287] [2020-10-29 13:38:49,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:38:49,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:49,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:38:49,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:38:49,068 INFO L87 Difference]: Start difference. First operand 141 states and 208 transitions. Second operand 4 states. [2020-10-29 13:38:49,283 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:38:49,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:49,839 INFO L93 Difference]: Finished difference Result 343 states and 524 transitions. [2020-10-29 13:38:49,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:38:49,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-29 13:38:49,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:49,849 INFO L225 Difference]: With dead ends: 343 [2020-10-29 13:38:49,849 INFO L226 Difference]: Without dead ends: 226 [2020-10-29 13:38:49,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:38:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-29 13:38:49,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2020-10-29 13:38:49,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-29 13:38:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 336 transitions. [2020-10-29 13:38:49,901 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 336 transitions. Word has length 43 [2020-10-29 13:38:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:49,901 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 336 transitions. [2020-10-29 13:38:49,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:38:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 336 transitions. [2020-10-29 13:38:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 13:38:49,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:49,904 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] [2020-10-29 13:38:49,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:38:49,904 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:49,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1874444095, now seen corresponding path program 1 times [2020-10-29 13:38:49,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:49,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87789697] [2020-10-29 13:38:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:49,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:50,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:50,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:50,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 13:38:50,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:38:50,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-29 13:38:50,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:50,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:50,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:38:50,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:38:50,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 13:38:50,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:50,397 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:38:50,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:50,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:50,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:50,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:50,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:50,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:38:50,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:50,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:50,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:50,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:50,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:50,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:50,447 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 13:38:50,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87789697] [2020-10-29 13:38:50,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:50,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:38:50,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541954768] [2020-10-29 13:38:50,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:38:50,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:50,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:38:50,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:38:50,451 INFO L87 Difference]: Start difference. First operand 223 states and 336 transitions. Second operand 4 states. [2020-10-29 13:38:50,622 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:38:51,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:51,013 INFO L93 Difference]: Finished difference Result 557 states and 856 transitions. [2020-10-29 13:38:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:38:51,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-29 13:38:51,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:51,016 INFO L225 Difference]: With dead ends: 557 [2020-10-29 13:38:51,017 INFO L226 Difference]: Without dead ends: 358 [2020-10-29 13:38:51,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:38:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-29 13:38:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 355. [2020-10-29 13:38:51,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-29 13:38:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 538 transitions. [2020-10-29 13:38:51,077 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 538 transitions. Word has length 44 [2020-10-29 13:38:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:51,078 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 538 transitions. [2020-10-29 13:38:51,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:38:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 538 transitions. [2020-10-29 13:38:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 13:38:51,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:51,086 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] [2020-10-29 13:38:51,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:38:51,086 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:51,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:51,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1692380302, now seen corresponding path program 1 times [2020-10-29 13:38:51,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:51,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787968181] [2020-10-29 13:38:51,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:51,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:51,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:51,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:51,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 13:38:51,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:38:51,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-29 13:38:51,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:51,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:51,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:51,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:38:51,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:38:51,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-29 13:38:51,835 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:38:51,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:51,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:51,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:51,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:51,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:51,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:38:51,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:51,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:51,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:51,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:51,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:51,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:51,888 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 13:38:51,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787968181] [2020-10-29 13:38:51,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:51,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:38:51,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236875272] [2020-10-29 13:38:51,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:51,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:51,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:51,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:51,893 INFO L87 Difference]: Start difference. First operand 355 states and 538 transitions. Second operand 6 states. [2020-10-29 13:38:52,511 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:38:52,692 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:38:52,878 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:38:53,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:53,228 INFO L93 Difference]: Finished difference Result 1236 states and 1896 transitions. [2020-10-29 13:38:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:38:53,228 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-29 13:38:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:53,235 INFO L225 Difference]: With dead ends: 1236 [2020-10-29 13:38:53,235 INFO L226 Difference]: Without dead ends: 905 [2020-10-29 13:38:53,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:38:53,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2020-10-29 13:38:53,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 899. [2020-10-29 13:38:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2020-10-29 13:38:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1370 