/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/array-industry-pattern/array_ptr_single_elem_init-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 04:00:50,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 04:00:50,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 04:00:50,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 04:00:50,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 04:00:50,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 04:00:50,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 04:00:50,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 04:00:50,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 04:00:50,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 04:00:50,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 04:00:50,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 04:00:50,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 04:00:50,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 04:00:50,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 04:00:50,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 04:00:50,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 04:00:50,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 04:00:51,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 04:00:51,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 04:00:51,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 04:00:51,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 04:00:51,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 04:00:51,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 04:00:51,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 04:00:51,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 04:00:51,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 04:00:51,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 04:00:51,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 04:00:51,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 04:00:51,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 04:00:51,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 04:00:51,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 04:00:51,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 04:00:51,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 04:00:51,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 04:00:51,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 04:00:51,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 04:00:51,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 04:00:51,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 04:00:51,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 04:00:51,054 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 04:00:51,085 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 04:00:51,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 04:00:51,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 04:00:51,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 04:00:51,088 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 04:00:51,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 04:00:51,089 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 04:00:51,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 04:00:51,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 04:00:51,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 04:00:51,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 04:00:51,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 04:00:51,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 04:00:51,090 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 04:00:51,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 04:00:51,091 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 04:00:51,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 04:00:51,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 04:00:51,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 04:00:51,092 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 04:00:51,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 04:00:51,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 04:00:51,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 04:00:51,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 04:00:51,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 04:00:51,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 04:00:51,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 04:00:51,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 04:00:51,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 04:00:51,094 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 04:00:51,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 04:00:51,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 04:00:51,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 04:00:51,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 04:00:51,567 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 04:00:51,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-1.i [2020-10-29 04:00:51,645 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20d4267aa/0b9b333850514a9d81bd2ef9b93fced9/FLAGf7f5018b7 [2020-10-29 04:00:52,368 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 04:00:52,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-1.i [2020-10-29 04:00:52,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20d4267aa/0b9b333850514a9d81bd2ef9b93fced9/FLAGf7f5018b7 [2020-10-29 04:00:52,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20d4267aa/0b9b333850514a9d81bd2ef9b93fced9 [2020-10-29 04:00:52,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 04:00:52,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 04:00:52,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 04:00:52,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 04:00:52,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 04:00:52,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:00:52" (1/1) ... [2020-10-29 04:00:52,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10873ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:00:52, skipping insertion in model container [2020-10-29 04:00:52,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:00:52" (1/1) ... [2020-10-29 04:00:52,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 04:00:52,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 04:00:52,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 04:00:53,005 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 04:00:53,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 04:00:53,052 INFO L208 MainTranslator]: Completed translation [2020-10-29 04:00:53,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:00:53 WrapperNode [2020-10-29 04:00:53,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 04:00:53,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 04:00:53,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 04:00:53,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 04:00:53,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:00:53" (1/1) ... [2020-10-29 04:00:53,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:00:53" (1/1) ... [2020-10-29 04:00:53,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:00:53" (1/1) ... [2020-10-29 04:00:53,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:00:53" (1/1) ... [2020-10-29 04:00:53,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:00:53" (1/1) ... [2020-10-29 04:00:53,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:00:53" (1/1) ... [2020-10-29 04:00:53,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:00:53" (1/1) ... [2020-10-29 04:00:53,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 04:00:53,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 04:00:53,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 04:00:53,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 04:00:53,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:00:53" (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 04:00:53,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 04:00:53,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 04:00:53,244 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 04:00:53,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 04:00:53,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 04:00:53,245 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 04:00:53,245 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 04:00:53,246 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 04:00:53,246 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 04:00:53,246 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 04:00:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 04:00:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 04:00:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 04:00:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 04:00:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 04:00:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 04:00:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 04:00:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 04:00:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 04:00:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 04:00:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 04:00:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 04:00:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 04:00:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 04:00:53,802 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 04:00:53,803 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 04:00:53,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:00:53 BoogieIcfgContainer [2020-10-29 04:00:53,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 04:00:53,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 04:00:53,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 04:00:53,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 04:00:53,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:00:52" (1/3) ... [2020-10-29 04:00:53,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aefd4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:00:53, skipping insertion in model container [2020-10-29 04:00:53,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:00:53" (2/3) ... [2020-10-29 04:00:53,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aefd4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:00:53, skipping insertion in model container [2020-10-29 04:00:53,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:00:53" (3/3) ... [2020-10-29 04:00:53,816 INFO L111 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-1.i [2020-10-29 04:00:53,829 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 04:00:53,836 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 04:00:53,851 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 04:00:53,881 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 04:00:53,881 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 04:00:53,881 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 04:00:53,881 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 04:00:53,882 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 04:00:53,882 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 04:00:53,882 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 04:00:53,882 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 04:00:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-29 04:00:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 04:00:53,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:53,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:00:53,910 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:53,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1288471925, now seen corresponding path program 1 times [2020-10-29 04:00:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:53,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361144993] [2020-10-29 04:00:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:54,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:54,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:54,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:54,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 04:00:54,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 04:00:54,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-10-29 04:00:54,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:54,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:54,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 04:00:54,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:00:54,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 04:00:54,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 04:00:54,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:55,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:55,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:55,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:55,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:55,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 04:00:55,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:55,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:55,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:00:55,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:55,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:00:55,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:00:55,052 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 04:00:55,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361144993] [2020-10-29 04:00:55,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 04:00:55,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 04:00:55,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605106867] [2020-10-29 04:00:55,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 04:00:55,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:55,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 04:00:55,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 04:00:55,081 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-10-29 04:00:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:55,546 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-10-29 04:00:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 04:00:55,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-29 04:00:55,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:55,558 INFO L225 Difference]: With dead ends: 70 [2020-10-29 04:00:55,558 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 04:00:55,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-29 04:00:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 04:00:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-29 04:00:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 04:00:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-29 04:00:55,611 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 17 [2020-10-29 04:00:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:55,611 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-29 04:00:55,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 04:00:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-29 04:00:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 04:00:55,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:55,622 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:00:55,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 04:00:55,623 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:55,624 INFO L82 PathProgramCache]: Analyzing trace with hash 772836779, now seen corresponding path program 1 times [2020-10-29 04:00:55,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:55,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977629493] [2020-10-29 04:00:55,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:55,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:55,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:56,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:56,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 04:00:56,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 04:00:56,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-29 04:00:56,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:56,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:56,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 04:00:56,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:00:56,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 04:00:56,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 04:00:56,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:56,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:56,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:56,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:56,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:56,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-29 04:00:56,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:56,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:56,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:00:56,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:56,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:00:56,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 04:00:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 04:00:56,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977629493] [2020-10-29 