/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:42:06,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:42:06,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:42:06,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:42:06,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:42:06,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:42:06,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:42:06,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:42:06,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:42:06,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:42:06,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:42:06,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:42:06,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:42:06,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:42:06,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:42:06,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:42:06,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:42:06,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:42:06,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:42:06,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:42:06,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:42:06,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:42:06,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:42:06,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:42:06,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:42:06,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:42:06,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:42:06,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:42:06,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:42:06,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:42:06,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:42:06,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:42:06,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:42:06,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:42:06,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:42:06,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:42:06,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:42:06,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:42:06,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:42:06,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:42:06,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:42:06,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:42:06,272 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:42:06,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:42:06,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:42:06,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:42:06,274 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:42:06,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:42:06,275 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:42:06,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:42:06,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:42:06,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:42:06,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:42:06,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:42:06,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:42:06,276 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:42:06,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:42:06,277 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:42:06,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:42:06,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:42:06,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:42:06,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:42:06,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:42:06,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:42:06,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:42:06,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:42:06,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:42:06,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:42:06,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:42:06,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:42:06,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:42:06,280 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:42:06,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:42:06,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:42:06,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:42:06,740 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:42:06,741 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:42:06,742 INFO L432 ainManager$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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-29 13:42:06,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d907f5640/8e90e3d7bd434653bfe70ccdcb351118/FLAG5c3c4267a [2020-10-29 13:42:07,527 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:42:07,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-29 13:42:07,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d907f5640/8e90e3d7bd434653bfe70ccdcb351118/FLAG5c3c4267a [2020-10-29 13:42:07,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d907f5640/8e90e3d7bd434653bfe70ccdcb351118 [2020-10-29 13:42:07,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:42:07,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:42:07,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:42:07,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:42:07,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:42:07,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:42:07" (1/1) ... [2020-10-29 13:42:07,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd6ea22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:07, skipping insertion in model container [2020-10-29 13:42:07,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:42:07" (1/1) ... [2020-10-29 13:42:07,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:42:07,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:42:08,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:42:08,220 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:42:08,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:42:08,385 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:42:08,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:08 WrapperNode [2020-10-29 13:42:08,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:42:08,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:42:08,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:42:08,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:42:08,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:08" (1/1) ... [2020-10-29 13:42:08,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:08" (1/1) ... [2020-10-29 13:42:08,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:08" (1/1) ... [2020-10-29 13:42:08,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:08" (1/1) ... [2020-10-29 13:42:08,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:08" (1/1) ... [2020-10-29 13:42:08,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:08" (1/1) ... [2020-10-29 13:42:08,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:08" (1/1) ... [2020-10-29 13:42:08,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:42:08,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:42:08,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:42:08,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:42:08,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:42:08,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:42:08,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:42:08,563 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:42:08,564 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:42:08,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:42:08,565 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:42:08,565 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:42:08,565 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:42:08,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:42:08,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:42:08,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:42:08,566 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:42:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:42:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:42:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:42:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:42:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:42:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:42:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:42:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:42:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:42:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:42:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:42:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:42:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:42:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:42:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:42:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:42:09,410 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:42:09,410 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:42:09,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:42:09 BoogieIcfgContainer [2020-10-29 13:42:09,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:42:09,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:42:09,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:42:09,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:42:09,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:42:07" (1/3) ... [2020-10-29 13:42:09,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c933b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:42:09, skipping insertion in model container [2020-10-29 13:42:09,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:08" (2/3) ... [2020-10-29 13:42:09,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c933b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:42:09, skipping insertion in model container [2020-10-29 13:42:09,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:42:09" (3/3) ... [2020-10-29 13:42:09,425 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-29 13:42:09,440 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:42:09,446 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:42:09,461 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:42:09,504 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:42:09,504 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:42:09,504 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:42:09,504 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:42:09,505 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:42:09,505 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:42:09,505 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:42:09,505 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:42:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states. [2020-10-29 