/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:03:23,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:03:23,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:03:23,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:03:23,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:03:23,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:03:23,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:03:23,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:03:23,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:03:23,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:03:23,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:03:23,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:03:23,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:03:23,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:03:23,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:03:23,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:03:23,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:03:23,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:03:23,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:03:23,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:03:23,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:03:23,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:03:23,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:03:23,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:03:23,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:03:23,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:03:23,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:03:23,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:03:23,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:03:23,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:03:23,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:03:23,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:03:23,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:03:23,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:03:23,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:03:23,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:03:23,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:03:23,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:03:23,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:03:23,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:03:23,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:03:23,140 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:03:23,168 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:03:23,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:03:23,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:03:23,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:03:23,171 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:03:23,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:03:23,172 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:03:23,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:03:23,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:03:23,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:03:23,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:03:23,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:03:23,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:03:23,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:03:23,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:03:23,174 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:03:23,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:03:23,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:03:23,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:03:23,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:03:23,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:03:23,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:03:23,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:03:23,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:03:23,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:03:23,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:03:23,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:03:23,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:03:23,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:03:23,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:03:23,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:03:23,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:03:23,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:03:23,598 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:03:23,599 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:03:23,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:03:23,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c79000eb7/2f80497d07144020b6ba9c949ec99dc2/FLAG7191aab8b [2020-10-28 00:03:24,408 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:03:24,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:03:24,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c79000eb7/2f80497d07144020b6ba9c949ec99dc2/FLAG7191aab8b [2020-10-28 00:03:24,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c79000eb7/2f80497d07144020b6ba9c949ec99dc2 [2020-10-28 00:03:24,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:03:24,759 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:03:24,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:03:24,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:03:24,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:03:24,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:03:24" (1/1) ... [2020-10-28 00:03:24,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@707fd674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:24, skipping insertion in model container [2020-10-28 00:03:24,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:03:24" (1/1) ... [2020-10-28 00:03:24,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:03:24,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:03:25,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:03:25,120 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:03:25,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:03:25,204 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:03:25,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:25 WrapperNode [2020-10-28 00:03:25,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:03:25,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:03:25,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:03:25,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:03:25,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:25" (1/1) ... [2020-10-28 00:03:25,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:25" (1/1) ... [2020-10-28 00:03:25,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:25" (1/1) ... [2020-10-28 00:03:25,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:25" (1/1) ... [2020-10-28 00:03:25,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:25" (1/1) ... [2020-10-28 00:03:25,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:25" (1/1) ... [2020-10-28 00:03:25,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:25" (1/1) ... [2020-10-28 00:03:25,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:03:25,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:03:25,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:03:25,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:03:25,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:03:25,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:03:25,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:03:25,431 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:03:25,432 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:03:25,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:03:25,433 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:03:25,434 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:03:25,434 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:03:25,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:03:25,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:03:25,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:03:25,436 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:03:25,436 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:03:25,436 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:03:25,436 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:03:25,438 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:03:25,438 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:03:25,438 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:03:25,439 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:03:25,439 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:03:25,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:03:25,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:03:25,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:03:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:03:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:03:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:03:25,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:03:26,164 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:03:26,165 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:03:26,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:03:26 BoogieIcfgContainer [2020-10-28 00:03:26,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:03:26,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:03:26,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:03:26,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:03:26,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:03:24" (1/3) ... [2020-10-28 00:03:26,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@740b0afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:03:26, skipping insertion in model container [2020-10-28 00:03:26,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:25" (2/3) ... [2020-10-28 00:03:26,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@740b0afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:03:26, skipping insertion in model container [2020-10-28 00:03:26,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:03:26" (3/3) ... [2020-10-28 00:03:26,176 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:03:26,188 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:03:26,192 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:03:26,203 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:03:26,232 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:03:26,232 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:03:26,232 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:03:26,232 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:03:26,233 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:03:26,233 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:03:26,233 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:03:26,233 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:03:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2020-10-28 00:03:26,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 00:03:26,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:26,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:03:26,263 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:26,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:26,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1066806879, now seen corresponding path program 1 times [2020-10-28 00:03:26,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:26,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679436260] [2020-10-28 00:03:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:26,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:26,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:26,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:27,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:29,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:29,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 