transitions. [2020-10-29 13:38:53,308 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1370 transitions. Word has length 45 [2020-10-29 13:38:53,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:53,309 INFO L481 AbstractCegarLoop]: Abstraction has 899 states and 1370 transitions. [2020-10-29 13:38:53,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:53,309 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1370 transitions. [2020-10-29 13:38:53,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 13:38:53,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:53,311 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] [2020-10-29 13:38:53,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:38:53,311 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:53,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1655164721, now seen corresponding path program 1 times [2020-10-29 13:38:53,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:53,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874023035] [2020-10-29 13:38:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:53,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:53,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:53,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:53,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 13:38:53,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:38:53,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-29 13:38:53,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:53,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:53,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:38:53,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 13:38:53,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 13:38:53,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:38:53,723 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:38:53,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:53,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:53,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:53,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:53,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:53,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:38:53,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:53,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:53,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:53,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:53,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:53,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:53,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874023035] [2020-10-29 13:38:53,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:53,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:38:53,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007104227] [2020-10-29 13:38:53,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:38:53,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:53,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:38:53,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:38:53,758 INFO L87 Difference]: Start difference. First operand 899 states and 1370 transitions. Second operand 4 states. [2020-10-29 13:38:53,940 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:38:54,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:54,515 INFO L93 Difference]: Finished difference Result 2337 states and 3558 transitions. [2020-10-29 13:38:54,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:38:54,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-29 13:38:54,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:54,525 INFO L225 Difference]: With dead ends: 2337 [2020-10-29 13:38:54,525 INFO L226 Difference]: Without dead ends: 1462 [2020-10-29 13:38:54,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:38:54,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2020-10-29 13:38:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1459. [2020-10-29 13:38:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1459 states. [2020-10-29 13:38:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 2186 transitions. [2020-10-29 13:38:54,631 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 2186 transitions. Word has length 47 [2020-10-29 13:38:54,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:54,631 INFO L481 AbstractCegarLoop]: Abstraction has 1459 states and 2186 transitions. [2020-10-29 13:38:54,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:38:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 2186 transitions. [2020-10-29 13:38:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 13:38:54,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:54,634 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] [2020-10-29 13:38:54,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:38:54,634 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:54,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:54,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1369172087, now seen corresponding path program 1 times [2020-10-29 13:38:54,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:54,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824819756] [2020-10-29 13:38:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:54,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:54,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:55,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:55,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 13:38:55,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:38:55,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-29 13:38:55,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:55,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:55,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:55,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:38:55,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:38:55,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:38:55,297 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:38:55,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:55,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:55,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:55,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:55,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:55,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:38:55,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:55,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:55,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:38:55,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:55,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:38:55,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:55,348 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 13:38:55,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824819756] [2020-10-29 13:38:55,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:55,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:38:55,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142961297] [2020-10-29 13:38:55,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:55,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:55,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:55,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:55,354 INFO L87 Difference]: Start difference. First operand 1459 states and 2186 transitions. Second operand 6 states. [2020-10-29 13:38:55,574 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:38:56,169 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:38:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:56,361 INFO L93 Difference]: Finished difference Result 4329 states and 6510 transitions. [2020-10-29 13:38:56,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:38:56,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-29 13:38:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:56,377 INFO L225 Difference]: With dead ends: 4329 [2020-10-29 13:38:56,378 INFO L226 Difference]: Without dead ends: 2894 [2020-10-29 13:38:56,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:38:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2020-10-29 13:38:56,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 2891. [2020-10-29 13:38:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2891 states. [2020-10-29 13:38:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 4314 transitions. [2020-10-29 13:38:56,599 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 4314 transitions. Word has length 47 [2020-10-29 13:38:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:56,599 INFO L481 AbstractCegarLoop]: Abstraction has 2891 states and 4314 transitions. [2020-10-29 13:38:56,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:56,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 4314 transitions. [2020-10-29 13:38:56,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 13:38:56,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:56,600 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] [2020-10-29 13:38:56,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:38:56,601 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:56,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:56,601 INFO L82 PathProgramCache]: Analyzing trace with hash 240669212, now seen corresponding path program 1 times [2020-10-29 13:38:56,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:56,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405360763] [2020-10-29 13:38:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:56,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:56,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:56,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 