13:42:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:42:09,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:09,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:09,551 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:09,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2088021378, now seen corresponding path program 1 times [2020-10-29 13:42:09,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:09,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064786277] [2020-10-29 13:42:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:09,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:10,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:10,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:10,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:10,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:14,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:14,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:42:14,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:42:14,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:42:14,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:14,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:14,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:42:14,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:42:14,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:42:14,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:42:15,272 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:42:15,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:15,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:15,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:15,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:15,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:15,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:42:15,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:15,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:15,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:15,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:15,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:15,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:42:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:15,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064786277] [2020-10-29 13:42:15,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:15,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:42:15,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580882757] [2020-10-29 13:42:15,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:42:15,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:15,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:42:15,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:42:15,380 INFO L87 Difference]: Start difference. First operand 119 states. Second operand 7 states. [2020-10-29 13:42:15,747 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:42:16,954 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:42:17,209 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:42:17,438 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:42:17,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:17,485 INFO L93 Difference]: Finished difference Result 544 states and 862 transitions. [2020-10-29 13:42:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:42:17,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-29 13:42:17,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:17,504 INFO L225 Difference]: With dead ends: 544 [2020-10-29 13:42:17,505 INFO L226 Difference]: Without dead ends: 436 [2020-10-29 13:42:17,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:42:17,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-29 13:42:17,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 190. [2020-10-29 13:42:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-29 13:42:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 283 transitions. [2020-10-29 13:42:17,585 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 283 transitions. Word has length 53 [2020-10-29 13:42:17,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:17,586 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 283 transitions. [2020-10-29 13:42:17,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:42:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 283 transitions. [2020-10-29 13:42:17,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:42:17,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:17,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:17,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:42:17,590 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:17,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:17,591 INFO L82 PathProgramCache]: Analyzing trace with hash -270600982, now seen corresponding path program 1 times [2020-10-29 13:42:17,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:17,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548381813] [2020-10-29 13:42:17,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:17,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:17,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:17,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:17,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:18,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:19,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:19,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:42:19,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:42:19,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2069 [2020-10-29 13:42:19,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:19,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:42:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 13:42:19,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:42:19,921 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:42:19,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:19,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:19,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:19,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:19,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:19,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:42:19,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:19,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:19,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:19,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:19,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:19,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:42:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:19,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548381813] [2020-10-29 13:42:19,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:19,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:42:19,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657604726] [2020-10-29 13:42:19,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:42:19,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:19,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:42:19,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:42:19,966 INFO L87 Difference]: Start difference. First operand 190 states and 283 transitions. Second operand 4 states. [2020-10-29 13:42:20,210 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:42:20,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:20,744 INFO L93 Difference]: Finished difference Result 476 states and 735 transitions. [2020-10-29 13:42:20,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:42:20,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-29 13:42:20,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:20,748 INFO L225 Difference]: With dead ends: 476 [2020-10-29 13:42:20,748 INFO L226 Difference]: Without dead ends: 317 [2020-10-29 13:42:20,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:42:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-29 13:42:20,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 314. [2020-10-29 13:42:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-29 13:42:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 479 transitions. [2020-10-29 13:42:20,785 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 479 transitions. Word has length 54 [2020-10-29 13:42:20,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:20,785 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 479 transitions. [2020-10-29 13:42:20,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:42:20,785 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 479 transitions. [2020-10-29 13:42:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:42:20,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:20,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:20,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:42:20,789 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:20,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:20,789 INFO L82 PathProgramCache]: Analyzing trace with hash 284147164, now seen corresponding path program 1 times [2020-10-29 13:42:20,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:20,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348583516] [2020-10-29 13:42:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:20,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:20,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:20,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:21,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:21,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:21,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:42:21,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:42:21,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-10-29 13:42:21,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:21,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:21,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:21,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 13:42:21,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 13:42:21,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:42:22,032 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:42:22,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:22,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:22,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:22,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:22,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:22,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:42:22,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:22,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:22,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:22,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:22,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:22,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:42:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:22,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348583516] [2020-10-29 13:42:22,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:22,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:42:22,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265739144] [2020-10-29 