04:00:56,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:56,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 04:00:56,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787593927] [2020-10-29 04:00:56,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 04:00:56,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:56,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 04:00:56,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 04:00:56,284 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2020-10-29 04:00:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:56,581 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2020-10-29 04:00:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 04:00:56,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-29 04:00:56,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:56,583 INFO L225 Difference]: With dead ends: 56 [2020-10-29 04:00:56,584 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 04:00:56,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 04:00:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 04:00:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2020-10-29 04:00:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 04:00:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-29 04:00:56,593 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-10-29 04:00:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:56,594 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-29 04:00:56,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 04:00:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-29 04:00:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 04:00:56,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:56,595 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] [2020-10-29 04:00:56,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 04:00:56,595 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:56,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1924609839, now seen corresponding path program 1 times [2020-10-29 04:00:56,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:56,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739605500] [2020-10-29 04:00:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:56,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:56,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:56,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:57,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:57,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:57,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 04:00:57,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:00:57,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-10-29 04:00:57,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:57,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:57,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 04:00:57,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:00:57,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 04:00:57,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:00:58,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:58,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:58,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:58,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:58,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:58,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 04:00:58,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:58,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:00:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:00:58,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:00:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:00:58,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739605500] [2020-10-29 04:00:58,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:58,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 04:00:58,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739141450] [2020-10-29 04:00:58,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 04:00:58,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:58,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 04:00:58,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 04:00:58,169 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 10 states. [2020-10-29 04:00:58,369 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-29 04:00:58,783 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-29 04:00:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:59,102 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2020-10-29 04:00:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 04:00:59,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-29 04:00:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:59,105 INFO L225 Difference]: With dead ends: 63 [2020-10-29 04:00:59,105 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 04:00:59,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:00:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 04:00:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-10-29 04:00:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 04:00:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2020-10-29 04:00:59,115 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 22 [2020-10-29 04:00:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:59,115 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2020-10-29 04:00:59,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 04:00:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2020-10-29 04:00:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 04:00:59,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:59,116 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] [2020-10-29 04:00:59,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 04:00:59,117 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1178608648, now seen corresponding path program 1 times [2020-10-29 04:00:59,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:59,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649329505] [2020-10-29 04:00:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:59,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:59,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:59,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:59,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:59,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:59,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:59,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:00,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:01,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:01,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 04:01:01,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 04:01:01,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2627 [2020-10-29 04:01:01,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:01,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:01,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 04:01:01,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:01,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 04:01:01,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:01:02,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:02,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:02,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:02,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:02,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:02,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 04:01:02,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:02,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:02,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:02,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:02,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:02,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:02,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649329505] [2020-10-29 04:01:02,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:02,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 04:01:02,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613780138] [2020-10-29 04:01:02,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 04:01:02,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:02,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 04:01:02,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 04:01:02,087 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand 8 states. [2020-10-29 04:01:02,297 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-29 04:01:02,421 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-29 04:01:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:02,773 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2020-10-29 04:01:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 04:01:02,774 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-29 04:01:02,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:02,775 INFO L225 Difference]: With dead ends: 84 [2020-10-29 04:01:02,775 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 04:01:02,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-29 04:01:02,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 04:01:02,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-10-29 04:01:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 04:01:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-29 04:01:02,785 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 23 [2020-10-29 04:01:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:02,786 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-29 04:01:02,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 04:01:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-29 04:01:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 04:01:02,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:02,787 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 04:01:02,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 04:01:02,788 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:02,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:02,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1664436056, now seen corresponding path program 1 times [2020-10-29 04:01:02,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:02,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049583585] [2020-10-29 04:01:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:02,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:02,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:02,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:02,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:02,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:03,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:05,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:05,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 04:01:05,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:01:05,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2357 [2020-10-29 04:01:05,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:05,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 04:01:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 04:01:05,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:01:05,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:05,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:05,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:05,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:05,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:05,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 04:01:05,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:05,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:05,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:05,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:05,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:05,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:05,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049583585] [2020-10-29 04:01:05,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:05,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 04:01:05,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295056112] [2020-10-29 04:01:05,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 04:01:05,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:05,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 04:01:05,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-29 04:01:05,616 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 10 states. [2020-10-29 04:01:06,219 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-29 04:01:06,454 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-29 04:01:07,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:07,106 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2020-10-29 04:01:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 04:01:07,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-29 04:01:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:07,111 INFO L225 Difference]: With dead ends: 78 [2020-10-29 04:01:07,111 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 04:01:07,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-29 04:01:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 04:01:07,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-29 04:01:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 04:01:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-10-29 04:01:07,135 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 26 [2020-10-29 04:01:07,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:07,135 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-10-29 04:01:07,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 04:01:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-10-29 04:01:07,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 04:01:07,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:07,137 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] [2020-10-29 04:01:07,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 04:01:07,137 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:07,138 INFO L82 PathProgramCache]: Analyzing trace with hash -616404014, now seen corresponding path program 2 times [2020-10-29 04:01:07,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:07,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377837131] [2020-10-29 04:01:07,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:07,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:07,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:07,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:07,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:07,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:08,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:09,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:09,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 04:01:09,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:01:09,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1948 [2020-10-29 04:01:09,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:09,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:09,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 04:01:09,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:09,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 04:01:09,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:09,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:09,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:09,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:09,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:09,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:09,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 04:01:09,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:09,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:09,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:09,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:09,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377837131] [2020-10-29 04:01:09,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:09,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 04:01:09,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075099307] [2020-10-29 04:01:09,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 04:01:09,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:09,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 04:01:09,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-29 04:01:09,649 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 12 states. [2020-10-29 04:01:10,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:10,819 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2020-10-29 04:01:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 04:01:10,820 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-29 04:01:10,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:10,822 INFO L225 Difference]: With dead ends: 140 [2020-10-29 04:01:10,823 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 04:01:10,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2020-10-29 04:01:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 04:01:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 64. [2020-10-29 