00:03:29,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:03:29,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2532 [2020-10-28 00:03:29,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:29,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:03:29,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:03:29,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:03:29,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 00:03:29,358 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:03:29,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:29,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:29,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:29,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:29,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:29,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:03:29,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:29,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:29,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:29,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:29,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:03:29,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679436260] [2020-10-28 00:03:29,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:29,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:03:29,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233157407] [2020-10-28 00:03:29,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:03:29,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:03:29,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:03:29,433 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 4 states. [2020-10-28 00:03:29,722 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:03:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:30,345 INFO L93 Difference]: Finished difference Result 212 states and 333 transitions. [2020-10-28 00:03:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:03:30,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-28 00:03:30,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:30,360 INFO L225 Difference]: With dead ends: 212 [2020-10-28 00:03:30,360 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 00:03:30,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:03:30,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 00:03:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-28 00:03:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 00:03:30,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 193 transitions. [2020-10-28 00:03:30,480 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 193 transitions. Word has length 42 [2020-10-28 00:03:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:30,481 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 193 transitions. [2020-10-28 00:03:30,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:03:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 193 transitions. [2020-10-28 00:03:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 00:03:30,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:30,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:03:30,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:03:30,485 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:30,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:30,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1738608199, now seen corresponding path program 1 times [2020-10-28 00:03:30,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:30,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498838003] [2020-10-28 00:03:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:30,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:30,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:30,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:31,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:31,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 00:03:31,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:03:31,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 983 [2020-10-28 00:03:31,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:31,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:03:31,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:03:31,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:03:31,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:03:31,826 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:03:31,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:31,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:31,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:31,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:31,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:31,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:03:31,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:31,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:31,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:31,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:31,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:03:31,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498838003] [2020-10-28 00:03:31,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:31,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:03:31,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676690923] [2020-10-28 00:03:31,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:03:31,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:31,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:03:31,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:03:31,893 INFO L87 Difference]: Start difference. First operand 131 states and 193 transitions. Second operand 4 states. [2020-10-28 00:03:32,140 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:03:32,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:32,612 INFO L93 Difference]: Finished difference Result 313 states and 479 transitions. [2020-10-28 00:03:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:03:32,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 00:03:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:32,616 INFO L225 Difference]: With dead ends: 313 [2020-10-28 00:03:32,616 INFO L226 Difference]: Without dead ends: 206 [2020-10-28 00:03:32,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:03:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-28 00:03:32,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2020-10-28 00:03:32,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-28 00:03:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 306 transitions. [2020-10-28 00:03:32,649 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 306 transitions. Word has length 43 [2020-10-28 00:03:32,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:32,649 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 306 transitions. [2020-10-28 00:03:32,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:03:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 306 transitions. [2020-10-28 00:03:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 00:03:32,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:32,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:03:32,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:03:32,655 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:32,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:32,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1753338934, now seen corresponding path program 1 times [2020-10-28 00:03:32,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:32,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803940491] [2020-10-28 00:03:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:32,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:32,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:33,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:33,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 00:03:33,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:03:33,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-28 00:03:33,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:33,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:03:33,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:03:33,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:03:33,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:33,346 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:03:33,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:33,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:33,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:33,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:33,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:33,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:03:33,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:33,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:33,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:33,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:33,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:03:33,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803940491] [2020-10-28 00:03:33,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:33,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:03:33,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519364364] [2020-10-28 00:03:33,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:03:33,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:33,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:03:33,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:03:33,397 INFO L87 Difference]: Start difference. First operand 203 states and 306 transitions. Second operand 4 states. [2020-10-28 00:03:33,626 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:03:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:34,071 INFO L93 Difference]: Finished difference Result 497 states and 766 transitions. [2020-10-28 00:03:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:03:34,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-28 00:03:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:34,075 INFO L225 Difference]: With dead ends: 497 [2020-10-28 00:03:34,075 INFO L226 Difference]: Without dead ends: 318 [2020-10-28 00:03:34,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:03:34,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-28 00:03:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 315. [2020-10-28 00:03:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-28 00:03:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 478 transitions. [2020-10-28 00:03:34,115 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 478 transitions. Word has length 44 [2020-10-28 00:03:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:34,116 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 478 transitions. [2020-10-28 00:03:34,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:03:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 478 transitions. [2020-10-28 00:03:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 00:03:34,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:34,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:03:34,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:03:34,118 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:34,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:34,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1266061178, now seen corresponding path program 1 times [2020-10-28 00:03:34,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:34,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678944991] [2020-10-28 00:03:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:34,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:34,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:34,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:34,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 00:03:34,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:03:34,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 824 [2020-10-28 