13:42:22,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:42:22,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:22,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:42:22,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:42:22,080 INFO L87 Difference]: Start difference. First operand 314 states and 479 transitions. Second operand 4 states. [2020-10-29 13:42:22,297 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:42:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:22,946 INFO L93 Difference]: Finished difference Result 816 states and 1271 transitions. [2020-10-29 13:42:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:42:22,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-29 13:42:22,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:22,953 INFO L225 Difference]: With dead ends: 816 [2020-10-29 13:42:22,953 INFO L226 Difference]: Without dead ends: 533 [2020-10-29 13:42:22,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:42:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-10-29 13:42:23,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 530. [2020-10-29 13:42:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2020-10-29 13:42:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 817 transitions. [2020-10-29 13:42:23,020 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 817 transitions. Word has length 55 [2020-10-29 13:42:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:23,022 INFO L481 AbstractCegarLoop]: Abstraction has 530 states and 817 transitions. [2020-10-29 13:42:23,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:42:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 817 transitions. [2020-10-29 13:42:23,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:42:23,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:23,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:23,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:42:23,034 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:23,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2025658430, now seen corresponding path program 1 times [2020-10-29 13:42:23,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:23,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409832376] [2020-10-29 13:42:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:23,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:23,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:23,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:23,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:23,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:42:23,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:42:23,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-29 13:42:23,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:23,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:23,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:23,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:42:23,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 13:42:23,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:23,827 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:42:23,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:23,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:23,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:23,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:23,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:23,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:42:23,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:23,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:23,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:23,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:23,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:23,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:42:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:23,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409832376] [2020-10-29 13:42:23,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:23,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:42:23,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852657069] [2020-10-29 13:42:23,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:42:23,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:23,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:42:23,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:42:23,875 INFO L87 Difference]: Start difference. First operand 530 states and 817 transitions. Second operand 4 states. [2020-10-29 13:42:24,075 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:42:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:24,785 INFO L93 Difference]: Finished difference Result 1400 states and 2181 transitions. [2020-10-29 13:42:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:42:24,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-29 13:42:24,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:24,792 INFO L225 Difference]: With dead ends: 1400 [2020-10-29 13:42:24,792 INFO L226 Difference]: Without dead ends: 901 [2020-10-29 13:42:24,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:42:24,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2020-10-29 13:42:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 898. [2020-10-29 13:42:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-10-29 13:42:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1385 transitions. [2020-10-29 13:42:24,859 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1385 transitions. Word has length 56 [2020-10-29 13:42:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:24,859 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1385 transitions. [2020-10-29 13:42:24,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:42:24,860 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1385 transitions. [2020-10-29 13:42:24,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:42:24,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:24,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:24,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:42:24,861 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:24,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:24,862 INFO L82 PathProgramCache]: Analyzing trace with hash -727340697, now seen corresponding path program 1 times [2020-10-29 13:42:24,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:24,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606191657] [2020-10-29 13:42:24,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:24,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:25,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:25,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:25,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:42:25,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:42:25,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-29 13:42:25,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:25,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:25,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:25,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 13:42:25,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 13:42:25,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:25,386 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:42:25,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:25,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:25,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:25,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:25,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:25,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:42:25,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:25,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:25,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:25,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:25,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:25,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:25,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606191657] [2020-10-29 13:42:25,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:25,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:42:25,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664778403] [2020-10-29 13:42:25,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:42:25,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:25,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:42:25,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:42:25,426 INFO L87 Difference]: Start difference. First operand 898 states and 1385 transitions. Second operand 4 states. [2020-10-29 13:42:25,638 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:42:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:26,286 INFO L93 Difference]: Finished difference Result 2376 states and 3677 transitions. [2020-10-29 13:42:26,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:42:26,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-29 13:42:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:26,296 INFO L225 Difference]: With dead ends: 2376 [2020-10-29 13:42:26,296 INFO L226 Difference]: Without dead ends: 1509 [2020-10-29 13:42:26,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:42:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2020-10-29 13:42:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1506. [2020-10-29 13:42:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1506 states. [2020-10-29 13:42:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2305 transitions. [2020-10-29 13:42:26,395 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2305 transitions. Word has length 57 [2020-10-29 13:42:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:26,395 INFO L481 AbstractCegarLoop]: Abstraction has 1506 states and 2305 transitions. [2020-10-29 13:42:26,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:42:26,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2305 transitions. [2020-10-29 13:42:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:42:26,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:26,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:26,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:42:26,397 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:26,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:26,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1653608408, now seen corresponding path program 1 times [2020-10-29 13:42:26,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:26,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614072859] [2020-10-29 13:42:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:26,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:26,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:26,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:26,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:42:26,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:42:26,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-29 13:42:26,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:26,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:26,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:42:26,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:42:26,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:42:26,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:27,130 