04:01:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 04:01:10,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2020-10-29 04:01:10,863 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 27 [2020-10-29 04:01:10,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:10,865 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2020-10-29 04:01:10,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 04:01:10,865 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2020-10-29 04:01:10,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 04:01:10,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:10,867 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 04:01:10,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 04:01:10,868 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:10,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:10,868 INFO L82 PathProgramCache]: Analyzing trace with hash -283409467, now seen corresponding path program 1 times [2020-10-29 04:01:10,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:10,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085751299] [2020-10-29 04:01:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:10,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:10,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:11,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:11,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:11,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:12,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:13,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:13,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 04:01:13,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:01:13,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2806 [2020-10-29 04:01:13,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:13,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:13,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 04:01:13,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:13,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 04:01:13,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:14,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:14,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:14,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:14,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:14,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:14,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 04:01:14,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:14,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:14,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:14,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:14,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:14,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:14,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085751299] [2020-10-29 04:01:14,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:14,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 04:01:14,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43310910] [2020-10-29 04:01:14,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 04:01:14,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:14,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 04:01:14,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-29 04:01:14,167 INFO L87 Difference]: Start difference. First operand 64 states and 85 transitions. Second operand 11 states. [2020-10-29 04:01:14,393 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-29 04:01:14,537 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-29 04:01:14,881 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-29 04:01:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:15,404 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2020-10-29 04:01:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 04:01:15,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-29 04:01:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:15,407 INFO L225 Difference]: With dead ends: 147 [2020-10-29 04:01:15,407 INFO L226 Difference]: Without dead ends: 118 [2020-10-29 04:01:15,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-10-29 04:01:15,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-29 04:01:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 59. [2020-10-29 04:01:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 04:01:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2020-10-29 04:01:15,420 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 28 [2020-10-29 04:01:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:15,420 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2020-10-29 04:01:15,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 04:01:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2020-10-29 04:01:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 04:01:15,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:15,422 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:01:15,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 04:01:15,422 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:15,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:15,423 INFO L82 PathProgramCache]: Analyzing trace with hash 226931607, now seen corresponding path program 1 times [2020-10-29 04:01:15,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:15,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366079649] [2020-10-29 04:01:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:15,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:15,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:15,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:16,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:16,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:16,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:18,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:18,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 04:01:18,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:01:18,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3086 [2020-10-29 04:01:18,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:18,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:18,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 04:01:18,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:18,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 04:01:18,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:19,139 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-29 04:01:19,283 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-29 04:01:19,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:19,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:19,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:19,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:19,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:19,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 04:01:19,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:19,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:19,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:19,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:19,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:19,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:19,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366079649] [2020-10-29 04:01:19,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:19,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 04:01:19,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183477141] [2020-10-29 04:01:19,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 04:01:19,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:19,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 04:01:19,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-29 04:01:19,447 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand 13 states. [2020-10-29 04:01:19,668 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-29 04:01:20,170 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-29 04:01:20,929 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-29 04:01:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:21,415 INFO L93 Difference]: Finished difference Result 124 states and 162 transitions. [2020-10-29 04:01:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 04:01:21,416 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-29 04:01:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:21,417 INFO L225 Difference]: With dead ends: 124 [2020-10-29 04:01:21,418 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 04:01:21,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-29 04:01:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 04:01:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 61. [2020-10-29 04:01:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 04:01:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2020-10-29 04:01:21,438 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 28 [2020-10-29 04:01:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:21,438 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2020-10-29 04:01:21,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 04:01:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2020-10-29 04:01:21,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 04:01:21,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:21,440 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 04:01:21,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 04:01:21,440 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:21,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1052932071, now seen corresponding path program 2 times [2020-10-29 04:01:21,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:21,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784013388] [2020-10-29 04:01:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:21,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:21,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:21,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:21,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:21,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:22,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:22,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:22,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:24,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:26,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:26,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 04:01:26,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 04:01:26,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4939 [2020-10-29 04:01:26,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:26,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:26,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 04:01:26,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:26,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 04:01:26,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:27,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:27,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:27,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:27,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:27,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:27,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 04:01:27,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:27,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:27,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:27,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:27,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:27,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:27,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784013388] [2020-10-29 04:01:27,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:27,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 04:01:27,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888205243] [2020-10-29 04:01:27,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 04:01:27,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:27,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 04:01:27,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-29 04:01:27,052 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand 15 states. [2020-10-29 04:01:28,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:28,601 INFO L93 Difference]: Finished difference Result 130 states and 168 transitions. [2020-10-29 04:01:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 04:01:28,602 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-10-29 04:01:28,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:28,603 INFO L225 Difference]: With dead ends: 130 [2020-10-29 04:01:28,603 INFO L226 Difference]: Without dead ends: 126 [2020-10-29 04:01:28,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2020-10-29 04:01:28,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-29 04:01:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 78. [2020-10-29 04:01:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 04:01:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2020-10-29 04:01:28,621 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 28 [2020-10-29 04:01:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:28,621 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2020-10-29 04:01:28,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 04:01:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2020-10-29 04:01:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 04:01:28,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:28,623 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 04:01:28,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 04:01:28,623 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:28,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:28,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1553091483, now seen corresponding path program 1 times [2020-10-29 04:01:28,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:28,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154426513] [2020-10-29 04:01:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:28,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:28,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:28,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:29,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:29,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 04:01:29,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 04:01:29,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-29 04:01:29,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:29,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 04:01:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 04:01:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:29,840 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-29 04:01:30,072 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-29 04:01:30,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:30,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:30,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:30,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:30,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:30,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 04:01:30,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:30,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:30,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:30,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154426513] [2020-10-29 04:01:30,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:30,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 04:01:30,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458197372] [2020-10-29 04:01:30,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 04:01:30,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:30,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 04:01:30,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-29 04:01:30,253 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand 12 states. [2020-10-29 04:01:31,049 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-29 04:01:31,420 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 04:01:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:31,985 INFO L93 Difference]: Finished difference Result 126 states and 165 transitions. [2020-10-29 04:01:31,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 04:01:31,986 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-29 04:01:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:31,988 INFO L225 Difference]: With dead ends: 126 [2020-10-29 04:01:31,989 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 04:01:31,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-10-29 04:01:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 04:01:32,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 63. [2020-10-29 04:01:32,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 04:01:32,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-10-29 04:01:32,003 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 28 [2020-10-29 04:01:32,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:32,004 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-10-29 04:01:32,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 04:01:32,004 