00:03:34,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:03:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:03:34,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 00:03:34,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:35,209 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:03:35,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:35,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:35,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:35,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:35,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:35,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:03:35,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:35,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:03:35,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678944991] [2020-10-28 00:03:35,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:35,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:03:35,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989496001] [2020-10-28 00:03:35,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:03:35,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:35,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:03:35,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:03:35,249 INFO L87 Difference]: Start difference. First operand 315 states and 478 transitions. Second operand 6 states. [2020-10-28 00:03:35,486 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:03:36,035 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:03:36,212 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:03:36,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:36,273 INFO L93 Difference]: Finished difference Result 1479 states and 2294 transitions. [2020-10-28 00:03:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:03:36,273 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-28 00:03:36,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:36,281 INFO L225 Difference]: With dead ends: 1479 [2020-10-28 00:03:36,281 INFO L226 Difference]: Without dead ends: 1188 [2020-10-28 00:03:36,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:03:36,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2020-10-28 00:03:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 603. [2020-10-28 00:03:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-10-28 00:03:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 914 transitions. [2020-10-28 00:03:36,347 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 914 transitions. Word has length 45 [2020-10-28 00:03:36,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:36,348 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 914 transitions. [2020-10-28 00:03:36,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:03:36,348 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 914 transitions. [2020-10-28 00:03:36,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 00:03:36,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:36,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:03:36,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:03:36,350 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:36,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1167890461, now seen corresponding path program 1 times [2020-10-28 00:03:36,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:36,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685385911] [2020-10-28 00:03:36,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:36,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:36,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:36,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:36,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 00:03:36,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:03:36,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-28 00:03:36,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:36,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:03:36,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 00:03:36,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:03:36,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:37,029 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:03:37,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:37,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:37,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:37,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:37,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:37,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:03:37,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:37,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:37,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:37,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:37,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:03:37,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685385911] [2020-10-28 00:03:37,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:37,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:03:37,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449386865] [2020-10-28 00:03:37,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:03:37,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:37,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:03:37,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:03:37,060 INFO L87 Difference]: Start difference. First operand 603 states and 914 transitions. Second operand 5 states. [2020-10-28 00:03:37,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:37,664 INFO L93 Difference]: Finished difference Result 1214 states and 1836 transitions. [2020-10-28 00:03:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:03:37,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-28 00:03:37,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:37,672 INFO L225 Difference]: With dead ends: 1214 [2020-10-28 00:03:37,672 INFO L226 Difference]: Without dead ends: 1211 [2020-10-28 00:03:37,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:03:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2020-10-28 00:03:37,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 635. [2020-10-28 00:03:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-10-28 00:03:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 946 transitions. [2020-10-28 00:03:37,741 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 946 transitions. Word has length 46 [2020-10-28 00:03:37,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:37,741 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 946 transitions. [2020-10-28 00:03:37,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:03:37,742 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 946 transitions. [2020-10-28 00:03:37,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 00:03:37,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:37,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:03:37,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:03:37,743 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:37,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:37,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1546838185, now seen corresponding path program 1 times [2020-10-28 00:03:37,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:37,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900689348] [2020-10-28 00:03:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:37,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:37,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:38,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:38,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 00:03:38,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:03:38,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 386 [2020-10-28 00:03:38,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:38,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:03:38,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:03:38,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:03:38,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:38,389 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:03:38,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:38,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:38,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:38,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:38,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:38,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:03:38,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:38,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:38,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:03:38,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900689348] [2020-10-28 00:03:38,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:38,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:03:38,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23179323] [2020-10-28 00:03:38,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:03:38,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:38,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:03:38,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:03:38,433 INFO L87 Difference]: Start difference. First operand 635 states and 946 transitions. Second operand 6 states. [2020-10-28 00:03:39,130 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:03:39,402 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:03:39,621 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:03:40,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:40,086 INFO L93 Difference]: Finished difference Result 2204 states and 3280 transitions. [2020-10-28 00:03:40,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:03:40,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-28 00:03:40,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:40,096 INFO L225 Difference]: With dead ends: 2204 [2020-10-28 00:03:40,096 INFO L226 Difference]: Without dead ends: 1593 [2020-10-28 00:03:40,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:03:40,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2020-10-28 00:03:40,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1587. [2020-10-28 00:03:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1587 states. [2020-10-28 00:03:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2338 transitions. [2020-10-28 00:03:40,272 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2338 transitions. Word has length 47 [2020-10-28 00:03:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:40,273 INFO L481 AbstractCegarLoop]: Abstraction has 1587 states and 2338 transitions. [2020-10-28 00:03:40,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:03:40,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2338 transitions. [2020-10-28 00:03:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 00:03:40,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:40,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:03:40,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:03:40,278 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:40,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1008225408, now seen corresponding path program 1 times [2020-10-28 00:03:40,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:40,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75613182] [2020-10-28 00:03:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:40,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:40,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:40,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:40,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 00:03:40,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:03:40,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-28 00:03:40,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:03:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:03:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:03:40,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:40,845 