13:38:56,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:56,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-29 13:38:56,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:56,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:56,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:38:56,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-29 13:38:56,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:38:56,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:57,010 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:38:57,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:57,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:57,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:57,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:57,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:57,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:38:57,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:57,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:57,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:57,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:57,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:57,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:57,036 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 13:38:57,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405360763] [2020-10-29 13:38:57,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:57,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:38:57,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579398039] [2020-10-29 13:38:57,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:38:57,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:38:57,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:38:57,039 INFO L87 Difference]: Start difference. First operand 2891 states and 4314 transitions. Second operand 5 states. [2020-10-29 13:38:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:57,902 INFO L93 Difference]: Finished difference Result 5950 states and 8796 transitions. [2020-10-29 13:38:57,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:38:57,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-29 13:38:57,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:57,933 INFO L225 Difference]: With dead ends: 5950 [2020-10-29 13:38:57,934 INFO L226 Difference]: Without dead ends: 5947 [2020-10-29 13:38:57,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5947 states. [2020-10-29 13:38:58,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5947 to 3083. [2020-10-29 13:38:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3083 states. [2020-10-29 13:38:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 4506 transitions. [2020-10-29 13:38:58,242 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 4506 transitions. Word has length 47 [2020-10-29 13:38:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:58,243 INFO L481 AbstractCegarLoop]: Abstraction has 3083 states and 4506 transitions. [2020-10-29 13:38:58,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:38:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 4506 transitions. [2020-10-29 13:38:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 13:38:58,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:58,244 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] [2020-10-29 13:38:58,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:38:58,244 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:58,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:58,245 INFO L82 PathProgramCache]: Analyzing trace with hash -831144449, now seen corresponding path program 1 times [2020-10-29 13:38:58,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:58,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882590101] [2020-10-29 13:38:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:58,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:58,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:58,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 13:38:58,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:58,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-29 13:38:58,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:58,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:58,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:38:58,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:38:58,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:38:58,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:58,548 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:38:58,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:58,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:58,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:58,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:58,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:58,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:38:58,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:58,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:58,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:58,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:58,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:58,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:58,581 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 13:38:58,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882590101] [2020-10-29 13:38:58,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:58,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:38:58,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078783919] [2020-10-29 13:38:58,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:38:58,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:58,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:38:58,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:38:58,583 INFO L87 Difference]: Start difference. First operand 3083 states and 4506 transitions. Second operand 4 states. [2020-10-29 13:38:58,757 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:38:59,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:59,444 INFO L93 Difference]: Finished difference Result 7403 states and 10818 transitions. [2020-10-29 13:38:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:38:59,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-29 13:38:59,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:59,468 INFO L225 Difference]: With dead ends: 7403 [2020-10-29 13:38:59,469 INFO L226 Difference]: Without dead ends: 4344 [2020-10-29 13:38:59,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:38:59,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2020-10-29 13:38:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 4301. [2020-10-29 13:38:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4301 states. [2020-10-29 13:38:59,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4301 states to 4301 states and 6214 transitions. [2020-10-29 13:38:59,851 INFO L78 Accepts]: Start accepts. Automaton has 4301 states and 6214 transitions. Word has length 48 [2020-10-29 13:38:59,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:59,852 INFO L481 AbstractCegarLoop]: Abstraction has 4301 states and 6214 transitions. [2020-10-29 13:38:59,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:38:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 4301 states and 6214 transitions. [2020-10-29 13:38:59,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:38:59,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:59,856 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:59,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:38:59,856 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:59,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:59,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1726605132, now seen corresponding path program 1 times [2020-10-29 13:38:59,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:59,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206975692] [2020-10-29 13:38:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:59,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:59,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:00,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:00,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:00,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:01,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:02,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:02,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:04,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:04,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:39:04,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:39:04,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:39:04,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:04,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:04,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:39:04,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:39:04,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:39:04,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:05,100 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:39:05,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:05,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:05,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:05,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:05,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:05,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:39:05,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:05,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:05,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:05,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 