/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=SHALLOWEST --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.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:54:51,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:54:51,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:54:51,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:54:51,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:54:51,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:54:51,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:54:51,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:54:51,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:54:51,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:54:51,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:54:51,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:54:51,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:54:51,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:54:51,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:54:51,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:54:51,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:54:51,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:54:51,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:54:51,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:54:51,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:54:51,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:54:51,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:54:51,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:54:51,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:54:51,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:54:51,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:54:51,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:54:51,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:54:51,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:54:51,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:54:51,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:54:51,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:54:51,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:54:51,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:54:51,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:54:51,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:54:51,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:54:51,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:54:51,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:54:51,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:54:51,317 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 [2020-10-27 05:54:51,366 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:54:51,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:54:51,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:54:51,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:54:51,372 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:54:51,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:54:51,373 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:54:51,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:54:51,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:54:51,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:54:51,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:54:51,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:54:51,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:54:51,376 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:54:51,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:54:51,376 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:54:51,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:54:51,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:54:51,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:54:51,377 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:54:51,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:54:51,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:54:51,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:54:51,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:54:51,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:54:51,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:54:51,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:54:51,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:54:51,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:54:51,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:54:51,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:54:51,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:54:51,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:54:51,819 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:54:51,820 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:54:51,822 INFO L432 ainManager$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.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:54:51,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97d38f6dd/4cc5316a653a450688193e6c8d305a43/FLAGafba069c3 [2020-10-27 05:54:52,626 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:54:52,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:54:52,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97d38f6dd/4cc5316a653a450688193e6c8d305a43/FLAGafba069c3 [2020-10-27 05:54:52,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97d38f6dd/4cc5316a653a450688193e6c8d305a43 [2020-10-27 05:54:52,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:54:52,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:54:52,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:54:52,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:54:52,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:54:52,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:54:52" (1/1) ... [2020-10-27 05:54:52,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a21b146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:52, skipping insertion in model container [2020-10-27 05:54:52,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:54:52" (1/1) ... [2020-10-27 05:54:52,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:54:53,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:54:53,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:54:53,518 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:54:53,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:54:53,714 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:54:53,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:53 WrapperNode [2020-10-27 05:54:53,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:54:53,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:54:53,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:54:53,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:54:53,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:53" (1/1) ... [2020-10-27 05:54:53,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:53" (1/1) ... [2020-10-27 05:54:53,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:53" (1/1) ... [2020-10-27 05:54:53,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:53" (1/1) ... [2020-10-27 05:54:53,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:53" (1/1) ... [2020-10-27 05:54:53,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:53" (1/1) ... [2020-10-27 05:54:53,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:53" (1/1) ... [2020-10-27 05:54:53,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:54:53,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:54:53,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:54:53,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:54:53,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:54:53,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:54:53,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:54:53,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:54:53,892 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:54:53,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:54:53,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:54:53,892 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:54:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:54:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:54:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:54:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:54:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:54:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:54:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:54:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:54:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:54:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:54:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:54:53,895 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:54:53,895 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:54:53,895 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:54:53,895 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:54:53,895 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:54:53,895 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:54:53,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:54:53,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:54:53,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:54:53,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:54:53,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:54:53,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:54:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:54:55,240 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:54:55,240 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:54:55,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:54:55 BoogieIcfgContainer [2020-10-27 05:54:55,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:54:55,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:54:55,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:54:55,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:54:55,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:54:52" (1/3) ... [2020-10-27 