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:42:27,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:27,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:27,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:27,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:27,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:27,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:42:27,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:27,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:27,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:27,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:27,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:27,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:27,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614072859] [2020-10-29 13:42:27,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:27,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:42:27,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991144337] [2020-10-29 13:42:27,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:42:27,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:27,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:42:27,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:42:27,191 INFO L87 Difference]: Start difference. First operand 1506 states and 2305 transitions. Second operand 7 states. [2020-10-29 13:42:27,815 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:42:27,996 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:42:28,203 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:42:28,388 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:42:29,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:29,405 INFO L93 Difference]: Finished difference Result 6510 states and 9929 transitions. [2020-10-29 13:42:29,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:42:29,406 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-29 13:42:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:29,435 INFO L225 Difference]: With dead ends: 6510 [2020-10-29 13:42:29,435 INFO L226 Difference]: Without dead ends: 5035 [2020-10-29 13:42:29,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:42:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5035 states. [2020-10-29 13:42:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5035 to 5026. [2020-10-29 13:42:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5026 states. [2020-10-29 13:42:29,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5026 states to 5026 states and 7617 transitions. [2020-10-29 13:42:29,902 INFO L78 Accepts]: Start accepts. Automaton has 5026 states and 7617 transitions. Word has length 58 [2020-10-29 13:42:29,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:29,902 INFO L481 AbstractCegarLoop]: Abstraction has 5026 states and 7617 transitions. [2020-10-29 13:42:29,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:42:29,902 INFO L276 IsEmpty]: Start isEmpty. Operand 5026 states and 7617 transitions. [2020-10-29 13:42:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:42:29,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:29,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:29,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:42:29,904 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash -536721455, now seen corresponding path program 1 times [2020-10-29 13:42:29,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:29,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116034785] [2020-10-29 13:42:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:29,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:30,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:30,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:30,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:42:30,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:42:30,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-29 13:42:30,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:30,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:30,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:42:30,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:42:30,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:42:30,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:30,601 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:42:30,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:30,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:30,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:30,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:30,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:30,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:42:30,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:30,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:30,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:30,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:30,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:42:30,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:30,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116034785] [2020-10-29 13:42:30,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:30,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:42:30,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276053015] [2020-10-29 13:42:30,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:42:30,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:30,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:42:30,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:42:30,662 INFO L87 Difference]: Start difference. First operand 5026 states and 7617 transitions. Second operand 6 states. [2020-10-29 13:42:30,896 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:42:31,768 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:42:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:32,323 INFO L93 Difference]: Finished difference Result 14904 states and 22565 transitions. [2020-10-29 13:42:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:42:32,324 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-29 13:42:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:32,374 INFO L225 Difference]: With dead ends: 14904 [2020-10-29 13:42:32,375 INFO L226 Difference]: Without dead ends: 9909 [2020-10-29 13:42:32,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:42:32,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9909 states. [2020-10-29 13:42:33,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9909 to 9906. [2020-10-29 13:42:33,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9906 states. [2020-10-29 13:42:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9906 states to 9906 states and 14865 transitions. [2020-10-29 13:42:33,242 INFO L78 Accepts]: Start accepts. Automaton has 9906 states and 14865 transitions. Word has length 60 [2020-10-29 13:42:33,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:33,242 INFO L481 AbstractCegarLoop]: Abstraction has 9906 states and 14865 transitions. [2020-10-29 13:42:33,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:42:33,242 INFO L276 IsEmpty]: Start isEmpty. Operand 9906 states and 14865 transitions. [2020-10-29 13:42:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:42:33,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:33,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:33,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:42:33,244 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:33,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1502173386, now seen corresponding path program 1 times [2020-10-29 13:42:33,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:33,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959946944] [2020-10-29 13:42:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:33,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:33,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:33,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:42:33,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:33,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-29 13:42:33,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:33,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:42:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-29 13:42:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:42:33,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:33,616 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:42:33,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:33,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:33,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:33,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:33,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:33,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:42:33,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:33,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:33,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:33,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:33,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:33,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:33,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959946944] [2020-10-29 13:42:33,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:33,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:42:33,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475901071] [2020-10-29 13:42:33,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:42:33,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:33,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:42:33,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:42:33,651 INFO L87 Difference]: Start difference. First operand 9906 states and 14865 transitions. Second operand 5 states. [2020-10-29 13:42:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:35,733 INFO L93 Difference]: Finished difference Result 20293 states and 30211 transitions. [2020-10-29 13:42:35,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:42:35,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-10-29 13:42:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:35,821 INFO L225 Difference]: With dead ends: 20293 [2020-10-29 13:42:35,821 INFO L226 Difference]: Without dead ends: 20290 [2020-10-29 13:42:35,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:42:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20290 states. [2020-10-29 13:42:36,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20290 to 10418. [2020-10-29 13:42:36,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10418 states. [2020-10-29 13:42:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10418 states to 10418 states and 15377 transitions. [2020-10-29 13:42:37,008 INFO L78 Accepts]: Start accepts. Automaton has 10418 states and 15377 transitions. Word has length 60 [2020-10-29 13:42:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:37,009 INFO L481 AbstractCegarLoop]: Abstraction has 10418 states and 15377 transitions. [2020-10-29 13:42:37,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:42:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 