13:39:05,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206975692] [2020-10-29 13:39:05,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:39:05,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:39:05,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449028909] [2020-10-29 13:39:05,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:39:05,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:05,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:39:05,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:39:05,138 INFO L87 Difference]: Start difference. First operand 4301 states and 6214 transitions. Second operand 6 states. [2020-10-29 13:39:05,334 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:39:05,978 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:39:06,208 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:39:06,378 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:39:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:06,934 INFO L93 Difference]: Finished difference Result 10282 states and 15064 transitions. [2020-10-29 13:39:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:39:06,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-29 13:39:06,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:06,974 INFO L225 Difference]: With dead ends: 10282 [2020-10-29 13:39:06,974 INFO L226 Difference]: Without dead ends: 8239 [2020-10-29 13:39:06,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:39:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8239 states. [2020-10-29 13:39:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8239 to 7141. [2020-10-29 13:39:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7141 states. [2020-10-29 13:39:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7141 states to 7141 states and 10330 transitions. [2020-10-29 13:39:07,613 INFO L78 Accepts]: Start accepts. Automaton has 7141 states and 10330 transitions. Word has length 66 [2020-10-29 13:39:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:07,613 INFO L481 AbstractCegarLoop]: Abstraction has 7141 states and 10330 transitions. [2020-10-29 13:39:07,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:39:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 7141 states and 10330 transitions. [2020-10-29 13:39:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:39:07,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:07,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:07,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:39:07,617 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash -480403741, now seen corresponding path program 1 times [2020-10-29 13:39:07,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:07,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669218939] [2020-10-29 13:39:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:07,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:07,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:07,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:08,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:10,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:10,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:39:10,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:39:10,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2493 [2020-10-29 13:39:10,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:10,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:10,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:39:10,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:39:10,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:39:10,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:10,349 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:39:10,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:10,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:10,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:10,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:10,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:10,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:39:10,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:10,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:10,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:10,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:39:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 13:39:10,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669218939] [2020-10-29 13:39:10,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:39:10,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:39:10,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987925383] [2020-10-29 13:39:10,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:39:10,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:39:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:39:10,396 INFO L87 Difference]: Start difference. First operand 7141 states and 10330 transitions. Second operand 6 states. [2020-10-29 13:39:10,594 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:39:11,197 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:39:11,367 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:39:11,529 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:39:12,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:12,024 INFO L93 Difference]: Finished difference Result 10778 states and 15564 transitions. [2020-10-29 13:39:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:39:12,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-29 13:39:12,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:12,053 INFO L225 Difference]: With dead ends: 10778 [2020-10-29 13:39:12,053 INFO L226 Difference]: Without dead ends: 9255 [2020-10-29 13:39:12,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:39:12,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2020-10-29 13:39:12,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 7937. [2020-10-29 13:39:12,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7937 states. [2020-10-29 13:39:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7937 states to 7937 states and 11470 transitions. [2020-10-29 13:39:12,756 INFO L78 Accepts]: Start accepts. Automaton has 7937 states and 11470 transitions. Word has length 66 [2020-10-29 13:39:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:12,756 INFO L481 AbstractCegarLoop]: Abstraction has 7937 states and 11470 transitions. [2020-10-29 13:39:12,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:39:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 7937 states and 11470 transitions. [2020-10-29 13:39:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:39:12,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:12,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:12,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:39:12,760 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:12,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:12,760 INFO L82 PathProgramCache]: Analyzing trace with hash -774567043, now seen corresponding path program 1 times [2020-10-29 13:39:12,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:12,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361490966] [2020-10-29 13:39:12,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:12,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:12,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:12,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:14,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:14,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:39:14,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:39:14,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1742 [2020-10-29 13:39:14,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:14,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:14,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:39:14,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:39:14,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:39:14,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:14,750 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:39:14,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:14,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:14,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:14,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:14,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:14,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:39:14,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:14,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:14,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:14,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:14,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:14,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:39:14,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361490966] [2020-10-29 13:39:14,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:39:14,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 13:39:14,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631421077] [2020-10-29 13:39:14,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:39:14,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:14,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:39:14,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:39:14,787 INFO L87 Difference]: Start difference. First operand 7937 states and 11470 transitions. Second operand 5 states. [2020-10-29 13:39:14,988 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:39:15,736 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:39:15,918 