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-10-29 04:01:32,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 04:01:32,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:32,005 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] [2020-10-29 04:01:32,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 04:01:32,006 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:32,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:32,006 INFO L82 PathProgramCache]: Analyzing trace with hash 90191008, now seen corresponding path program 1 times [2020-10-29 04:01:32,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:32,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133797571] [2020-10-29 04:01:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:32,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:32,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:32,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:32,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:32,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:34,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:34,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 04:01:34,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 04:01:34,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2596 [2020-10-29 04:01:34,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:34,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:34,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 04:01:34,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:34,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 04:01:34,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:35,013 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-29 04:01:35,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:35,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:35,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:35,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:35,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:35,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 04:01:35,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:35,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:35,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:35,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:35,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:35,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:35,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133797571] [2020-10-29 04:01:35,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:35,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 04:01:35,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462455188] [2020-10-29 04:01:35,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 04:01:35,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:35,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 04:01:35,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:01:35,559 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 16 states. [2020-10-29 04:01:36,914 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-29 04:01:37,204 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-29 04:01:37,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:37,356 INFO L93 Difference]: Finished difference Result 148 states and 195 transitions. [2020-10-29 04:01:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 04:01:37,357 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-10-29 04:01:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:37,359 INFO L225 Difference]: With dead ends: 148 [2020-10-29 04:01:37,359 INFO L226 Difference]: Without dead ends: 102 [2020-10-29 04:01:37,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2020-10-29 04:01:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-29 04:01:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2020-10-29 04:01:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 04:01:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 91 transitions. [2020-10-29 04:01:37,388 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 91 transitions. Word has length 29 [2020-10-29 04:01:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:37,389 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 91 transitions. [2020-10-29 04:01:37,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 04:01:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 91 transitions. [2020-10-29 04:01:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 04:01:37,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:37,393 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 04:01:37,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 04:01:37,394 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:37,395 INFO L82 PathProgramCache]: Analyzing trace with hash -727457442, now seen corresponding path program 1 times [2020-10-29 04:01:37,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:37,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601096343] [2020-10-29 04:01:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:37,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:37,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:37,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:37,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:37,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:39,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:39,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 04:01:39,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 04:01:39,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1742 [2020-10-29 04:01:39,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:39,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 04:01:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:39,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 04:01:39,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:39,771 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-29 04:01:40,001 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-29 04:01:40,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:40,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:40,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:40,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:40,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:40,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:01:40,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:40,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:40,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:40,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:40,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:40,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:40,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601096343] [2020-10-29 04:01:40,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:40,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 04:01:40,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503695159] [2020-10-29 04:01:40,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 04:01:40,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 04:01:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-29 04:01:40,198 INFO L87 Difference]: Start difference. First operand 68 states and 91 transitions. Second operand 14 states. [2020-10-29 04:01:40,406 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-29 04:01:40,554 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-29 04:01:40,964 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-29 04:01:41,972 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-29 04:01:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:42,495 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2020-10-29 04:01:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 04:01:42,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-29 04:01:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:42,497 INFO L225 Difference]: With dead ends: 108 [2020-10-29 04:01:42,497 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 04:01:42,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2020-10-29 04:01:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 04:01:42,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-10-29 04:01:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 04:01:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2020-10-29 04:01:42,516 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 29 [2020-10-29 04:01:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:42,518 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2020-10-29 04:01:42,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 04:01:42,518 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2020-10-29 04:01:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 04:01:42,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:42,528 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:01:42,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 04:01:42,529 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:42,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:42,529 INFO L82 PathProgramCache]: Analyzing trace with hash 977405987, now seen corresponding path program 1 times [2020-10-29 04:01:42,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:42,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096485659] [2020-10-29 04:01:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:42,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:42,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:42,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:42,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:42,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:42,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:44,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:45,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:45,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 04:01:45,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:01:45,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3130 [2020-10-29 04:01:45,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:45,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 04:01:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 04:01:45,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:45,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:45,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:45,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:45,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:45,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:45,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 04:01:45,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:45,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:45,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:45,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:45,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:45,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 04:01:45,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096485659] [2020-10-29 04:01:45,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:45,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 04:01:45,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276412065] [2020-10-29 04:01:45,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 04:01:45,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:45,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 04:01:45,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 04:01:45,879 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand 8 states. [2020-10-29 04:01:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:46,206 INFO L93 Difference]: Finished difference Result 98 states and 124 transitions. [2020-10-29 04:01:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 04:01:46,206 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-29 04:01:46,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:46,208 INFO L225 Difference]: With dead ends: 98 [2020-10-29 04:01:46,208 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 04:01:46,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-29 04:01:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 04:01:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-29 04:01:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 04:01:46,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2020-10-29 04:01:46,221 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 30 [2020-10-29 04:01:46,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:46,221 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2020-10-29 04:01:46,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 04:01:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2020-10-29 04:01:46,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 04:01:46,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:46,223 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-29 04:01:46,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 04:01:46,223 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:46,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1035647932, now seen corresponding path program 1 times [2020-10-29 04:01:46,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:46,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511167667] [2020-10-29 04:01:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:46,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:46,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:46,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:46,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:46,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:46,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:46,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:46,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:50,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:50,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 04:01:50,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 04:01:50,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4414 [2020-10-29 04:01:50,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:50,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:50,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 04:01:50,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:50,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 04:01:50,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:51,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:51,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:51,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:51,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:51,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:51,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 04:01:51,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:51,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:51,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:51,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:51,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:51,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:51,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511167667] [2020-10-29 04:01:51,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:51,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 04:01:51,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216915808] [2020-10-29 04:01:51,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 04:01:51,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:51,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 04:01:51,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-29 04:01:51,122 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand 11 states. [2020-10-29 04:01:51,353 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-10-29 04:01:51,708 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-29 04:01:52,163 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-29 04:01:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:52,940 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2020-10-29 04:01:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 04:01:52,941 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-29 04:01:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:52,942 INFO L225 Difference]: With dead ends: 93 [2020-10-29 04:01:52,943 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 04:01:52,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:01:52,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 04:01:52,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-10-29 04:01:52,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 04:01:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2020-10-29 04:01:52,953 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 31 [2020-10-29 04:01:52,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:52,953 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2020-10-29 04:01:52,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 04:01:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2020-10-29 04:01:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 04:01:52,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:52,954 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] [2020-10-29 04:01:52,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 