10418 states and 15377 transitions. [2020-10-29 13:42:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 13:42:37,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:37,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:37,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:42:37,011 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:37,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:37,012 INFO L82 PathProgramCache]: Analyzing trace with hash 975238375, now seen corresponding path program 1 times [2020-10-29 13:42:37,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:37,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418782813] [2020-10-29 13:42:37,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:37,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:37,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:37,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 13:42:37,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:37,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-29 13:42:37,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:37,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:37,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:37,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:42:37,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:42:37,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:37,328 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:42:37,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:37,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:37,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:37,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:37,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:37,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:42:37,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:37,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:37,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:37,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418782813] [2020-10-29 13:42:37,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:37,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:42:37,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882186389] [2020-10-29 13:42:37,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:42:37,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:37,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:42:37,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:42:37,370 INFO L87 Difference]: Start difference. First operand 10418 states and 15377 transitions. Second operand 4 states. [2020-10-29 13:42:37,544 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:42:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:38,997 INFO L93 Difference]: Finished difference Result 23170 states and 34147 transitions. [2020-10-29 13:42:38,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:42:38,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-29 13:42:38,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:39,036 INFO L225 Difference]: With dead ends: 23170 [2020-10-29 13:42:39,037 INFO L226 Difference]: Without dead ends: 12783 [2020-10-29 13:42:39,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:42:39,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12783 states. [2020-10-29 13:42:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12783 to 12780. [2020-10-29 13:42:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12780 states. [2020-10-29 13:42:40,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12780 states to 12780 states and 18743 transitions. [2020-10-29 13:42:40,409 INFO L78 Accepts]: Start accepts. Automaton has 12780 states and 18743 transitions. Word has length 61 [2020-10-29 13:42:40,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:40,409 INFO L481 AbstractCegarLoop]: Abstraction has 12780 states and 18743 transitions. [2020-10-29 13:42:40,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:42:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 12780 states and 18743 transitions. [2020-10-29 13:42:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:42:40,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:40,424 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:40,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:42:40,424 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1696154466, now seen corresponding path program 1 times [2020-10-29 13:42:40,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:40,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833774328] [2020-10-29 13:42:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:40,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:40,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:41,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:42,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:42,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:42:42,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:42:42,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1756 [2020-10-29 13:42:42,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:42,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:42,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:42:42,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:42:42,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 13:42:42,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:42,477 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:42:42,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:42,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:42,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:42,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:42,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:42,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:42:42,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:42,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:42,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:42,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:42,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:42,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:42:42,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833774328] [2020-10-29 13:42:42,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:42:42,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 13:42:42,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306060939] [2020-10-29 13:42:42,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:42:42,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:42,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:42:42,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:42:42,532 INFO L87 Difference]: Start difference. First operand 12780 states and 18743 transitions. Second operand 5 states. [2020-10-29 13:42:42,726 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:42:43,655 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:42:44,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:44,755 INFO L93 Difference]: Finished difference Result 32229 states and 47325 transitions. [2020-10-29 13:42:44,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:42:44,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-29 13:42:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:44,806 INFO L225 Difference]: With dead ends: 32229 [2020-10-29 13:42:44,807 INFO L226 Difference]: Without dead ends: 21842 [2020-10-29 13:42:44,831 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 [2020-10-29 13:42:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21842 states. [2020-10-29 13:42:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21842 to 21836. [2020-10-29 13:42:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21836 states. [2020-10-29 13:42:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21836 states to 21836 states and 31735 transitions. [2020-10-29 13:42:46,678 INFO L78 Accepts]: Start accepts. Automaton has 21836 states and 31735 transitions. Word has length 82 [2020-10-29 13:42:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:46,678 INFO L481 AbstractCegarLoop]: Abstraction has 21836 states and 31735 transitions. [2020-10-29 13:42:46,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:42:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 21836 states and 31735 transitions. [2020-10-29 13:42:46,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:42:46,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:46,687 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:46,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:42:46,688 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:46,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:46,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1230511104, now seen corresponding path program 1 times [2020-10-29 13:42:46,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:46,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843589244] [2020-10-29 13:42:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:46,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:46,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:46,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:47,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:47,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:47,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:48,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:51,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:51,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:42:51,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:42:51,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:42:51,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:51,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:51,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:42:51,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:42:51,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:42:51,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:42:52,019 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:42:52,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:52,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:52,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:52,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:52,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:52,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:42:52,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:52,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:52,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:52,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:52,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:52,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:42:52,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843589244] [2020-10-29 13:42:52,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:42:52,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:42:52,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825690555] [2020-10-29 