/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.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:53:32,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:53:32,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:53:32,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:53:32,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:53:32,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:53:32,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:53:32,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:53:32,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:53:32,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:53:32,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:53:32,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:53:32,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:53:32,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:53:32,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:53:32,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:53:32,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:53:32,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:53:32,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:53:32,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:53:32,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:53:32,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:53:32,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:53:32,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:53:32,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:53:32,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:53:32,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:53:32,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:53:32,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:53:32,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:53:32,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:53:32,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:53:32,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:53:32,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:53:32,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:53:32,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:53:32,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:53:32,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:53:32,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:53:32,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:53:32,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:53:32,700 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 05:53:32,759 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:53:32,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:53:32,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:53:32,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:53:32,764 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:53:32,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:53:32,764 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:53:32,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:53:32,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:53:32,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:53:32,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:53:32,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:53:32,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:53:32,767 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:53:32,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:53:32,767 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:53:32,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:53:32,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:53:32,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:53:32,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:53:32,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:53:32,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:53:32,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:53:32,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:53:32,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:53:32,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:53:32,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:53:32,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:53:32,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:53:32,770 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:53:33,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:53:33,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:53:33,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:53:33,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:53:33,264 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:53:33,265 INFO L432 ainManager$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.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 05:53:33,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85478c56e/1590bd50756e4782bf6f3b9215163f90/FLAG0ad26d268 [2020-10-27 05:53:34,009 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:53:34,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 05:53:34,032 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85478c56e/1590bd50756e4782bf6f3b9215163f90/FLAG0ad26d268 [2020-10-27 05:53:34,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85478c56e/1590bd50756e4782bf6f3b9215163f90 [2020-10-27 05:53:34,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:53:34,347 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:53:34,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:53:34,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:53:34,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:53:34,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:53:34" (1/1) ... [2020-10-27 05:53:34,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5931a6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:34, skipping insertion in model container [2020-10-27 05:53:34,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:53:34" (1/1) ... [2020-10-27 05:53:34,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:53:34,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:53:34,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:53:34,859 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:53:34,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:53:35,003 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:53:35,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:35 WrapperNode [2020-10-27 05:53:35,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:53:35,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:53:35,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:53:35,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:53:35,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:35" (1/1) ... [2020-10-27 05:53:35,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:35" (1/1) ... [2020-10-27 05:53:35,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:35" (1/1) ... [2020-10-27 05:53:35,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:35" (1/1) ... [2020-10-27 05:53:35,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:35" (1/1) ... [2020-10-27 05:53:35,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:35" (1/1) ... [2020-10-27 05:53:35,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:35" (1/1) ... [2020-10-27 05:53:35,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:53:35,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:53:35,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:53:35,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:53:35,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:35" (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 05:53:35,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:53:35,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:53:35,254 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:53:35,255 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:53:35,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:53:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:53:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:53:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:53:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:53:35,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:53:35,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:53:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:53:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:53:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:53:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:53:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:53:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:53:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:53:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:53:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:53:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:53:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:53:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:53:35,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:53:35,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:53:35,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:53:35,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:53:35,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:53:35,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:53:35,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:53:36,345 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:53:36,345 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:53:36,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:53:36 BoogieIcfgContainer [2020-10-27 05:53:36,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:53:36,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:53:36,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:53:36,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:53:36,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:53:34" (1/3) ... [2020-10-27 05:53:36,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a390dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:53:36, skipping insertion in model container [2020-10-27 05:53:36,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:35" (2/3) ... [2020-10-27 05:53:36,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a390dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:53:36, skipping insertion in model container [2020-10-27 05:53:36,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:53:36" (3/3) ... [2020-10-27 05:53:36,357 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 05:53:36,370 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:53:36,376 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:53:36,391 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:53:36,421 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:53:36,421 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:53:36,421 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:53:36,422 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:53:36,422 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:53:36,422 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:53:36,422 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:53:36,422 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:53:36,445 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states. [2020-10-27 05:53:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:53:36,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:36,459 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] [2020-10-27 05:53:36,459 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:36,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:36,466 INFO L82 PathProgramCache]: Analyzing trace with hash 2126985342, now seen corresponding path program 1 times [2020-10-27 05:53:36,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:36,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672386018] [2020-10-27 05:53:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:36,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:37,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:37,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:37,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:38,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:38,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:41,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:41,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:41,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:53:41,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:53:41,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 05:53:41,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:41,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:53:41,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:53:41,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 05:53:41,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:53:42,509 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:42,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:42,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:42,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:42,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:42,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:42,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 05:53:42,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:42,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:42,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:42,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:53:42,652 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 05:53:42,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672386018] [2020-10-27 05:53:42,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:42,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:53:42,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153932604] [2020-10-27 05:53:42,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:53:42,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:42,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:53:42,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:53:42,701 INFO L87 Difference]: Start difference. First operand 172 states. Second operand 9 states. [2020-10-27 05:53:43,314 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:53:45,082 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 05:53:45,519 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 05:53:45,957 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-27 05:53:46,328 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:53:46,765 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:53:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:46,870 INFO L93 Difference]: Finished difference Result 1019 states and 1628 