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:39:16,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:16,611 INFO L93 Difference]: Finished difference Result 19126 states and 27720 transitions. [2020-10-29 13:39:16,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:39:16,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-29 13:39:16,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:16,645 INFO L225 Difference]: With dead ends: 19126 [2020-10-29 13:39:16,645 INFO L226 Difference]: Without dead ends: 13147 [2020-10-29 13:39:16,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:39:16,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13147 states. [2020-10-29 13:39:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13147 to 13045. [2020-10-29 13:39:17,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13045 states. [2020-10-29 13:39:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13045 states to 13045 states and 18630 transitions. [2020-10-29 13:39:17,729 INFO L78 Accepts]: Start accepts. Automaton has 13045 states and 18630 transitions. Word has length 67 [2020-10-29 13:39:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:17,730 INFO L481 AbstractCegarLoop]: Abstraction has 13045 states and 18630 transitions. [2020-10-29 13:39:17,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:39:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 13045 states and 18630 transitions. [2020-10-29 13:39:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:39:17,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:17,733 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:17,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:39:17,733 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:17,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2293266, now seen corresponding path program 1 times [2020-10-29 13:39:17,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:17,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152727787] [2020-10-29 13:39:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:17,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:17,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:17,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:18,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:18,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:18,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:20,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:22,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:22,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:39:22,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:39:22,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:39:22,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:22,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:22,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:39:22,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:39:22,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:39:22,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:22,978 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:39:22,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:22,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:22,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:22,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:22,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:22,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:39:22,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:22,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:22,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:22,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:22,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:22,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:39:23,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152727787] [2020-10-29 13:39:23,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:39:23,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:39:23,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485681494] [2020-10-29 13:39:23,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:39:23,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:23,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:39:23,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:39:23,015 INFO L87 Difference]: Start difference. First operand 13045 states and 18630 transitions. Second operand 6 states. [2020-10-29 13:39:23,205 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:39:23,887 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:39:24,585 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:39:24,760 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:39:25,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:25,031 INFO L93 Difference]: Finished difference Result 21364 states and 30540 transitions. [2020-10-29 13:39:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:39:25,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-29 13:39:25,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:25,071 INFO L225 Difference]: With dead ends: 21364 [2020-10-29 13:39:25,071 INFO L226 Difference]: Without dead ends: 17017 [2020-10-29 13:39:25,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:39:25,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17017 states. [2020-10-29 13:39:26,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17017 to 14277. [2020-10-29 13:39:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14277 states. [2020-10-29 13:39:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14277 states to 14277 states and 20324 transitions. [2020-10-29 13:39:26,212 INFO L78 Accepts]: Start accepts. Automaton has 14277 states and 20324 transitions. Word has length 68 [2020-10-29 13:39:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:26,212 INFO L481 AbstractCegarLoop]: Abstraction has 14277 states and 20324 transitions. [2020-10-29 13:39:26,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:39:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 14277 states and 20324 transitions. [2020-10-29 13:39:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:39:26,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:26,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:26,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:39:26,216 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:26,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:26,217 INFO L82 PathProgramCache]: Analyzing trace with hash 640369350, now seen corresponding path program 1 times [2020-10-29 13:39:26,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:26,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091101479] [2020-10-29 13:39:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:26,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:26,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:26,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:26,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:26,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:27,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:27,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:27,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:27,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:28,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:31,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:31,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:39:31,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:39:31,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:39:31,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:31,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:31,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:39:31,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:39:31,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:39:31,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:31,610 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:39:31,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:31,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:31,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:31,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:31,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:31,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:39:31,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:31,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:39:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:39:31,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:31,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091101479] [2020-10-29 13:39:31,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:39:31,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:39:31,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704069637] [2020-10-29 13:39:31,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:39:31,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:31,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:39:31,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:39:31,688 INFO L87 Difference]: Start difference. First operand 14277 states and 20324 transitions. Second operand 8 states. [2020-10-29 13:39:31,888 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:39:32,795 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:39:33,057 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:39:35,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:35,351 INFO L93 Difference]: Finished difference Result 53606 states and 75694 transitions. [2020-10-29 13:39:35,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:39:35,352 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-29 13:39:35,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:35,435 