13:42:52,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:42:52,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:52,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:42:52,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:42:52,065 INFO L87 Difference]: Start difference. First operand 21836 states and 31735 transitions. Second operand 7 states. [2020-10-29 13:42:52,319 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:42:53,596 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:42:53,777 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:42:55,749 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:42:55,986 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:42:56,176 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:42:56,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:56,799 INFO L93 Difference]: Finished difference Result 63903 states and 94137 transitions. [2020-10-29 13:42:56,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:42:56,800 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-29 13:42:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:56,940 INFO L225 Difference]: With dead ends: 63903 [2020-10-29 13:42:56,940 INFO L226 Difference]: Without dead ends: 53480 [2020-10-29 13:42:56,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:42:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53480 states. [2020-10-29 13:43:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53480 to 35592. [2020-10-29 13:43:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35592 states. [2020-10-29 13:43:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35592 states to 35592 states and 51811 transitions. [2020-10-29 13:43:00,385 INFO L78 Accepts]: Start accepts. Automaton has 35592 states and 51811 transitions. Word has length 83 [2020-10-29 13:43:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:00,385 INFO L481 AbstractCegarLoop]: Abstraction has 35592 states and 51811 transitions. [2020-10-29 13:43:00,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:43:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 35592 states and 51811 transitions. [2020-10-29 13:43:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:43:00,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:00,394 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:00,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:43:00,394 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:00,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:00,395 INFO L82 PathProgramCache]: Analyzing trace with hash -719409301, now seen corresponding path program 1 times [2020-10-29 13:43:00,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:00,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460662064] [2020-10-29 13:43:00,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:00,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:00,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:00,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:04,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:04,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:43:04,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:43:04,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3741 [2020-10-29 13:43:04,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:04,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:04,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:43:04,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:43:04,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 13:43:04,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:04,382 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:43:04,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:04,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:04,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:04,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:04,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:04,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:43:04,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:04,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:04,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:04,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:04,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:04,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:43:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 13:43:04,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460662064] [2020-10-29 13:43:04,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:43:04,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:43:04,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916744987] [2020-10-29 13:43:04,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:43:04,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:04,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:43:04,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:43:04,424 INFO L87 Difference]: Start difference. First operand 35592 states and 51811 transitions. Second operand 7 states. [2020-10-29 13:43:04,664 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:43:05,771 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:43:05,961 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:43:08,536 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:43:08,742 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:43:08,935 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:43:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:09,949 INFO L93 Difference]: Finished difference Result 76439 states and 111741 transitions. [2020-10-29 13:43:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:43:09,950 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-29 13:43:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:10,082 INFO L225 Difference]: With dead ends: 76439 [2020-10-29 13:43:10,083 INFO L226 Difference]: Without dead ends: 59540 [2020-10-29 13:43:10,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:43:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59540 states. [2020-10-29 13:43:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59540 to 42352. [2020-10-29 13:43:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42352 states. [2020-10-29 13:43:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42352 states to 42352 states and 61595 transitions. [2020-10-29 13:43:13,219 INFO L78 Accepts]: Start accepts. Automaton has 42352 states and 61595 transitions. Word has length 83 [2020-10-29 13:43:13,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:13,219 INFO L481 AbstractCegarLoop]: Abstraction has 42352 states and 61595 transitions. [2020-10-29 13:43:13,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:43:13,220 INFO L276 IsEmpty]: Start isEmpty. Operand 42352 states and 61595 transitions. [2020-10-29 13:43:13,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:43:13,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:13,229 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:13,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:43:13,230 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:13,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:13,231 INFO L82 PathProgramCache]: Analyzing trace with hash 693254636, now seen corresponding path program 1 times [2020-10-29 13:43:13,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:13,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102207534] [2020-10-29 13:43:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:13,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:13,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:13,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:13,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:14,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:15,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:18,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:18,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:18,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:43:18,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:43:18,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:43:18,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:18,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:18,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:43:18,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:43:18,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 13:43:18,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:18,506 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:43:18,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:18,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:18,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:18,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:18,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:18,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:43:18,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:18,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:18,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:18,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:18,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:18,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 13:43:18,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102207534] [2020-10-29 13:43:18,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:43:18,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:43:18,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316099622] [2020-10-29 13:43:18,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:43:18,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:18,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:43:18,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:43:18,561 INFO L87 Difference]: Start difference. First operand 42352 states and 61595 transitions. Second operand 7 states. [2020-10-29 13:43:18,781 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:43:19,871 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:43:20,203 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:43:23,009 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:43:23,216 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:43:23,437 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:43:24,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:24,511 INFO L93 Difference]: Finished difference Result 77993 states and 113805 transitions. [2020-10-29 13:43:24,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:43:24,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-29 13:43:24,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:24,614 INFO L225 Difference]: With dead ends: 77993 [2020-10-29 13:43:24,614 INFO L226 Difference]: Without dead ends: 66294 [2020-10-29 13:43:24,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:43:24,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66294 states. [2020-10-29 13:43:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66294 to 48368. [2020-10-29 13:43:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48368 states. [2020-10-29 13:43:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48368 states to 48368 states and 70339 transitions. [2020-10-29 13:43:28,327 INFO L78 Accepts]: Start accepts. Automaton has 48368 states and 70339 