05:54:55,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbfd9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:54:55, skipping insertion in model container [2020-10-27 05:54:55,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:53" (2/3) ... [2020-10-27 05:54:55,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbfd9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:54:55, skipping insertion in model container [2020-10-27 05:54:55,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:54:55" (3/3) ... [2020-10-27 05:54:55,253 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:54:55,264 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:54:55,269 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:54:55,283 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:54:55,315 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:54:55,316 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:54:55,316 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:54:55,316 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:54:55,316 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:54:55,316 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:54:55,316 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:54:55,317 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:54:55,340 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states. [2020-10-27 05:54:55,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:54:55,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:55,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:54:55,355 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:55,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:55,362 INFO L82 PathProgramCache]: Analyzing trace with hash 723589953, now seen corresponding path program 1 times [2020-10-27 05:54:55,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:55,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209711522] [2020-10-27 05:54:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:55,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:55,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:56,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:56,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:57,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:58,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:00,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:00,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:55:00,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:55:00,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 05:55:00,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:00,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:55:00,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:55:00,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:55:00,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:55:01,573 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:01,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:01,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:01,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:01,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:01,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:01,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:55:01,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:01,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:01,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:01,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:01,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:01,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209711522] [2020-10-27 05:55:01,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:01,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:55:01,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142423773] [2020-10-27 05:55:01,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:55:01,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:01,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:55:01,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:55:01,732 INFO L87 Difference]: Start difference. First operand 174 states. Second operand 9 states. [2020-10-27 05:55:02,308 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:55:04,319 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:55:04,743 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 05:55:05,175 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:55:05,560 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:55:05,948 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:55:06,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:06,083 INFO L93 Difference]: Finished difference Result 1035 states and 1644 transitions. [2020-10-27 05:55:06,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:55:06,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-10-27 05:55:06,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:06,122 INFO L225 Difference]: With dead ends: 1035 [2020-10-27 05:55:06,123 INFO L226 Difference]: Without dead ends: 881 [2020-10-27 05:55:06,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:55:06,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2020-10-27 05:55:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 283. [2020-10-27 05:55:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-27 05:55:06,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 422 transitions. [2020-10-27 05:55:06,277 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 422 transitions. Word has length 79 [2020-10-27 05:55:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:06,278 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 422 transitions. [2020-10-27 05:55:06,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:55:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 422 transitions. [2020-10-27 05:55:06,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:55:06,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:06,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:06,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:55:06,292 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash 381577461, now seen corresponding path program 1 times [2020-10-27 05:55:06,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:06,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116810968] [2020-10-27 05:55:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:06,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:06,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:06,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:06,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:06,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:08,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:11,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:11,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:55:11,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:55:11,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:55:11,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:11,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:11,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 05:55:11,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:55:11,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:11,741 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:11,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:11,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:11,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:11,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:11,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:11,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:55:11,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:11,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:11,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:11,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:11,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:11,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116810968] [2020-10-27 05:55:11,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:11,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:55:11,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965729095] [2020-10-27 05:55:11,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:55:11,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:11,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:55:11,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:55:11,800 INFO L87 Difference]: Start difference. First operand 283 states and 422 transitions. Second operand 4 states. [2020-10-27 05:55:12,205 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:55:13,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:13,424 INFO L93 Difference]: Finished difference Result 721 states and 1118 transitions. [2020-10-27 05:55:13,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:55:13,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-27 05:55:13,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:13,428 INFO L225 Difference]: With dead ends: 721 [2020-10-27 05:55:13,429 INFO L226 Difference]: Without dead ends: 486 [2020-10-27 05:55:13,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:13,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-10-27 05:55:13,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 483. [2020-10-27 05:55:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2020-10-27 05:55:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 740 transitions. [2020-10-27 05:55:13,494 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 740 transitions. Word has length 80 [2020-10-27 05:55:13,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:13,498 INFO L481 AbstractCegarLoop]: Abstraction has 483 states and 740 transitions. [2020-10-27 05:55:13,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:55:13,498 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 740 transitions. [2020-10-27 05:55:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:55:13,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:13,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:13,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:55:13,503 