04:01:52,955 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:52,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:52,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1516764791, now seen corresponding path program 1 times [2020-10-29 04:01:52,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:52,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895199731] [2020-10-29 04:01:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:52,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:52,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:53,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:53,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:53,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:53,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:53,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:54,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:54,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 04:01:54,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:01:54,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1468 [2020-10-29 04:01:54,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:54,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:54,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 04:01:54,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 04:01:54,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 04:01:54,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:54,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:54,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:54,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:54,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:54,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:54,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:01:54,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:54,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:54,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:01:54,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:54,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:01:54,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:54,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895199731] [2020-10-29 04:01:54,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:54,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 04:01:54,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518933483] [2020-10-29 04:01:54,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 04:01:54,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:54,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 04:01:54,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 04:01:54,633 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand 10 states. [2020-10-29 04:01:54,854 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-29 04:01:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:55,595 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2020-10-29 04:01:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 04:01:55,596 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-29 04:01:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:55,598 INFO L225 Difference]: With dead ends: 154 [2020-10-29 04:01:55,598 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 04:01:55,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-29 04:01:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 04:01:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 73. [2020-10-29 04:01:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 04:01:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-29 04:01:55,613 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 31 [2020-10-29 04:01:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:55,613 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-29 04:01:55,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 04:01:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-29 04:01:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 04:01:55,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:55,614 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 04:01:55,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 04:01:55,615 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:55,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:55,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1215842430, now seen corresponding path program 1 times [2020-10-29 04:01:55,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:55,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934363308] [2020-10-29 04:01:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:55,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:55,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:55,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:55,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:56,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:56,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:56,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:56,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:56,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:56,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:58,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:59,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:59,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:59,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:00,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:00,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 04:02:00,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 04:02:00,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 04:02:00,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:00,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:00,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 04:02:00,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 04:02:00,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 04:02:00,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:02:01,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:02:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:01,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:01,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:01,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:02:01,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:02:01,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:02:01,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:01,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:02:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:02:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:02:01,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:02:01,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934363308] [2020-10-29 04:02:01,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:02:01,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 04:02:01,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939499663] [2020-10-29 04:02:01,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 04:02:01,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:02:01,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 04:02:01,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-29 04:02:01,161 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 14 states. [2020-10-29 04:02:02,200 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-29 04:02:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:02:02,972 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2020-10-29 04:02:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 04:02:02,973 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-29 04:02:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:02:02,975 INFO L225 Difference]: With dead ends: 136 [2020-10-29 04:02:02,975 INFO L226 Difference]: Without dead ends: 132 [2020-10-29 04:02:02,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-10-29 04:02:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-29 04:02:02,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-10-29 04:02:02,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 04:02:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-10-29 04:02:02,995 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 32 [2020-10-29 04:02:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:02:02,995 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-10-29 04:02:02,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 04:02:02,995 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-10-29 04:02:02,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 04:02:02,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:02:02,996 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 04:02:02,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 04:02:02,997 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:02:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:02:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1084980160, now seen corresponding path program 1 times [2020-10-29 04:02:02,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:02:02,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153374748] [2020-10-29 04:02:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:02:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:03,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:03,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:03,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:03,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:03,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:03,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:03,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:03,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 04:02:03,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:02:03,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-29 04:02:03,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:03,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:03,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 04:02:03,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:02:03,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 04:02:03,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:04,356 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-29 04:02:04,520 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-29 04:02:04,731 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-29 04:02:05,372 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 105 [2020-10-29 04:02:05,899 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-10-29 04:02:06,460 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-29 04:02:06,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:02:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:06,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:06,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:06,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:02:06,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:02:06,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 04:02:06,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:06,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:06,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:02:06,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:02:06,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:02:06,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:02:06,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153374748] [2020-10-29 04:02:06,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:02:06,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 04:02:06,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641575331] [2020-10-29 04:02:06,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 04:02:06,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:02:06,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 04:02:06,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-29 04:02:06,740 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 13 states. [2020-10-29 04:02:07,568 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 78 [2020-10-29 04:02:08,452 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 96 [2020-10-29 04:02:08,964 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-10-29 04:02:10,486 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 112 [2020-10-29 04:02:11,960 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-29 04:02:13,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:02:13,223 INFO L93 Difference]: Finished difference Result 130 states and 161 transitions. [2020-10-29 04:02:13,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 04:02:13,223 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-29 04:02:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:02:13,224 INFO L225 Difference]: With dead ends: 130 [2020-10-29 04:02:13,225 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 04:02:13,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2020-10-29 04:02:13,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 04:02:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 70. [2020-10-29 04:02:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 04:02:13,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-10-29 04:02:13,241 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 32 [2020-10-29 04:02:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:02:13,241 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-10-29 04:02:13,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 04:02:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-10-29 04:02:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 04:02:13,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:02:13,242 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:02:13,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 04:02:13,242 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:02:13,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:02:13,243 INFO L82 PathProgramCache]: Analyzing trace with hash -197627798, now seen corresponding path program 2 times [2020-10-29 04:02:13,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:02:13,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69338411] [2020-10-29 04:02:13,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:02:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:13,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:13,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:13,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:13,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:14,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:14,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:15,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:15,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:17,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:17,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 04:02:17,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 04:02:17,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4010 [2020-10-29 04:02:17,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:17,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:17,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 04:02:17,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:02:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 04:02:17,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:17,856 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-29 04:02:18,165 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-10-29 04:02:18,478 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-10-29 04:02:18,805 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 68 [2020-10-29 04:02:19,140 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2020-10-29 04:02:19,647 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-29 04:02:20,221 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 76 [2020-10-29 04:02:20,738 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2020-10-29 04:02:20,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:02:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:20,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:20,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:20,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:02:20,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:02:20,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 04:02:20,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:20,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:20,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:02:20,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:02:20,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:02:20,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:02:21,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69338411] [2020-10-29 04:02:21,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:02:21,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 04:02:21,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952580144] [2020-10-29 04:02:21,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 04:02:21,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:02:21,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 04:02:21,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:02:21,036 