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:03:40,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:40,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:40,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:40,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:40,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:40,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:03:40,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:40,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:40,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:40,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:40,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:03:40,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75613182] [2020-10-28 00:03:40,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:40,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:03:40,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36420232] [2020-10-28 00:03:40,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:03:40,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:40,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:03:40,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:03:40,876 INFO L87 Difference]: Start difference. First operand 1587 states and 2338 transitions. Second operand 4 states. [2020-10-28 00:03:41,058 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:03:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:41,659 INFO L93 Difference]: Finished difference Result 3823 states and 5644 transitions. [2020-10-28 00:03:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:03:41,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-28 00:03:41,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:41,672 INFO L225 Difference]: With dead ends: 3823 [2020-10-28 00:03:41,672 INFO L226 Difference]: Without dead ends: 2260 [2020-10-28 00:03:41,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:03:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2020-10-28 00:03:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2257. [2020-10-28 00:03:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-10-28 00:03:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3308 transitions. [2020-10-28 00:03:41,892 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3308 transitions. Word has length 49 [2020-10-28 00:03:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:41,893 INFO L481 AbstractCegarLoop]: Abstraction has 2257 states and 3308 transitions. [2020-10-28 00:03:41,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:03:41,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3308 transitions. [2020-10-28 00:03:41,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 00:03:41,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:41,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:03:41,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:03:41,896 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:41,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:41,897 INFO L82 PathProgramCache]: Analyzing trace with hash 384979062, now seen corresponding path program 1 times [2020-10-28 00:03:41,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:41,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159219837] [2020-10-28 00:03:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:41,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:41,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:42,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:42,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 00:03:42,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:03:42,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-28 00:03:42,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:42,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:03:42,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:03:42,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 00:03:42,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:42,858 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:03:42,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:42,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:42,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:42,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:42,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:42,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:03:42,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:42,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:42,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:42,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:42,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:03:42,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159219837] [2020-10-28 00:03:42,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:03:42,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:03:42,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576337281] [2020-10-28 00:03:42,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:03:42,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:42,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:03:42,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:03:42,916 INFO L87 Difference]: Start difference. First operand 2257 states and 3308 transitions. Second operand 5 states. [2020-10-28 00:03:43,133 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:03:43,738 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:03:44,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:44,051 INFO L93 Difference]: Finished difference Result 5274 states and 7762 transitions. [2020-10-28 00:03:44,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:03:44,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-28 00:03:44,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:44,071 INFO L225 Difference]: With dead ends: 5274 [2020-10-28 00:03:44,072 INFO L226 Difference]: Without dead ends: 3711 [2020-10-28 00:03:44,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:03:44,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2020-10-28 00:03:44,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 3705. [2020-10-28 00:03:44,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3705 states. [2020-10-28 00:03:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 5396 transitions. [2020-10-28 00:03:44,408 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 5396 transitions. Word has length 66 [2020-10-28 00:03:44,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:44,409 INFO L481 AbstractCegarLoop]: Abstraction has 3705 states and 5396 transitions. [2020-10-28 00:03:44,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:03:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 5396 transitions. [2020-10-28 00:03:44,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:03:44,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:44,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:03:44,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:03:44,413 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:44,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:44,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1298422571, now seen corresponding path program 1 times [2020-10-28 00:03:44,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:44,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922088514] [2020-10-28 00:03:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:44,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:44,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:44,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:44,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:44,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:45,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:46,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:49,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:49,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:03:49,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:03:49,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:03:49,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:49,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:03:49,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:03:49,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:03:49,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:49,631 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:03:49,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:49,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:49,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:49,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:49,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:49,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:03:49,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:49,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:49,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:49,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:49,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:03:49,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922088514] [2020-10-28 00:03:49,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:49,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:03:49,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073373824] [2020-10-28 00:03:49,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:03:49,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:49,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:03:49,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:03:49,671 INFO L87 Difference]: Start difference. First operand 3705 states and 5396 transitions. Second operand 4 states. [2020-10-28 00:03:49,844 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:03:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:50,646 INFO L93 Difference]: Finished difference Result 8162 states and 11881 transitions. [2020-10-28 00:03:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:03:50,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 00:03:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:50,675 INFO L225 Difference]: With dead ends: 8162 [2020-10-28 00:03:50,675 INFO L226 Difference]: Without dead ends: 5487 [2020-10-28 00:03:50,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:03:50,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5487 states. [2020-10-28 00:03:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5487 to 5116. [2020-10-28 00:03:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5116 states. [2020-10-28 00:03:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5116 states to 5116 states and 7357 transitions. [2020-10-28 00:03:51,120 INFO L78 Accepts]: Start accepts. Automaton has 5116 states and 7357 transitions. Word has length 67 [2020-10-28 00:03:51,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:51,120 INFO L481 AbstractCegarLoop]: Abstraction has 5116 states and 7357 transitions. [2020-10-28 00:03:51,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:03:51,120 INFO L276 IsEmpty]: Start isEmpty. Operand 5116 states and 7357 transitions. [2020-10-28 00:03:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:03:51,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:51,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:03:51,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:03:51,124 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:51,124 INFO L82 PathProgramCache]: Analyzing trace with hash 789535852, now seen corresponding path program 1 times [2020-10-28 00:03:51,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:51,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280802864] [2020-10-28 