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:13,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:13,503 INFO L82 PathProgramCache]: Analyzing trace with hash -52737764, now seen corresponding path program 1 times [2020-10-27 05:55:13,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:13,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555092496] [2020-10-27 05:55:13,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:13,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:13,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:13,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:13,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:14,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:16,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:16,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:55:16,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:55:16,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2573 [2020-10-27 05:55:16,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:16,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:16,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 05:55:16,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:55:16,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:55:16,504 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:16,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:16,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:16,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:16,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:16,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:16,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:55:16,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:16,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:16,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:16,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:16,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:16,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555092496] [2020-10-27 05:55:16,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:16,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:55:16,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14588178] [2020-10-27 05:55:16,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:55:16,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:16,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:55:16,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:55:16,567 INFO L87 Difference]: Start difference. First operand 483 states and 740 transitions. Second operand 4 states. [2020-10-27 05:55:16,927 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:55:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:18,219 INFO L93 Difference]: Finished difference Result 1289 states and 2020 transitions. [2020-10-27 05:55:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:55:18,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-27 05:55:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:18,226 INFO L225 Difference]: With dead ends: 1289 [2020-10-27 05:55:18,226 INFO L226 Difference]: Without dead ends: 854 [2020-10-27 05:55:18,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:18,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2020-10-27 05:55:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 851. [2020-10-27 05:55:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 851 states. [2020-10-27 05:55:18,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1322 transitions. [2020-10-27 05:55:18,288 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1322 transitions. Word has length 81 [2020-10-27 05:55:18,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:18,289 INFO L481 AbstractCegarLoop]: Abstraction has 851 states and 1322 transitions. [2020-10-27 05:55:18,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:55:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1322 transitions. [2020-10-27 05:55:18,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:55:18,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:18,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:18,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:55:18,291 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:18,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1412964928, now seen corresponding path program 1 times [2020-10-27 05:55:18,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:18,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103185162] [2020-10-27 05:55:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:18,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:18,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:18,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:18,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:19,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:19,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:55:19,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:55:19,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1299 [2020-10-27 05:55:19,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:19,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:19,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 05:55:19,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:55:19,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:19,983 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:19,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:19,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:20,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:20,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:20,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:20,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:55:20,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:20,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:55:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:20,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103185162] [2020-10-27 05:55:20,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:20,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:55:20,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285202715] [2020-10-27 05:55:20,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:55:20,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:20,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:55:20,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:55:20,035 INFO L87 Difference]: Start difference. First operand 851 states and 1322 transitions. Second operand 4 states. [2020-10-27 05:55:20,434 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:55:21,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:21,588 INFO L93 Difference]: Finished difference Result 2329 states and 3662 transitions. [2020-10-27 05:55:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:55:21,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-27 05:55:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:21,599 INFO L225 Difference]: With dead ends: 2329 [2020-10-27 05:55:21,599 INFO L226 Difference]: Without dead ends: 1526 [2020-10-27 05:55:21,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:21,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2020-10-27 05:55:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1523. [2020-10-27 05:55:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1523 states. [2020-10-27 05:55:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2378 transitions. [2020-10-27 05:55:21,698 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2378 transitions. Word has length 82 [2020-10-27 05:55:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:21,698 INFO L481 AbstractCegarLoop]: Abstraction has 1523 states and 2378 transitions. [2020-10-27 05:55:21,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:55:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2378 transitions. [2020-10-27 05:55:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:55:21,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:21,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:21,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:55:21,701 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:21,701 INFO L82 PathProgramCache]: Analyzing trace with hash 407189745, now seen corresponding path program 1 times [2020-10-27 05:55:21,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:21,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437153618] [2020-10-27 05:55:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:21,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:21,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:21,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:22,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:22,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:55:22,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:55:22,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-27 05:55:22,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:22,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:22,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 05:55:22,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:55:22,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:22,755 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:22,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:22,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:22,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:22,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:22,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:22,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:55:22,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:22,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:22,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:22,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:22,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:22,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437153618] [2020-10-27 