INFO L225 Difference]: With dead ends: 53606 [2020-10-29 13:39:35,436 INFO L226 Difference]: Without dead ends: 39355 [2020-10-29 13:39:35,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:39:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39355 states. [2020-10-29 13:39:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39355 to 20103. [2020-10-29 13:39:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20103 states. [2020-10-29 13:39:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20103 states to 20103 states and 28010 transitions. [2020-10-29 13:39:37,505 INFO L78 Accepts]: Start accepts. Automaton has 20103 states and 28010 transitions. Word has length 69 [2020-10-29 13:39:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:37,506 INFO L481 AbstractCegarLoop]: Abstraction has 20103 states and 28010 transitions. [2020-10-29 13:39:37,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:39:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 20103 states and 28010 transitions. [2020-10-29 13:39:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:39:37,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:37,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:37,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:39:37,510 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:37,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:37,511 INFO L82 PathProgramCache]: Analyzing trace with hash 469641831, now seen corresponding path program 1 times [2020-10-29 13:39:37,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:37,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424773599] [2020-10-29 13:39:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:37,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:37,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:37,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:37,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:37,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:37,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:37,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:38,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:38,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:40,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:40,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:40,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:41,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:41,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:42,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:42,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:42,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:42,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:42,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:39:42,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:39:42,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:39:42,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:42,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:42,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:39:42,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:39:42,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:39:42,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:42,844 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:39:42,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:42,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:42,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:42,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:42,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:42,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:39:42,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:42,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:42,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:39:42,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:42,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:39:42,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:42,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424773599] [2020-10-29 13:39:42,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:39:42,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:39:42,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733564519] [2020-10-29 13:39:42,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:39:42,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:42,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:39:42,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:39:42,893 INFO L87 Difference]: Start difference. First operand 20103 states and 28010 transitions. Second operand 8 states. [2020-10-29 13:39:43,099 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:39:44,256 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:39:44,578 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:39:47,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:47,447 INFO L93 Difference]: Finished difference Result 62474 states and 87024 transitions. [2020-10-29 13:39:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:39:47,450 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:39:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:47,541 INFO L225 Difference]: With dead ends: 62474 [2020-10-29 13:39:47,541 INFO L226 Difference]: Without dead ends: 42397 [2020-10-29 13:39:47,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:39:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42397 states. [2020-10-29 13:39:50,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42397 to 24342. [2020-10-29 13:39:50,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24342 states. [2020-10-29 13:39:50,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24342 states to 24342 states and 33233 transitions. [2020-10-29 13:39:50,443 INFO L78 Accepts]: Start accepts. Automaton has 24342 states and 33233 transitions. Word has length 70 [2020-10-29 13:39:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:50,443 INFO L481 AbstractCegarLoop]: Abstraction has 24342 states and 33233 transitions. [2020-10-29 13:39:50,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:39:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 24342 states and 33233 transitions. [2020-10-29 13:39:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:39:50,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:50,448 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:50,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:39:50,448 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:50,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:50,449 INFO L82 PathProgramCache]: Analyzing trace with hash 276008164, now seen corresponding path program 1 times [2020-10-29 13:39:50,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:50,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326529543] [2020-10-29 13:39:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:50,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:50,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:50,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:50,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:50,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:53,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:53,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:39:53,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:39:53,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3325 [2020-10-29 13:39:53,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:53,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:53,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:39:53,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:39:53,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:39:53,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:54,026 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:39:54,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:54,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:54,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:54,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:54,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:54,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:39:54,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:54,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:54,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:39:54,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:54,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:39:54,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:54,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326529543] [2020-10-29 13:39:54,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:39:54,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:39:54,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767663884] [2020-10-29 13:39:54,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:39:54,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:54,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:39:54,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:39:54,075 INFO L87 Difference]: Start difference. First operand 24342 states and 33233 transitions. Second operand 8 states. [2020-10-29 13:39:54,267 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:39:55,424 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:39:55,766 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:39:58,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:58,589 INFO L93 Difference]: Finished difference Result 46343 states and 63178 transitions. [2020-10-29 13:39:58,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:39:58,590 