00:03:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:51,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:51,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:51,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:51,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:51,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:52,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:56,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:56,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:03:56,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:03:56,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:03:56,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:56,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:03:56,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:03:56,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:03:56,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:03:56,436 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:03:56,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:56,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:56,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:56,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:56,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:56,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:03:56,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:56,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:56,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:56,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:56,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:03:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:03:56,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280802864] [2020-10-28 00:03:56,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:56,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:03:56,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884556556] [2020-10-28 00:03:56,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:03:56,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:56,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:03:56,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:03:56,489 INFO L87 Difference]: Start difference. First operand 5116 states and 7357 transitions. Second operand 4 states. [2020-10-28 00:03:56,757 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:03:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:57,689 INFO L93 Difference]: Finished difference Result 8622 states and 12313 transitions. [2020-10-28 00:03:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:03:57,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 00:03:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:57,725 INFO L225 Difference]: With dead ends: 8622 [2020-10-28 00:03:57,725 INFO L226 Difference]: Without dead ends: 5437 [2020-10-28 00:03:57,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:03:57,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2020-10-28 00:03:58,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 5261. [2020-10-28 00:03:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5261 states. [2020-10-28 00:03:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7396 transitions. [2020-10-28 00:03:58,243 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7396 transitions. Word has length 67 [2020-10-28 00:03:58,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:58,244 INFO L481 AbstractCegarLoop]: Abstraction has 5261 states and 7396 transitions. [2020-10-28 00:03:58,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:03:58,244 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7396 transitions. [2020-10-28 00:03:58,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:03:58,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:58,247 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:03:58,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:03:58,248 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:58,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:58,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1583880788, now seen corresponding path program 1 times [2020-10-28 00:03:58,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:58,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771313959] [2020-10-28 00:03:58,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:58,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:58,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:58,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:58,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:58,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:01,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:01,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:04:01,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:04:01,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3565 [2020-10-28 00:04:01,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:04:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:04:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:04:01,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:02,063 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:02,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:02,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:02,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:02,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:02,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:02,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:04:02,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:02,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:02,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771313959] [2020-10-28 00:04:02,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:04:02,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:04:02,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100372669] [2020-10-28 00:04:02,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:04:02,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:02,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:04:02,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:04:02,095 INFO L87 Difference]: Start difference. First operand 5261 states and 7396 transitions. Second operand 6 states. [2020-10-28 00:04:02,866 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:04:03,084 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:04:03,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:03,544 INFO L93 Difference]: Finished difference Result 13160 states and 18265 transitions. [2020-10-28 00:04:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:04:03,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 00:04:03,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:03,630 INFO L225 Difference]: With dead ends: 13160 [2020-10-28 00:04:03,630 INFO L226 Difference]: Without dead ends: 7949 [2020-10-28 00:04:03,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:04:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7949 states. [2020-10-28 00:04:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7949 to 5405. [2020-10-28 00:04:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5405 states. [2020-10-28 00:04:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 7402 transitions. [2020-10-28 00:04:04,298 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 7402 transitions. Word has length 67 [2020-10-28 00:04:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:04,298 INFO L481 AbstractCegarLoop]: Abstraction has 5405 states and 7402 transitions. [2020-10-28 00:04:04,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:04:04,299 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 7402 transitions. [2020-10-28 00:04:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:04:04,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:04,307 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:04,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:04:04,307 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:04,308 INFO L82 PathProgramCache]: Analyzing trace with hash -333576509, now seen corresponding path program 1 times [2020-10-28 00:04:04,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:04,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402597391] [2020-10-28 00:04:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:04,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:04,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:04,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:04,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:04,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:07,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:07,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:04:07,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:04:07,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2669 [2020-10-28 00:04:07,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:07,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:04:07,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:04:07,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:04:07,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 00:04:07,208 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:07,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:07,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:07,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:07,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:07,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:07,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:04:07,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:07,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:07,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:07,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:07,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:07,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402597391] [2020-10-28 00:04:07,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:04:07,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:04:07,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732378711] [2020-10-28 00:04:07,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:04:07,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:07,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:04:07,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:04:07,248 INFO L87 Difference]: Start difference. First operand 5405 states and 7402 transitions. Second operand 6 states. [2020-10-28 00:04:08,253 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:04:08,463 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:04:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:09,293 INFO L93 Difference]: Finished difference Result 19947 states and 27196 transitions. [2020-10-28 00:04:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:04:09,296 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 00:04:09,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:09,330 INFO L225 Difference]: With dead ends: 19947 [2020-10-28 00:04:09,330 INFO L226 Difference]: Without dead ends: 14574 [2020-10-28 00:04:09,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:04:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14574 states. [2020-10-28 00:04:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14574 to 7366. [2020-10-28 00:04:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7366 states. [2020-10-28 00:04:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7366 states to 7366 states and 9840 transitions. [2020-10-28 00:04:10,148 INFO L78 Accepts]: Start accepts. Automaton has 7366 states and 9840 transitions. Word has length 67 [2020-10-28 00:04:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:10,148 INFO L481 AbstractCegarLoop]: Abstraction has 7366 states and 9840 transitions. [2020-10-28 00:04:10,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:04:10,149 INFO L276 IsEmpty]: Start isEmpty. Operand 7366 states and 9840 transitions. [2020-10-28 00:04:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:04:10,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:10,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:10,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:04:10,153 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:10,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:10,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1946086804, now seen corresponding