05:55:22,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:22,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:55:22,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426610035] [2020-10-27 05:55:22,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:55:22,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:22,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:55:22,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:55:22,809 INFO L87 Difference]: Start difference. First operand 1523 states and 2378 transitions. Second operand 4 states. [2020-10-27 05:55:23,203 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:55:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:24,451 INFO L93 Difference]: Finished difference Result 4217 states and 6622 transitions. [2020-10-27 05:55:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:55:24,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-27 05:55:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:24,469 INFO L225 Difference]: With dead ends: 4217 [2020-10-27 05:55:24,469 INFO L226 Difference]: Without dead ends: 2742 [2020-10-27 05:55:24,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2020-10-27 05:55:24,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 2739. [2020-10-27 05:55:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2020-10-27 05:55:24,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4274 transitions. [2020-10-27 05:55:24,683 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4274 transitions. Word has length 83 [2020-10-27 05:55:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:24,685 INFO L481 AbstractCegarLoop]: Abstraction has 2739 states and 4274 transitions. [2020-10-27 05:55:24,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:55:24,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4274 transitions. [2020-10-27 05:55:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:55:24,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:24,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:24,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:55:24,690 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:24,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:24,690 INFO L82 PathProgramCache]: Analyzing trace with hash -179297121, now seen corresponding path program 1 times [2020-10-27 05:55:24,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:24,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339792332] [2020-10-27 05:55:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:24,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:24,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:25,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:25,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:55:25,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:55:25,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-27 05:55:25,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:25,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:25,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 05:55:25,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:55:25,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:25,532 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:25,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:25,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:25,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:25,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:25,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:25,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:55:25,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:25,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:25,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339792332] [2020-10-27 05:55:25,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:25,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:55:25,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859820414] [2020-10-27 05:55:25,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:55:25,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:25,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:55:25,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:55:25,595 INFO L87 Difference]: Start difference. First operand 2739 states and 4274 transitions. Second operand 4 states. [2020-10-27 05:55:26,003 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:55:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:27,306 INFO L93 Difference]: Finished difference Result 7609 states and 11894 transitions. [2020-10-27 05:55:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:55:27,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-27 05:55:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:27,337 INFO L225 Difference]: With dead ends: 7609 [2020-10-27 05:55:27,337 INFO L226 Difference]: Without dead ends: 4918 [2020-10-27 05:55:27,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:27,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4918 states. [2020-10-27 05:55:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4918 to 4915. [2020-10-27 05:55:27,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4915 states. [2020-10-27 05:55:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 7634 transitions. [2020-10-27 05:55:27,706 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 7634 transitions. Word has length 84 [2020-10-27 05:55:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:27,706 INFO L481 AbstractCegarLoop]: Abstraction has 4915 states and 7634 transitions. [2020-10-27 05:55:27,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:55:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 7634 transitions. [2020-10-27 05:55:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:55:27,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:27,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:27,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:55:27,708 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:27,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:27,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1844247078, now seen corresponding path program 1 times [2020-10-27 05:55:27,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:27,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795863088] [2020-10-27 05:55:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:27,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:28,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:28,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:28,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:55:28,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:55:28,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1019 [2020-10-27 05:55:28,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:28,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:55:28,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:55:28,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:55:28,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:29,270 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:29,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:29,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:29,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:29,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:29,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:29,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:55:29,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:29,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:29,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:29,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:29,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:29,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795863088] [2020-10-27 05:55:29,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:29,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:55:29,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708441639] [2020-10-27 05:55:29,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:55:29,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:29,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:55:29,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:55:29,406 INFO L87 Difference]: Start difference. First operand 4915 states and 7634 transitions. Second operand 9 states. [2020-10-27 05:55:30,811 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 05:55:31,288 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:55:31,681 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 05:55:32,108 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:55:32,541 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:55:32,949 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-27 05:55:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:35,777 INFO L93 Difference]: Finished difference Result 30117 states and 46558 transitions. [2020-10-27 05:55:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:55:35,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2020-10-27 05:55:35,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:35,896 INFO L225 Difference]: With dead ends: 30117 [2020-10-27 05:55:35,896 INFO L226 Difference]: Without dead ends: 25250 [2020-10-27 05:55:35,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:55:35,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25250 states. [2020-10-27 05:55:37,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25250 to 25235. [2020-10-27 05:55:37,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25235 states. [2020-10-27 05:55:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25235 states to 25235 states and 38898 transitions. [2020-10-27 05:55:38,140 INFO L78 Accepts]: Start accepts. Automaton has 25235 states and 38898 transitions. Word has length 85 [2020-10-27 05:55:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:38,141 INFO L481 AbstractCegarLoop]: Abstraction has 25235 states and 38898 transitions. [2020-10-27 