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 16 states. [2020-10-29 04:02:21,834 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-29 04:02:22,229 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-29 04:02:22,806 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 70 [2020-10-29 04:02:23,569 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-10-29 04:02:24,042 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2020-10-29 04:02:24,417 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 04:02:24,775 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-29 04:02:25,637 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-29 04:02:26,493 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2020-10-29 04:02:27,241 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-29 04:02:28,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:02:28,124 INFO L93 Difference]: Finished difference Result 142 states and 184 transitions. [2020-10-29 04:02:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 04:02:28,125 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-29 04:02:28,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:02:28,126 INFO L225 Difference]: With dead ends: 142 [2020-10-29 04:02:28,127 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 04:02:28,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2020-10-29 04:02:28,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 04:02:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 81. [2020-10-29 04:02:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 04:02:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-10-29 04:02:28,146 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 33 [2020-10-29 04:02:28,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:02:28,146 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-10-29 04:02:28,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 04:02:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-10-29 04:02:28,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 04:02:28,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:02:28,147 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:02:28,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 04:02:28,147 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:02:28,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:02:28,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1477491476, now seen corresponding path program 3 times [2020-10-29 04:02:28,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:02:28,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581101326] [2020-10-29 04:02:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:02:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:28,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:28,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:28,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:28,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:28,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:29,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:29,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:29,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:30,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:32,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:32,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 04:02:32,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 04:02:32,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4514 [2020-10-29 04:02:32,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:32,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:32,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 04:02:32,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:02:32,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 04:02:32,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:33,061 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-10-29 04:02:33,241 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2020-10-29 04:02:33,417 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 31 [2020-10-29 04:02:33,600 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-10-29 04:02:33,753 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-10-29 04:02:34,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:02:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:34,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:34,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:34,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:02:34,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:02:34,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:02:34,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:34,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:34,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:02:34,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:02:34,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:02:34,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:02:34,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581101326] [2020-10-29 04:02:34,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:02:34,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 04:02:34,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14379802] [2020-10-29 04:02:34,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 04:02:34,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:02:34,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 04:02:34,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-29 04:02:34,395 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 18 states. [2020-10-29 04:02:35,255 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-29 04:02:36,274 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-29 04:02:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:02:37,235 INFO L93 Difference]: Finished difference Result 150 states and 193 transitions. [2020-10-29 04:02:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 04:02:37,239 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-29 04:02:37,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:02:37,240 INFO L225 Difference]: With dead ends: 150 [2020-10-29 04:02:37,240 INFO L226 Difference]: Without dead ends: 146 [2020-10-29 04:02:37,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 04:02:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-29 04:02:37,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 109. [2020-10-29 04:02:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-29 04:02:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2020-10-29 04:02:37,264 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 33 [2020-10-29 04:02:37,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:02:37,264 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2020-10-29 04:02:37,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 04:02:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2020-10-29 04:02:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 04:02:37,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:02:37,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:02:37,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 04:02:37,266 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:02:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:02:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1015276248, now seen corresponding path program 4 times [2020-10-29 04:02:37,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:02:37,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722044531] [2020-10-29 04:02:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:02:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:37,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:37,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:37,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:38,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:38,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:38,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:38,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:38,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:38,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:39,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:40,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:41,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:41,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 04:02:41,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 04:02:41,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4618 [2020-10-29 04:02:41,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:41,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:41,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 04:02:41,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:02:41,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 04:02:41,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:42,477 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-29 04:02:42,804 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-29 04:02:43,366 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2020-10-29 04:02:43,911 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2020-10-29 04:02:44,712 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2020-10-29 04:02:45,782 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2020-10-29 04:02:46,716 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2020-10-29 04:02:46,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:02:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:46,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:46,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:46,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:02:46,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:02:46,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:02:46,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:46,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:46,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:02:46,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:02:46,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:02:46,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:02:47,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722044531] [2020-10-29 04:02:47,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:02:47,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 04:02:47,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862723677] [2020-10-29 04:02:47,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 04:02:47,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:02:47,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 04:02:47,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 04:02:47,012 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand 15 states. [2020-10-29 04:02:47,326 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-29 04:02:47,733 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 24 [2020-10-29 04:02:48,488 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-29 04:02:49,848 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2020-10-29 04:02:51,337 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2020-10-29 04:02:52,540 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-29 04:02:53,816 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-29 04:02:54,476 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-29 04:02:57,221 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2020-10-29 04:02:59,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:02:59,146 INFO L93 Difference]: Finished difference Result 164 states and 219 transitions. [2020-10-29 04:02:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 04:02:59,147 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-29 04:02:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:02:59,150 INFO L225 Difference]: With dead ends: 164 [2020-10-29 04:02:59,151 INFO L226 Difference]: Without dead ends: 149 [2020-10-29 04:02:59,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2020-10-29 04:02:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-29 04:02:59,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 108. [2020-10-29 04:02:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-29 04:02:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 144 transitions. [2020-10-29 04:02:59,172 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 144 transitions. Word has length 33 [2020-10-29 04:02:59,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:02:59,173 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 144 transitions. [2020-10-29 04:02:59,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 04:02:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 144 transitions. [2020-10-29 04:02:59,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 04:02:59,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:02:59,174 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:02:59,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 04:02:59,174 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:02:59,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:02:59,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1611504982, now seen corresponding path program 2 times [2020-10-29 04:02:59,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:02:59,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478223682] [2020-10-29 04:02:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:02:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:59,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:59,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:59,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:59,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:00,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:00,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 04:03:00,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:03:00,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-29 04:03:00,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:00,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:00,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 04:03:00,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:03:00,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 04:03:00,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:01,859 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2020-10-29 04:03:02,998 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 76 [2020-10-29 04:03:05,185 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 99 [2020-10-29 04:03:06,558 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 99 [2020-10-29 04:03:06,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:03:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:06,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:06,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:06,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:03:06,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:03:06,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:03:06,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:06,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:06,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:03:06,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:03:06,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:03:06,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:03:06,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478223682] [2020-10-29 04:03:06,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:03:06,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 04:03:06,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819457809] [2020-10-29 04:03:06,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 04:03:06,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:03:06,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 04:03:06,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-10-29 04:03:06,839 INFO L87 Difference]: Start difference. First operand 108 states and 144 transitions. Second operand 15 states. [2020-10-29 04:03:07,086 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-29 04:03:08,781 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 85 [2020-10-29 04:03:10,830 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-29 04:03:12,144 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-29 04:03:16,632 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 124 DAG size of output: 118 [2020-10-29 04:03:20,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:03:20,636 INFO L93 Difference]: Finished difference Result 172 states and 226 transitions. [2020-10-29 04:03:20,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 04:03:20,638 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-29 04:03:20,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:03:20,640 INFO L225 Difference]: With dead ends: 172 [2020-10-29 04:03:20,640 INFO L226 Difference]: Without dead ends: 151 [2020-10-29 04:03:20,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2020-10-29 04:03:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-29 04:03:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-10-29 04:03:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-29 04:03:20,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 154 transitions. [2020-10-29 04:03:20,662 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 