path program 1 times [2020-10-28 00:04:10,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:10,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591111839] [2020-10-28 00:04:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:10,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:10,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:10,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:10,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:10,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:12,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:12,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:04:12,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:04:12,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2110 [2020-10-28 00:04:12,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:12,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:04:12,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:04:12,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:04:12,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:12,535 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:12,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:12,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:12,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:12,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:12,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:12,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:04:12,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:12,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:12,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:12,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:12,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:04:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:12,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591111839] [2020-10-28 00:04:12,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:04:12,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:04:12,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174395111] [2020-10-28 00:04:12,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:04:12,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:12,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:04:12,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:04:12,583 INFO L87 Difference]: Start difference. First operand 7366 states and 9840 transitions. Second operand 6 states. [2020-10-28 00:04:13,633 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:04:13,889 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:04:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:14,764 INFO L93 Difference]: Finished difference Result 22732 states and 30131 transitions. [2020-10-28 00:04:14,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:04:14,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 00:04:14,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:14,802 INFO L225 Difference]: With dead ends: 22732 [2020-10-28 00:04:14,802 INFO L226 Difference]: Without dead ends: 15421 [2020-10-28 00:04:14,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:04:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15421 states. [2020-10-28 00:04:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15421 to 9108. [2020-10-28 00:04:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9108 states. [2020-10-28 00:04:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9108 states to 9108 states and 12010 transitions. [2020-10-28 00:04:15,761 INFO L78 Accepts]: Start accepts. Automaton has 9108 states and 12010 transitions. Word has length 67 [2020-10-28 00:04:15,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:15,761 INFO L481 AbstractCegarLoop]: Abstraction has 9108 states and 12010 transitions. [2020-10-28 00:04:15,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:04:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 9108 states and 12010 transitions. [2020-10-28 00:04:15,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:04:15,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:15,773 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:15,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:04:15,774 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:15,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:15,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1151741868, now seen corresponding path program 1 times [2020-10-28 00:04:15,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:15,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482119466] [2020-10-28 00:04:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:15,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:15,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:15,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:15,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:16,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:16,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:16,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:20,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:20,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:20,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:04:20,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:04:20,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:04:20,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:20,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:04:20,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:04:20,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 00:04:20,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:20,986 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:20,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:20,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:20,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:21,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:21,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:21,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:04:21,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:21,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:21,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:21,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:21,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:21,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482119466] [2020-10-28 00:04:21,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:21,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:04:21,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749646407] [2020-10-28 00:04:21,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:04:21,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:21,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:04:21,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:04:21,017 INFO L87 Difference]: Start difference. First operand 9108 states and 12010 transitions. Second operand 4 states. [2020-10-28 00:04:21,254 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:04:22,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:22,459 INFO L93 Difference]: Finished difference Result 19996 states and 26422 transitions. [2020-10-28 00:04:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:04:22,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 00:04:22,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:22,490 INFO L225 Difference]: With dead ends: 19996 [2020-10-28 00:04:22,491 INFO L226 Difference]: Without dead ends: 12993 [2020-10-28 00:04:22,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:22,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12993 states. [2020-10-28 00:04:23,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12993 to 12947. [2020-10-28 00:04:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12947 states. [2020-10-28 00:04:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12947 states to 12947 states and 16918 transitions. [2020-10-28 00:04:23,568 INFO L78 Accepts]: Start accepts. Automaton has 12947 states and 16918 transitions. Word has length 67 [2020-10-28 00:04:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:23,569 INFO L481 AbstractCegarLoop]: Abstraction has 12947 states and 16918 transitions. [2020-10-28 00:04:23,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:04:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 12947 states and 16918 transitions. [2020-10-28 00:04:23,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:04:23,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:23,575 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:23,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:04:23,576 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:23,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:23,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1485833580, now seen corresponding path program 1 times [2020-10-28 00:04:23,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:23,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563175978] [2020-10-28 00:04:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:23,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:23,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:23,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:23,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:23,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:23,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:23,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:25,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:25,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:25,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:25,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:26,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:26,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:28,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:28,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:04:28,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:04:28,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:04:28,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:04:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:04:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:04:28,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:29,018 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:29,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:29,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:29,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:29,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:29,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:29,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:04:29,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:29,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:29,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:29,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:29,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:29,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563175978] [2020-10-28 00:04:29,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:04:29,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:04:29,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781742557] [2020-10-28 00:04:29,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:04:29,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:29,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:04:29,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:04:29,064 INFO L87 Difference]: Start difference. First operand 12947 states and 16918 transitions. Second operand 11 states. [2020-10-28 00:04:29,291 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:32,391 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:04:32,882 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:04:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:37,602 INFO L93 Difference]: Finished difference Result 66282 states and 85276 transitions. [2020-10-28 00:04:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-28 