05:55:38,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:55:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 25235 states and 38898 transitions. [2020-10-27 05:55:38,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:55:38,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:38,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:38,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:55:38,144 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:38,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1942278331, now seen corresponding path program 1 times [2020-10-27 05:55:38,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:38,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865146354] [2020-10-27 05:55:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:38,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:38,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:38,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:38,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:55:38,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:55:38,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-27 05:55:38,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:38,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:38,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 05:55:38,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:55:38,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:38,896 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:38,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:38,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:38,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:38,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:38,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:38,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:55:38,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:38,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:38,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:38,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:38,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:38,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865146354] [2020-10-27 05:55:38,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:38,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:55:38,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582449577] [2020-10-27 05:55:38,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:55:38,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:38,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:55:38,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:55:38,945 INFO L87 Difference]: Start difference. First operand 25235 states and 38898 transitions. Second operand 4 states. [2020-10-27 05:55:39,304 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:55:42,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:42,747 INFO L93 Difference]: Finished difference Result 69017 states and 105974 transitions. [2020-10-27 05:55:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:55:42,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-10-27 05:55:42,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:42,862 INFO L225 Difference]: With dead ends: 69017 [2020-10-27 05:55:42,863 INFO L226 Difference]: Without dead ends: 43830 [2020-10-27 05:55:42,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43830 states. [2020-10-27 05:55:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43830 to 43827. [2020-10-27 05:55:45,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43827 states. [2020-10-27 05:55:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43827 states to 43827 states and 66738 transitions. [2020-10-27 05:55:45,718 INFO L78 Accepts]: Start accepts. Automaton has 43827 states and 66738 transitions. Word has length 86 [2020-10-27 05:55:45,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:45,718 INFO L481 AbstractCegarLoop]: Abstraction has 43827 states and 66738 transitions. [2020-10-27 05:55:45,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:55:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 43827 states and 66738 transitions. [2020-10-27 05:55:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 05:55:45,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:45,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:45,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:55:45,720 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:45,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:45,721 INFO L82 PathProgramCache]: Analyzing trace with hash 879192195, now seen corresponding path program 1 times [2020-10-27 05:55:45,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:45,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050108722] [2020-10-27 05:55:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:45,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:45,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:46,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:46,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 05:55:46,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:55:46,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 621 [2020-10-27 05:55:46,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:46,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:55:46,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:55:46,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:55:46,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:46,760 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:46,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:46,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:46,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:46,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:46,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:46,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:55:46,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:46,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:46,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:46,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:55:46,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:46,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050108722] [2020-10-27 05:55:46,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:46,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:46,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466678097] [2020-10-27 05:55:46,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:55:46,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:46,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:55:46,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:55:46,830 INFO L87 Difference]: Start difference. First operand 43827 states and 66738 transitions. Second operand 6 states. [2020-10-27 05:55:47,244 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:55:49,418 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 05:55:52,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:52,932 INFO L93 Difference]: Finished difference Result 125049 states and 190582 transitions. [2020-10-27 05:55:52,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:55:52,933 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-27 05:55:52,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:53,149 INFO L225 Difference]: With dead ends: 125049 [2020-10-27 05:55:53,150 INFO L226 Difference]: Without dead ends: 81270 [2020-10-27 05:55:53,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:55:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81270 states. [2020-10-27 05:55:58,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81270 to 81267. [2020-10-27 05:55:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81267 states. [2020-10-27 05:55:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81267 states to 81267 states and 123186 transitions. [2020-10-27 05:55:58,333 INFO L78 Accepts]: Start accepts. Automaton has 81267 states and 123186 transitions. Word has length 87 [2020-10-27 05:55:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:58,333 INFO L481 AbstractCegarLoop]: Abstraction has 81267 states and 123186 transitions. [2020-10-27 05:55:58,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:55:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 81267 states and 123186 transitions. [2020-10-27 05:55:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 05:55:58,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:58,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:58,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:55:58,335 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:58,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:58,336 INFO L82 PathProgramCache]: Analyzing trace with hash 376147368, now seen corresponding path program 1 times [2020-10-27 05:55:58,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:58,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838245080] [2020-10-27 05:55:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:58,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:58,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:58,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 05:55:58,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:58,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-27 05:55:58,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:58,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:58,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-27 05:55:58,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:55:58,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:59,294 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:59,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:59,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:59,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:59,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:59,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:59,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:55:59,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:59,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:59,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:59,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:59,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:59,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838245080] [2020-10-27 