154 transitions. Word has length 33 [2020-10-29 04:03:20,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:03:20,662 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 154 transitions. [2020-10-29 04:03:20,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 04:03:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 154 transitions. [2020-10-29 04:03:20,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 04:03:20,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:03:20,663 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:03:20,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 04:03:20,663 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:03:20,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:03:20,664 INFO L82 PathProgramCache]: Analyzing trace with hash -186248659, now seen corresponding path program 5 times [2020-10-29 04:03:20,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:03:20,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231814625] [2020-10-29 04:03:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:03:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:20,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:20,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:20,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:21,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:21,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:23,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:23,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:25,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:25,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 04:03:25,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:03:25,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4715 [2020-10-29 04:03:25,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:25,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:25,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 04:03:25,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:03:25,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 04:03:25,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:25,592 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2020-10-29 04:03:25,813 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2020-10-29 04:03:26,165 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-29 04:03:26,462 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-29 04:03:26,614 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-29 04:03:26,796 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-29 04:03:27,065 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2020-10-29 04:03:27,285 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2020-10-29 04:03:27,514 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2020-10-29 04:03:27,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:03:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:27,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:27,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:27,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:03:27,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:03:27,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:03:27,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:27,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:27,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:03:27,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:03:27,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:03:27,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:03:27,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231814625] [2020-10-29 04:03:27,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:03:27,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 04:03:27,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502974943] [2020-10-29 04:03:27,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 04:03:27,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:03:27,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 04:03:27,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-29 04:03:27,907 INFO L87 Difference]: Start difference. First operand 114 states and 154 transitions. Second operand 19 states. [2020-10-29 04:03:28,957 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-29 04:03:29,425 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-29 04:03:29,691 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-29 04:03:30,024 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-29 04:03:30,274 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-29 04:03:30,594 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-29 04:03:30,903 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-10-29 04:03:31,233 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-29 04:03:31,513 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-29 04:03:31,847 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-29 04:03:32,311 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-29 04:03:32,738 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-29 04:03:32,896 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-29 04:03:33,105 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-29 04:03:33,373 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-29 04:03:33,559 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-29 04:03:33,831 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 04:03:34,055 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-29 04:03:34,611 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-29 04:03:35,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:03:35,058 INFO L93 Difference]: Finished difference Result 212 states and 273 transitions. [2020-10-29 04:03:35,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 04:03:35,062 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-10-29 04:03:35,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:03:35,064 INFO L225 Difference]: With dead ends: 212 [2020-10-29 04:03:35,064 INFO L226 Difference]: Without dead ends: 208 [2020-10-29 04:03:35,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=346, Invalid=1816, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 04:03:35,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-29 04:03:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 123. [2020-10-29 04:03:35,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 04:03:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 168 transitions. [2020-10-29 04:03:35,091 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 168 transitions. Word has length 34 [2020-10-29 04:03:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:03:35,091 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 168 transitions. [2020-10-29 04:03:35,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 04:03:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 168 transitions. [2020-10-29 04:03:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 04:03:35,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:03:35,092 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:03:35,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 04:03:35,093 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:03:35,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:03:35,093 INFO L82 PathProgramCache]: Analyzing trace with hash -45700049, now seen corresponding path program 1 times [2020-10-29 04:03:35,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:03:35,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12499708] [2020-10-29 04:03:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:03:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:35,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:35,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:35,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:35,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:35,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:36,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:37,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:37,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 04:03:37,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:03:37,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2621 [2020-10-29 04:03:37,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:37,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:37,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 04:03:37,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:03:37,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 04:03:37,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:38,254 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2020-10-29 04:03:38,545 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-29 04:03:39,004 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2020-10-29 04:03:39,387 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-29 04:03:39,756 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-29 04:03:40,069 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-29 04:03:40,361 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-29 04:03:40,639 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-29 04:03:40,912 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-29 04:03:41,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:03:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:41,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:41,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:41,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:03:41,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:03:41,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:03:41,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:41,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:41,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:03:41,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:03:41,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:03:41,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:03:41,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12499708] [2020-10-29 04:03:41,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:03:41,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 04:03:41,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285789316] [2020-10-29 04:03:41,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 04:03:41,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:03:41,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 04:03:41,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-29 04:03:41,214 INFO L87 Difference]: Start difference. First operand 123 states and 168 transitions. Second operand 17 states. [2020-10-29 04:03:41,684 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 58 [2020-10-29 04:03:42,467 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-10-29 04:03:42,663 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 26 [2020-10-29 04:03:43,388 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2020-10-29 04:03:43,895 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-29 04:03:44,260 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-29 04:03:44,935 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-29 04:03:45,125 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-29 04:03:46,385 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-29 04:03:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:03:47,498 INFO L93 Difference]: Finished difference Result 258 states and 346 transitions. [2020-10-29 04:03:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 04:03:47,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-29 04:03:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:03:47,502 INFO L225 Difference]: With dead ends: 258 [2020-10-29 04:03:47,502 INFO L226 Difference]: Without dead ends: 216 [2020-10-29 04:03:47,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 04:03:47,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-29 04:03:47,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 122. [2020-10-29 04:03:47,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 04:03:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 165 transitions. [2020-10-29 04:03:47,525 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 165 transitions. Word has length 34 [2020-10-29 04:03:47,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:03:47,525 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 165 transitions. [2020-10-29 04:03:47,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 04:03:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 165 transitions. [2020-10-29 04:03:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 04:03:47,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:03:47,526 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-29 04:03:47,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 04:03:47,526 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:03:47,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:03:47,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2094348798, now seen corresponding path program 2 times [2020-10-29 04:03:47,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:03:47,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331591141] [2020-10-29 04:03:47,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:03:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:47,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:47,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:47,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:47,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:47,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:47,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:48,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:48,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:48,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:50,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:50,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 04:03:50,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 04:03:50,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2689 [2020-10-29 04:03:50,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:50,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:50,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 04:03:50,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:03:50,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 04:03:50,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:50,773 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-29 04:03:51,004 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-29 04:03:51,326 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-29 04:03:51,794 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-29 04:03:52,257 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-29 04:03:52,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:03:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:52,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:52,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:52,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:03:52,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:03:52,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:03:52,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:52,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:03:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:03:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:03:52,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:03:52,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331591141] [2020-10-29 04:03:52,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:03:52,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 04:03:52,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943846293] [2020-10-29 04:03:52,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 04:03:52,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:03:52,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 04:03:52,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-29 04:03:52,508 INFO L87 Difference]: Start difference. First operand 122 states and 165 transitions. Second operand 13 states. [2020-10-29 04:03:53,970 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-10-29 04:03:55,495 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 111 DAG size of output: 77 [2020-10-29 04:03:59,010 WARN L193 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 103 DAG size of output: 84 [2020-10-29 04:04:00,206 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-29 04:04:00,914 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-29 04:04:01,832 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-29 04:04:02,630 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-29 04:04:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:03,389 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-10-29 04:04:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 04:04:03,391 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 04:04:03,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:03,392 INFO L225 Difference]: With dead ends: 170 [2020-10-29 04:04:03,393 INFO L226 Difference]: Without dead ends: 142 [2020-10-29 04:04:03,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-29 04:04:03,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-29 