00:04:37,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-10-28 00:04:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:37,700 INFO L225 Difference]: With dead ends: 66282 [2020-10-28 00:04:37,700 INFO L226 Difference]: Without dead ends: 53366 [2020-10-28 00:04:37,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=721, Invalid=3061, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 00:04:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53366 states. [2020-10-28 00:04:39,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53366 to 15707. [2020-10-28 00:04:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15707 states. [2020-10-28 00:04:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15707 states to 15707 states and 20569 transitions. [2020-10-28 00:04:39,968 INFO L78 Accepts]: Start accepts. Automaton has 15707 states and 20569 transitions. Word has length 69 [2020-10-28 00:04:39,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:39,969 INFO L481 AbstractCegarLoop]: Abstraction has 15707 states and 20569 transitions. [2020-10-28 00:04:39,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:04:39,969 INFO L276 IsEmpty]: Start isEmpty. Operand 15707 states and 20569 transitions. [2020-10-28 00:04:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:04:39,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:39,975 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:39,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:04:39,976 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:39,976 INFO L82 PathProgramCache]: Analyzing trace with hash 667668221, now seen corresponding path program 1 times [2020-10-28 00:04:39,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:39,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38195731] [2020-10-28 00:04:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:40,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:40,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:40,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:40,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:40,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:40,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:41,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:41,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:42,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:42,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:45,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:45,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:04:45,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:04:45,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:04:45,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:45,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:04:45,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:04:45,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:04:45,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:45,288 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 15 [2020-10-28 00:04:45,523 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:45,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:45,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:45,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:45,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:45,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:45,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:04:45,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:45,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:45,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:45,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38195731] [2020-10-28 00:04:45,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:04:45,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:04:45,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608025644] [2020-10-28 00:04:45,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:04:45,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:45,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:04:45,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:04:45,557 INFO L87 Difference]: Start difference. First operand 15707 states and 20569 transitions. Second operand 11 states. [2020-10-28 00:04:45,827 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:48,433 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:04:48,850 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:04:51,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:51,399 INFO L93 Difference]: Finished difference Result 35678 states and 46364 transitions. [2020-10-28 00:04:51,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 00:04:51,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-10-28 00:04:51,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:51,435 INFO L225 Difference]: With dead ends: 35678 [2020-10-28 00:04:51,435 INFO L226 Difference]: Without dead ends: 29957 [2020-10-28 00:04:51,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=287, Invalid=1195, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 00:04:51,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29957 states. [2020-10-28 00:04:53,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29957 to 16483. [2020-10-28 00:04:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16483 states. [2020-10-28 00:04:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16483 states to 16483 states and 21605 transitions. [2020-10-28 00:04:53,346 INFO L78 Accepts]: Start accepts. Automaton has 16483 states and 21605 transitions. Word has length 69 [2020-10-28 00:04:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:53,346 INFO L481 AbstractCegarLoop]: Abstraction has 16483 states and 21605 transitions. [2020-10-28 00:04:53,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:04:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 16483 states and 21605 transitions. [2020-10-28 00:04:53,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:04:53,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:53,353 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:53,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:04:53,354 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:53,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:53,354 INFO L82 PathProgramCache]: Analyzing trace with hash -729287710, now seen corresponding path program 1 times [2020-10-28 00:04:53,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:53,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111699889] [2020-10-28 00:04:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:53,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:53,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:53,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:53,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:53,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:53,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:55,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:58,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:58,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:04:58,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:04:58,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:04:58,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:58,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:04:58,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:04:58,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 00:04:58,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:58,582 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:58,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:58,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:58,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:58,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:58,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:58,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:04:58,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:58,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:58,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:04:58,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111699889] [2020-10-28 00:04:58,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:04:58,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:04:58,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850052868] [2020-10-28 00:04:58,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:04:58,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:58,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:04:58,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:04:58,623 INFO L87 Difference]: Start difference. First operand 16483 states and 21605 transitions. Second operand 6 states. [2020-10-28 00:04:58,832 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:04:59,748 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:05:01,898 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 00:05:02,087 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:05:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:03,244 INFO L93 Difference]: Finished difference Result 44629 states and 59339 transitions. [2020-10-28 00:05:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:05:03,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 00:05:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:03,288 INFO L225 Difference]: With dead ends: 44629 [2020-10-28 00:05:03,288 INFO L226 Difference]: Without dead ends: 36483 [2020-10-28 00:05:03,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:05:03,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36483 states. [2020-10-28 00:05:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36483 to 24823. [2020-10-28 00:05:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24823 states. [2020-10-28 00:05:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24823 states to 24823 states and 32497 transitions. [2020-10-28 00:05:05,946 INFO L78 Accepts]: Start accepts. Automaton has 24823 states and 32497 transitions. Word has length 69 [2020-10-28 00:05:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:05,946 INFO L481 AbstractCegarLoop]: Abstraction has 24823 states and 32497 transitions. [2020-10-28 00:05:05,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:05:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 24823 states and 32497 transitions. [2020-10-28 00:05:05,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:05:05,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:05,953 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:05:05,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:05:05,953 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:05,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1821705519, now seen corresponding path program 1 times [2020-10-28 00:05:05,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:05,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569792742] [2020-10-28 00:05:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:05,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:06,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:06,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:06,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:06,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:06,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:07,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:10,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:10,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:05:10,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:05:10,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:05:10,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:10,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:05:10,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:05:10,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:05:10,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:11,185 