transitions. Word has length 83 [2020-10-29 13:43:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:28,327 INFO L481 AbstractCegarLoop]: Abstraction has 48368 states and 70339 transitions. [2020-10-29 13:43:28,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:43:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 48368 states and 70339 transitions. [2020-10-29 13:43:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:43:28,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:28,335 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:28,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:43:28,335 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:28,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1513754237, now seen corresponding path program 1 times [2020-10-29 13:43:28,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:28,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195689828] [2020-10-29 13:43:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:28,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:28,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:28,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:28,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:28,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:30,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:31,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:33,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:33,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:43:33,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:43:33,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:43:33,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:33,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:43:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:43:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 13:43:33,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:33,581 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:43:33,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:33,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:33,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:33,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:33,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:33,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:43:33,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:33,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:33,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:33,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:33,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:33,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 13:43:33,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195689828] [2020-10-29 13:43:33,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:43:33,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:43:33,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019513191] [2020-10-29 13:43:33,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:43:33,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:33,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:43:33,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:43:33,621 INFO L87 Difference]: Start difference. First operand 48368 states and 70339 transitions. Second operand 7 states. [2020-10-29 13:43:33,850 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:43:34,818 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:43:35,015 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:43:37,918 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:43:38,134 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:43:38,349 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:43:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:39,461 INFO L93 Difference]: Finished difference Result 75475 states and 109905 transitions. [2020-10-29 13:43:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:43:39,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-29 13:43:39,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:39,678 INFO L225 Difference]: With dead ends: 75475 [2020-10-29 13:43:39,678 INFO L226 Difference]: Without dead ends: 69408 [2020-10-29 13:43:39,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:43:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69408 states. [2020-10-29 13:43:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69408 to 51484. [2020-10-29 13:43:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51484 states. [2020-10-29 13:43:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51484 states to 51484 states and 74855 transitions. [2020-10-29 13:43:43,631 INFO L78 Accepts]: Start accepts. Automaton has 51484 states and 74855 transitions. Word has length 83 [2020-10-29 13:43:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:43,631 INFO L481 AbstractCegarLoop]: Abstraction has 51484 states and 74855 transitions. [2020-10-29 13:43:43,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:43:43,631 INFO L276 IsEmpty]: Start isEmpty. Operand 51484 states and 74855 transitions. [2020-10-29 13:43:43,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:43:43,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:43,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:43,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:43:43,640 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:43,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:43,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1209006076, now seen corresponding path program 1 times [2020-10-29 13:43:43,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:43,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529996400] [2020-10-29 13:43:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:43,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:43,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:43,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:43,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:44,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:44,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:44,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:45,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:46,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:48,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:48,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:43:48,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:43:48,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:43:48,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:48,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:48,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:43:48,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:43:48,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 13:43:48,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:48,977 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:43:48,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:48,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:49,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:49,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:49,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:49,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:43:49,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:49,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:49,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:43:49,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:49,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:43:49,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:49,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529996400] [2020-10-29 13:43:49,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:43:49,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:43:49,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597717965] [2020-10-29 13:43:49,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:43:49,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:49,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:43:49,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:43:49,034 INFO L87 Difference]: Start difference. First operand 51484 states and 74855 transitions. Second operand 8 states. [2020-10-29 13:43:49,258 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:43:50,563 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:43:50,889 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:43:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:55,423 INFO L93 Difference]: Finished difference Result 122350 states and 176521 transitions. [2020-10-29 13:43:55,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:43:55,424 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-10-29 13:43:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:55,526 INFO L225 Difference]: With dead ends: 122350 [2020-10-29 13:43:55,526 INFO L226 Difference]: Without dead ends: 70899 [2020-10-29 13:43:55,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:43:55,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70899 states. [2020-10-29 13:44:00,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70899 to 51412. [2020-10-29 13:44:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51412 states. [2020-10-29 13:44:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51412 states to 51412 states and 73087 transitions. [2020-10-29 13:44:00,229 INFO L78 Accepts]: Start accepts. Automaton has 51412 states and 73087 transitions. Word has length 86 [2020-10-29 13:44:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:00,229 INFO L481 AbstractCegarLoop]: Abstraction has 51412 states and 73087 transitions. [2020-10-29 13:44:00,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:44:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 51412 states and 73087 transitions. [2020-10-29 13:44:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:44:00,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:00,238 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:00,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:44:00,238 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:00,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:00,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1975563058, now seen corresponding path program 1 times [2020-10-29 13:44:00,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:00,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435383756] [2020-10-29 13:44:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:00,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:00,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:00,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:00,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:00,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:05,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:05,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:44:05,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:44:05,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4849 [2020-10-29 