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-29 13:39:58,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:58,644 INFO L225 Difference]: With dead ends: 46343 [2020-10-29 13:39:58,644 INFO L226 Difference]: Without dead ends: 36273 [2020-10-29 13:39:58,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:39:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36273 states. [2020-10-29 13:40:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36273 to 25389. [2020-10-29 13:40:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25389 states. [2020-10-29 13:40:01,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25389 states to 25389 states and 34524 transitions. [2020-10-29 13:40:01,708 INFO L78 Accepts]: Start accepts. Automaton has 25389 states and 34524 transitions. Word has length 71 [2020-10-29 13:40:01,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:01,709 INFO L481 AbstractCegarLoop]: Abstraction has 25389 states and 34524 transitions. [2020-10-29 13:40:01,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:40:01,709 INFO L276 IsEmpty]: Start isEmpty. Operand 25389 states and 34524 transitions. [2020-10-29 13:40:01,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:40:01,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:01,713 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:01,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:40:01,713 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:01,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:01,713 INFO L82 PathProgramCache]: Analyzing trace with hash 684138933, now seen corresponding path program 1 times [2020-10-29 13:40:01,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:01,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024995388] [2020-10-29 13:40:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:01,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:01,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:01,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:01,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:01,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:02,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:02,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:02,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:02,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:02,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:05,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:05,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:05,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:05,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:05,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:05,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:06,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:06,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:06,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:40:06,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:40:06,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:40:06,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:06,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:06,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:40:06,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:40:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:40:06,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:07,071 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:40:07,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:07,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:07,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:07,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:07,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:07,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 13:40:07,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:07,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:07,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:40:07,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:07,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:40:07,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:07,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024995388] [2020-10-29 13:40:07,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:40:07,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:40:07,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907012896] [2020-10-29 13:40:07,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:40:07,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:07,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:40:07,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:40:07,148 INFO L87 Difference]: Start difference. First operand 25389 states and 34524 transitions. Second operand 9 states. [2020-10-29 13:40:07,389 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:40:09,045 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:40:09,427 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:40:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:17,334 INFO L93 Difference]: Finished difference Result 107864 states and 145360 transitions. [2020-10-29 13:40:17,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 13:40:17,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:40:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:17,424 INFO L225 Difference]: With dead ends: 107864 [2020-10-29 13:40:17,424 INFO L226 Difference]: Without dead ends: 82501 [2020-10-29 13:40:17,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2020-10-29 13:40:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82501 states. [2020-10-29 13:40:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82501 to 27132. [2020-10-29 13:40:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27132 states. [2020-10-29 13:40:21,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27132 states to 27132 states and 36716 transitions. [2020-10-29 13:40:21,257 INFO L78 Accepts]: Start accepts. Automaton has 27132 states and 36716 transitions. Word has length 72 [2020-10-29 13:40:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:21,257 INFO L481 AbstractCegarLoop]: Abstraction has 27132 states and 36716 transitions. [2020-10-29 13:40:21,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:40:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 27132 states and 36716 transitions. [2020-10-29 13:40:21,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:40:21,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:21,262 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:21,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:40:21,263 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:21,263 INFO L82 PathProgramCache]: Analyzing trace with hash 926545456, now seen corresponding path program 1 times [2020-10-29 13:40:21,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:21,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039070882] [2020-10-29 13:40:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:21,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:21,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:21,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:21,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:21,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:21,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:22,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:26,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:26,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:40:26,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:40:26,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:40:26,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:26,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:26,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:40:26,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:40:26,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:40:26,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:26,718 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:40:26,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:26,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:26,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:26,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:26,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:26,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:40:26,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:26,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:26,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:26,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:26,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:26,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:26,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039070882] [2020-10-29 13:40:26,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:40:26,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:40:26,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960382035] [2020-10-29 13:40:26,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:40:26,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:26,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:40:26,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:40:26,756 INFO L87 Difference]: Start difference. First operand 27132 states and 36716 transitions. Second operand 10 states. [2020-10-29 13:40:27,031 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:40:30,215 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:40:32,447 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:40:34,521 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:40:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:41,126 INFO L93 