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:05:11,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:11,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:11,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:11,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:11,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:11,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:05:11,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:11,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:11,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:11,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:11,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:11,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569792742] [2020-10-28 00:05:11,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:05:11,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:05:11,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020475436] [2020-10-28 00:05:11,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:05:11,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:11,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:05:11,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:05:11,215 INFO L87 Difference]: Start difference. First operand 24823 states and 32497 transitions. Second operand 6 states. [2020-10-28 00:05:11,428 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:05:12,898 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:05:13,227 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:05:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:22,574 INFO L93 Difference]: Finished difference Result 123294 states and 161146 transitions. [2020-10-28 00:05:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:05:22,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 00:05:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:22,928 INFO L225 Difference]: With dead ends: 123294 [2020-10-28 00:05:22,928 INFO L226 Difference]: Without dead ends: 98562 [2020-10-28 00:05:22,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:05:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98562 states. [2020-10-28 00:05:32,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98562 to 82269. [2020-10-28 00:05:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82269 states. [2020-10-28 00:05:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82269 states to 82269 states and 107424 transitions. [2020-10-28 00:05:32,239 INFO L78 Accepts]: Start accepts. Automaton has 82269 states and 107424 transitions. Word has length 69 [2020-10-28 00:05:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:32,240 INFO L481 AbstractCegarLoop]: Abstraction has 82269 states and 107424 transitions. [2020-10-28 00:05:32,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:05:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 82269 states and 107424 transitions. [2020-10-28 00:05:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:05:32,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:32,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:05:32,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:05:32,250 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:32,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:32,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1902845196, now seen corresponding path program 1 times [2020-10-28 00:05:32,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:32,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285001142] [2020-10-28 00:05:32,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:32,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:32,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:32,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:32,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:33,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:33,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:33,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:34,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:34,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:34,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:34,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:37,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:37,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:05:37,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:05:37,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:05:37,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:37,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 00:05:37,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:05:37,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:05:37,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:37,783 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:05:37,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:37,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:37,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:37,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:37,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:37,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:05:37,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:37,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:37,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:37,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:37,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:37,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285001142] [2020-10-28 00:05:37,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:05:37,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 00:05:37,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170739157] [2020-10-28 00:05:37,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 00:05:37,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:37,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 00:05:37,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:05:37,821 INFO L87 Difference]: Start difference. First operand 82269 states and 107424 transitions. Second operand 12 states. [2020-10-28 00:05:38,193 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:05:42,059 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:05:42,611 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:05:42,889 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:05:43,537 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:06:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:06,882 INFO L93 Difference]: Finished difference Result 225097 states and 287315 transitions. [2020-10-28 00:06:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-28 00:06:06,882 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-28 00:06:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:07,334 INFO L225 Difference]: With dead ends: 225097 [2020-10-28 00:06:07,334 INFO L226 Difference]: Without dead ends: 178742 [2020-10-28 00:06:07,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=512, Invalid=2794, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 00:06:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178742 states. [2020-10-28 00:06:18,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178742 to 82269. [2020-10-28 00:06:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82269 states. [2020-10-28 00:06:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82269 states to 82269 states and 107424 transitions. [2020-10-28 00:06:18,390 INFO L78 Accepts]: Start accepts. Automaton has 82269 states and 107424 transitions. Word has length 69 [2020-10-28 00:06:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:18,391 INFO L481 AbstractCegarLoop]: Abstraction has 82269 states and 107424 transitions. [2020-10-28 00:06:18,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 00:06:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 82269 states and 107424 transitions. [2020-10-28 00:06:18,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:06:18,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:18,399 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:06:18,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:06:18,399 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:18,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:18,399 INFO L82 PathProgramCache]: Analyzing trace with hash -622547069, now seen corresponding path program 1 times [2020-10-28 00:06:18,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:18,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040684769] [2020-10-28 00:06:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:18,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:18,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:18,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:18,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:19,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:19,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:19,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:19,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:19,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:19,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:19,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:19,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:19,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:23,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:23,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:06:23,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:06:23,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:06:23,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:23,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:06:23,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:06:23,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:06:23,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:23,799 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:06:23,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:23,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:23,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:23,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:23,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:23,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:06:23,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:23,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:23,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:23,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:23,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:23,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040684769] [2020-10-28 00:06:23,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:06:23,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:06:23,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713865717] [2020-10-28 00:06:23,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:06:23,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:23,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:06:23,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:06:23,824 INFO L87 Difference]: Start difference. First operand 82269 states and 107424 transitions. Second operand 11 states. [2020-10-28 00:06:24,099 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:06:26,718 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:06:27,185 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:06:30,637 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:06:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:53,371 INFO L93 Difference]: Finished difference Result 251618 states and 322027 transitions. [2020-10-28 00:06:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 00:06:53,372 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-10-28 00:06:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:53,917 INFO L225 Difference]: With dead ends: 251618 [2020-10-28 00:06:53,918 INFO L226 Difference]: Without dead ends: 209859 [2020-10-28 00:06:53,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=411, Invalid=1569, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 00:06:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209859 states.