04:04:03,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 128. [2020-10-29 04:04:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-29 04:04:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 169 transitions. [2020-10-29 04:04:03,441 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 169 transitions. Word has length 35 [2020-10-29 04:04:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:03,441 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 169 transitions. [2020-10-29 04:04:03,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 04:04:03,441 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 169 transitions. [2020-10-29 04:04:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 04:04:03,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:03,442 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-29 04:04:03,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 04:04:03,442 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:03,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:03,443 INFO L82 PathProgramCache]: Analyzing trace with hash -140338037, now seen corresponding path program 2 times [2020-10-29 04:04:03,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:03,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270665193] [2020-10-29 04:04:03,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:03,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:03,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:03,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:03,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:03,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:03,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:03,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:04,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:04,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:04,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:05,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:05,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:05,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:05,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:05,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:05,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:05,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:06,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:06,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:06,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:06,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:08,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:08,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 04:04:08,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-29 04:04:08,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 04:04:08,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:08,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:08,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 04:04:08,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:08,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 04:04:08,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:08,843 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-10-29 04:04:09,031 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2020-10-29 04:04:09,423 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-10-29 04:04:09,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:10,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:10,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:10,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:10,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:10,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 04:04:10,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:10,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:10,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:10,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:10,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:10,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 04:04:10,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270665193] [2020-10-29 04:04:10,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:10,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 04:04:10,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727405167] [2020-10-29 04:04:10,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 04:04:10,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:10,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 04:04:10,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 04:04:10,040 INFO L87 Difference]: Start difference. First operand 128 states and 169 transitions. Second operand 12 states. [2020-10-29 04:04:10,769 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-29 04:04:11,004 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2020-10-29 04:04:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:11,986 INFO L93 Difference]: Finished difference Result 159 states and 205 transitions. [2020-10-29 04:04:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 04:04:11,988 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-29 04:04:11,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:11,990 INFO L225 Difference]: With dead ends: 159 [2020-10-29 04:04:11,990 INFO L226 Difference]: Without dead ends: 133 [2020-10-29 04:04:11,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-10-29 04:04:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-29 04:04:12,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 117. [2020-10-29 04:04:12,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-29 04:04:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 156 transitions. [2020-10-29 04:04:12,014 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 156 transitions. Word has length 36 [2020-10-29 04:04:12,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:12,014 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 156 transitions. [2020-10-29 04:04:12,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 04:04:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 156 transitions. [2020-10-29 04:04:12,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 04:04:12,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:12,015 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:12,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 04:04:12,015 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:12,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:12,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2043084682, now seen corresponding path program 3 times [2020-10-29 04:04:12,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:12,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737419524] [2020-10-29 04:04:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:12,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:12,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:12,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:12,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:12,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:12,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:12,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:13,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:13,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:14,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:14,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 04:04:14,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 04:04:14,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2920 [2020-10-29 04:04:14,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:14,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:14,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 04:04:14,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:14,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 04:04:14,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:15,404 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2020-10-29 04:04:15,649 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2020-10-29 04:04:15,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:15,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:15,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:15,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:15,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:15,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 04:04:15,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:15,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:15,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:15,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:15,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:15,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:04:15,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737419524] [2020-10-29 04:04:15,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:15,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 04:04:15,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870189027] [2020-10-29 04:04:15,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 04:04:15,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:15,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 04:04:15,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-29 04:04:15,900 INFO L87 Difference]: Start difference. First operand 117 states and 156 transitions. Second operand 14 states. [2020-10-29 04:04:16,386 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-29 04:04:16,544 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-10-29 04:04:18,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:18,504 INFO L93 Difference]: Finished difference Result 241 states and 318 transitions. [2020-10-29 04:04:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 04:04:18,507 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-29 04:04:18,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:18,510 INFO L225 Difference]: With dead ends: 241 [2020-10-29 04:04:18,510 INFO L226 Difference]: Without dead ends: 226 [2020-10-29 04:04:18,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2020-10-29 04:04:18,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-29 04:04:18,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 155. [2020-10-29 04:04:18,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-29 04:04:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 206 transitions. [2020-10-29 04:04:18,542 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 206 transitions. Word has length 36 [2020-10-29 04:04:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:18,542 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 206 transitions. [2020-10-29 04:04:18,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 04:04:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 206 transitions. [2020-10-29 04:04:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 04:04:18,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:18,543 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-29 04:04:18,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 04:04:18,544 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:18,544 INFO L82 PathProgramCache]: Analyzing trace with hash -884531919, now seen corresponding path program 3 times [2020-10-29 04:04:18,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:18,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910435580] [2020-10-29 04:04:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:18,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:18,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:18,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:18,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:18,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:19,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:19,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:19,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:20,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:20,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:21,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:21,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:22,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:22,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:22,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:23,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:23,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:23,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 04:04:23,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 04:04:23,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 04:04:23,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:23,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:23,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 04:04:23,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:23,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 04:04:23,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:23,935 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 21 [2020-10-29 04:04:24,071 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-10-29 04:04:24,219 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-10-29 04:04:24,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:24,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:24,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:24,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:24,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:24,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:04:24,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:24,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:24,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:04:24,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910435580] [2020-10-29 04:04:24,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:24,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 04:04:24,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099816279] [2020-10-29 04:04:24,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 04:04:24,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:24,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 04:04:24,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-29 04:04:24,856 INFO L87 Difference]: Start difference. First operand 155 states and 206 transitions. Second operand 18 states. [2020-10-29 04:04:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:28,261 INFO L93 Difference]: Finished difference Result 245 states and 320 transitions. [2020-10-29 04:04:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 04:04:28,264 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-29 04:04:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:28,267 INFO L225 Difference]: With dead ends: 245 [2020-10-29 04:04:28,267 INFO L226 Difference]: Without dead ends: 241 [2020-10-29 04:04:28,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 04:04:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-29 04:04:28,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 180. [2020-10-29 04:04:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 04:04:28,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 239 transitions. [2020-10-29 04:04:28,330 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 239 transitions. Word has length 37 [2020-10-29 04:04:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:28,330 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 239 transitions. [2020-10-29 04:04:28,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 04:04:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 239 transitions. [2020-10-29 04:04:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 04:04:28,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:28,333 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-29 04:04:28,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 04:04:28,333 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:28,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:28,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1604997043, now seen corresponding path program 2 times [2020-10-29 04:04:28,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:28,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514123219] [2020-10-29 04:04:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:28,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:28,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:28,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:28,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:28,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:28,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:29,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:30,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:30,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 04:04:30,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:04:30,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2229 [2020-10-29 04:04:30,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:30,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:30,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 04:04:30,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:30,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 04:04:30,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0