05:55:59,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:59,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:59,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764814919] [2020-10-27 05:55:59,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:59,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:59,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:59,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:59,337 INFO L87 Difference]: Start difference. First operand 81267 states and 123186 transitions. Second operand 5 states. [2020-10-27 05:56:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:08,704 INFO L93 Difference]: Finished difference Result 165302 states and 249140 transitions. [2020-10-27 05:56:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:56:08,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-27 05:56:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:09,081 INFO L225 Difference]: With dead ends: 165302 [2020-10-27 05:56:09,082 INFO L226 Difference]: Without dead ends: 165299 [2020-10-27 05:56:09,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:56:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165299 states. [2020-10-27 05:56:15,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165299 to 84083. [2020-10-27 05:56:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84083 states. [2020-10-27 05:56:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84083 states to 84083 states and 126002 transitions. [2020-10-27 05:56:15,870 INFO L78 Accepts]: Start accepts. Automaton has 84083 states and 126002 transitions. Word has length 87 [2020-10-27 05:56:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:15,871 INFO L481 AbstractCegarLoop]: Abstraction has 84083 states and 126002 transitions. [2020-10-27 05:56:15,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:56:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 84083 states and 126002 transitions. [2020-10-27 05:56:15,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 05:56:15,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:15,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:15,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:56:15,873 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:15,873 INFO L82 PathProgramCache]: Analyzing trace with hash -926480737, now seen corresponding path program 1 times [2020-10-27 05:56:15,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:15,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341097744] [2020-10-27 05:56:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:15,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:16,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:16,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 05:56:16,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:16,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 05:56:16,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:16,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:56:16,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:56:16,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 05:56:16,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:16,386 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:56:16,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:16,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:16,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:16,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:16,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:16,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:56:16,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:16,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:16,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:16,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:16,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:56:16,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341097744] [2020-10-27 05:56:16,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:16,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:56:16,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045848397] [2020-10-27 05:56:16,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:56:16,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:16,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:56:16,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:56:16,437 INFO L87 Difference]: Start difference. First operand 84083 states and 126002 transitions. Second operand 4 states. [2020-10-27 05:56:17,011 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:56:24,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:24,322 INFO L93 Difference]: Finished difference Result 189723 states and 283816 transitions. [2020-10-27 05:56:24,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:56:24,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-10-27 05:56:24,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:24,503 INFO L225 Difference]: With dead ends: 189723 [2020-10-27 05:56:24,503 INFO L226 Difference]: Without dead ends: 105688 [2020-10-27 05:56:24,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:56:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105688 states. [2020-10-27 05:56:31,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105688 to 105333. [2020-10-27 05:56:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105333 states. [2020-10-27 05:56:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105333 states to 105333 states and 156804 transitions. [2020-10-27 05:56:31,973 INFO L78 Accepts]: Start accepts. Automaton has 105333 states and 156804 transitions. Word has length 88 [2020-10-27 05:56:31,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:31,973 INFO L481 AbstractCegarLoop]: Abstraction has 105333 states and 156804 transitions. [2020-10-27 05:56:31,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:56:31,973 INFO L276 IsEmpty]: Start isEmpty. Operand 105333 states and 156804 transitions. [2020-10-27 05:56:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 05:56:32,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:32,019 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:32,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:56:32,019 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:32,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1057527355, now seen corresponding path program 1 times [2020-10-27 05:56:32,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:32,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077237023] [2020-10-27 05:56:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:32,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:32,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:32,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:34,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:34,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 05:56:34,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:56:34,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2172 [2020-10-27 05:56:34,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:34,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:56:34,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:56:34,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 05:56:34,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:34,981 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:56:34,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:35,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:35,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:35,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:35,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:35,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 05:56:35,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:35,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:56:35,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:35,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:56:35,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:56:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:56:35,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077237023] [2020-10-27 05:56:35,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:56:35,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:56:35,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033065334] [2020-10-27 05:56:35,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:56:35,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:35,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:56:35,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:56:35,123 INFO L87 Difference]: Start difference. First operand 105333 states and 156804 transitions. Second operand 11 states. [2020-10-27 05:56:35,688 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:56:44,983 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 05:56:46,072 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:56:46,710 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:57:21,951 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:57:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:40,940 INFO L93 Difference]: Finished difference Result 893995 states and 1320982 transitions. [2020-10-27 05:57:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 05:57:40,941 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 119 [2020-10-27 05:57:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:43,114 INFO L225 Difference]: With dead ends: 893995 [2020-10-27 05:57:43,115 INFO L226 Difference]: Without dead ends: 788712 [2020-10-27 05:57:43,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=491, Invalid=1861, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 05:57:44,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788712 states.