13:44:05,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:05,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:05,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:44:05,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:05,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 13:44:05,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:05,593 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:05,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:05,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:05,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:05,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:05,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:05,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:44:05,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:05,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:05,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:05,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:05,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:05,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:05,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435383756] [2020-10-29 13:44:05,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:44:05,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:44:05,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222597478] [2020-10-29 13:44:05,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:44:05,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:05,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:44:05,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:44:05,668 INFO L87 Difference]: Start difference. First operand 51412 states and 73087 transitions. Second operand 8 states. [2020-10-29 13:44:05,886 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:44:07,576 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:44:08,009 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:44:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:18,289 INFO L93 Difference]: Finished difference Result 181816 states and 257819 transitions. [2020-10-29 13:44:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:44:18,289 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-10-29 13:44:18,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:18,470 INFO L225 Difference]: With dead ends: 181816 [2020-10-29 13:44:18,470 INFO L226 Difference]: Without dead ends: 130437 [2020-10-29 13:44:18,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:44:18,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130437 states. [2020-10-29 13:44:25,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130437 to 67949. [2020-10-29 13:44:25,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67949 states. [2020-10-29 13:44:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67949 states to 67949 states and 95040 transitions. [2020-10-29 13:44:25,525 INFO L78 Accepts]: Start accepts. Automaton has 67949 states and 95040 transitions. Word has length 86 [2020-10-29 13:44:25,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:25,525 INFO L481 AbstractCegarLoop]: Abstraction has 67949 states and 95040 transitions. [2020-10-29 13:44:25,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:44:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 67949 states and 95040 transitions. [2020-10-29 13:44:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:44:25,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:25,532 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:25,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:44:25,533 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:25,533 INFO L82 PathProgramCache]: Analyzing trace with hash -231445815, now seen corresponding path program 1 times [2020-10-29 13:44:25,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:25,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044306765] [2020-10-29 13:44:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:25,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:25,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:25,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:25,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:26,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:30,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:30,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:44:30,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:44:30,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:44:30,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:30,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:30,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:44:30,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:30,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 13:44:30,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:30,879 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:30,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:30,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:30,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:30,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:30,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:30,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:44:30,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:30,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:30,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:30,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:30,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:30,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:30,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044306765] [2020-10-29 13:44:30,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:44:30,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:44:30,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288304698] [2020-10-29 13:44:30,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:44:30,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:30,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:44:30,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:44:30,930 INFO L87 Difference]: Start difference. First operand 67949 states and 95040 transitions. Second operand 8 states. [2020-10-29 13:44:31,155 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:44:33,317 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:44:33,949 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:44:49,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:49,594 INFO L93 Difference]: Finished difference Result 228009 states and 317569 transitions. [2020-10-29 13:44:49,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:44:49,595 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-10-29 13:44:49,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:50,088 INFO L225 Difference]: With dead ends: 228009 [2020-10-29 13:44:50,089 INFO L226 Difference]: Without dead ends: 160093 [2020-10-29 13:44:50,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:44:50,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160093 states. [2020-10-29 13:45:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160093 to 90792. [2020-10-29 13:45:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90792 states. [2020-10-29 13:45:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90792 states to 90792 states and 125205 transitions. [2020-10-29 13:45:00,683 INFO L78 Accepts]: Start accepts. Automaton has 90792 states and 125205 transitions. Word has length 86 [2020-10-29 13:45:00,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:00,684 INFO L481 AbstractCegarLoop]: Abstraction has 90792 states and 125205 transitions. [2020-10-29 13:45:00,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:45:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 90792 states and 125205 transitions. [2020-10-29 13:45:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:45:00,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:00,695 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:00,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:45:00,695 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:00,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1060749381, now seen corresponding path program 1 times [2020-10-29 13:45:00,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:00,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400512288] [2020-10-29 13:45:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:00,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:00,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:00,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:01,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:01,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:01,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:01,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:02,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:02,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:03,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:03,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:03,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:05,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:05,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:45:05,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:45:05,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:45:05,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:05,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:05,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:45:05,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:45:05,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:45:05,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:05,927 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:45:05,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:05,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:05,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:05,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:05,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:05,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:45:05,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:05,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:05,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:05,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:05,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:05,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:45:05,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400512288] [2020-10-29 13:45:05,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:45:05,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:45:05,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540686387] [2020-10-29 13:45:05,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:45:05,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:05,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:45:05,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:45:05,959 INFO L87 Difference]: Start difference. First operand 90792 states and 125205 transitions. Second operand 6 states. [2020-10-29 13:45:06,156 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:45:10,091 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:45:10,548 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 152