Difference]: Finished difference Result 90455 states and 121655 transitions. [2020-10-29 13:40:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 13:40:41,126 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-29 13:40:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:41,205 INFO L225 Difference]: With dead ends: 90455 [2020-10-29 13:40:41,205 INFO L226 Difference]: Without dead ends: 78229 [2020-10-29 13:40:41,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=249, Invalid=743, Unknown=0, NotChecked=0, Total=992 [2020-10-29 13:40:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78229 states. [2020-10-29 13:40:46,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78229 to 36080. [2020-10-29 13:40:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36080 states. [2020-10-29 13:40:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36080 states to 36080 states and 48888 transitions. [2020-10-29 13:40:46,759 INFO L78 Accepts]: Start accepts. Automaton has 36080 states and 48888 transitions. Word has length 72 [2020-10-29 13:40:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:46,759 INFO L481 AbstractCegarLoop]: Abstraction has 36080 states and 48888 transitions. [2020-10-29 13:40:46,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:40:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 36080 states and 48888 transitions. [2020-10-29 13:40:46,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:40:46,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:46,767 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:46,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:40:46,767 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:46,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:46,768 INFO L82 PathProgramCache]: Analyzing trace with hash 284736438, now seen corresponding path program 1 times [2020-10-29 13:40:46,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:46,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657063957] [2020-10-29 13:40:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:46,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:46,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:47,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:47,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:49,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:49,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:40:49,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:40:49,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3184 [2020-10-29 13:40:49,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:49,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:49,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:40:49,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:40:49,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:40:49,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:50,340 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:40:50,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:50,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:50,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:50,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:50,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:50,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:40:50,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:50,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:50,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:50,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:50,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:50,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:50,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657063957] [2020-10-29 13:40:50,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:40:50,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:40:50,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790809621] [2020-10-29 13:40:50,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:40:50,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:50,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:40:50,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:40:50,372 INFO L87 Difference]: Start difference. First operand 36080 states and 48888 transitions. Second operand 10 states. [2020-10-29 13:40:50,570 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:40:53,528 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 133 [2020-10-29 13:40:56,220 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 135 [2020-10-29 13:41:00,425 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:41:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:21,932 INFO L93 Difference]: Finished difference Result 223266 states and 299864 transitions. [2020-10-29 13:41:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:41:21,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-29 13:41:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:22,217 INFO L225 Difference]: With dead ends: 223266 [2020-10-29 13:41:22,217 INFO L226 Difference]: Without dead ends: 187212 [2020-10-29 13:41:22,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-29 13:41:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187212 states. [2020-10-29 13:41:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187212 to 91369. [2020-10-29 13:41:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91369 states. [2020-10-29 13:41:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91369 states to 91369 states and 122957 transitions. [2020-10-29 13:41:37,805 INFO L78 Accepts]: Start accepts. Automaton has 91369 states and 122957 transitions. Word has length 73 [2020-10-29 13:41:37,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:37,805 INFO L481 AbstractCegarLoop]: Abstraction has 91369 states and 122957 transitions. [2020-10-29 13:41:37,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:41:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 91369 states and 122957 transitions. [2020-10-29 13:41:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:41:37,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:37,812 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:37,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:41:37,812 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:37,813 INFO L82 PathProgramCache]: Analyzing trace with hash 855153019, now seen corresponding path program 1 times [2020-10-29 13:41:37,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:37,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687647206] [2020-10-29 13:41:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:38,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:40,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:40,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:40,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:40,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:42,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:42,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:41:42,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:41:42,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:41:42,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:42,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:42,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:41:42,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:41:42,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:41:42,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:43,022 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:41:43,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:43,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:43,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:43,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:43,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:43,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:41:43,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:43,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:43,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:43,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:43,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:43,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:43,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687647206] [2020-10-29 13:41:43,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:41:43,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:41:43,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789032469] [2020-10-29 13:41:43,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:41:43,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:43,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:41:43,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:41:43,052 INFO L87 Difference]: Start difference. First operand 91369 states and 122957 transitions. Second operand 6 states. [2020-10-29 13:41:43,230 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-29 13:41:47,850 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:41:52,922 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-29 13:42:20,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:20,723 INFO L93 Difference]: Finished difference Result 296449 states and 397243 transitions. [2020-10-29 13:42:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:42:20,723 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:42:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:21,126 INFO L225 Difference]: With dead ends: 296449 [2020-10-29 13:42:21,126 INFO L226 Difference]: Without dead ends: 213173 [2020-10-29 13:42:21,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:42:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213173 states.