transitions. [2020-10-27 05:53:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:53:46,872 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-10-27 05:53:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:46,895 INFO L225 Difference]: With dead ends: 1019 [2020-10-27 05:53:46,895 INFO L226 Difference]: Without dead ends: 867 [2020-10-27 05:53:46,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:53:46,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2020-10-27 05:53:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 279. [2020-10-27 05:53:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-27 05:53:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 416 transitions. [2020-10-27 05:53:46,995 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 416 transitions. Word has length 78 [2020-10-27 05:53:46,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:46,996 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 416 transitions. [2020-10-27 05:53:46,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:53:46,996 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 416 transitions. [2020-10-27 05:53:47,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:53:47,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:47,002 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 05:53:47,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:53:47,002 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:47,003 INFO L82 PathProgramCache]: Analyzing trace with hash 937162397, now seen corresponding path program 1 times [2020-10-27 05:53:47,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:47,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885088163] [2020-10-27 05:53:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:47,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:47,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:47,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:47,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:47,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:48,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:50,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:52,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:52,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:53:52,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:53:52,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 05:53:52,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 05:53:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:53:52,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:53:52,429 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:52,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:52,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:52,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:52,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:52,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:52,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:53:52,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:52,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:52,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:52,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:52,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:52,480 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 05:53:52,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885088163] [2020-10-27 05:53:52,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:52,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:53:52,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573856807] [2020-10-27 05:53:52,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:53:52,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:52,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:53:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:53:52,497 INFO L87 Difference]: Start difference. First operand 279 states and 416 transitions. Second operand 4 states. [2020-10-27 05:53:52,864 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:53:54,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:54,111 INFO L93 Difference]: Finished difference Result 709 states and 1100 transitions. [2020-10-27 05:53:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:53:54,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-27 05:53:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:54,119 INFO L225 Difference]: With dead ends: 709 [2020-10-27 05:53:54,120 INFO L226 Difference]: Without dead ends: 478 [2020-10-27 05:53:54,123 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 05:53:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-27 05:53:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 475. [2020-10-27 05:53:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-10-27 05:53:54,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 728 transitions. [2020-10-27 05:53:54,215 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 728 transitions. Word has length 79 [2020-10-27 05:53:54,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:54,216 INFO L481 AbstractCegarLoop]: Abstraction has 475 states and 728 transitions. [2020-10-27 05:53:54,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:53:54,216 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 728 transitions. [2020-10-27 05:53:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:53:54,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:54,225 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 05:53:54,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:53:54,225 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:54,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1670575048, now seen corresponding path program 1 times [2020-10-27 05:53:54,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:54,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108474835] [2020-10-27 05:53:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:54,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:54,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:54,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:54,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:54,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:55,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:58,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:58,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:53:58,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:53:58,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4329 [2020-10-27 05:53:58,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 05:53:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:53:58,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:59,036 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:59,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:59,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:59,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:59,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:59,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:59,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:59,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:53:59,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:59,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:59,112 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 05:53:59,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108474835] [2020-10-27 05:53:59,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:59,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:53:59,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773351754] [2020-10-27 05:53:59,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:53:59,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:59,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:53:59,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:53:59,115 INFO L87 Difference]: Start difference. First operand 475 states and 728 transitions. Second operand 4 states. [2020-10-27 05:53:59,491 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:54:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:00,749 INFO L93 Difference]: Finished difference Result 1265 states and 1984 transitions. [2020-10-27 05:54:00,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:54:00,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-27 05:54:00,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:00,758 INFO L225 Difference]: With dead ends: 1265 [2020-10-27 05:54:00,758 INFO L226 Difference]: Without dead ends: 838 [2020-10-27 05:54:00,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:54:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2020-10-27 05:54:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 835. [2020-10-27 05:54:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 835 states. [2020-10-27 05:54:00,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1298 transitions. [2020-10-27 05:54:00,821 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1298 transitions. Word has length 80 [2020-10-27 05:54:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:00,822 INFO L481 AbstractCegarLoop]: Abstraction has 835 states and 1298 transitions. [2020-10-27 05:54:00,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:54:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1298 transitions. [2020-10-27 05:54:00,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:54:00,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:00,826 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 05:54:00,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:54:00,826 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:00,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:00,827 INFO L82 PathProgramCache]: Analyzing trace with hash 755044734, now seen corresponding path program 1 times [2020-10-27 05:54:00,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:00,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461929024] [2020-10-27 05:54:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:00,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:00,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:00,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:01,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:01,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:02,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:02,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:54:02,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:54:02,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2133 [2020-10-27 05:54:02,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:02,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:02,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 05:54:02,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:54:02,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:03,438 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:03,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:03,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:03,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:03,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:03,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:03,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:54:03,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:03,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:54:03,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:03,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:54:03,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:03,485 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 05:54:03,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461929024] [2020-10-27 05:54:03,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:03,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:54:03,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604289420] [2020-10-27 05:54:03,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:54:03,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:03,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:54:03,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:54:03,488 INFO L87 Difference]: Start difference. First operand 835 states and 1298 transitions. Second operand 4 states. [2020-10-27 05:54:03,847 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:54:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:05,008 INFO L93 Difference]: Finished difference Result 2281 states and 3590 transitions. [2020-10-27 05:54:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:54:05,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-27 05:54:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:05,018 INFO L225 Difference]: With dead ends: 2281 [2020-10-27 05:54:05,019 INFO L226 Difference]: Without dead ends: 1494 [2020-10-27 05:54:05,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:54:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-10-27 05:54:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1491. [2020-10-27 05:54:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1491 states. [2020-10-27 05:54:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 2330 transitions. [2020-10-27 05:54:05,115 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 2330 transitions. Word has length 81 [2020-10-27 05:54:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:05,117 INFO L481 AbstractCegarLoop]: Abstraction has 1491 states and 2330 transitions. [2020-10-27 05:54:05,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:54:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 2330 transitions. [2020-10-27 05:54:05,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:54:05,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:05,124 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 05:54:05,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:54:05,125 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash 684419427, now seen corresponding path program 1 times [2020-10-27 05:54:05,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:05,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494816874] [2020-10-27 05:54:05,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:05,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:05,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:05,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:05,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:06,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:06,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:54:06,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:54:06,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1169 [2020-10-27 05:54:06,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:06,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:06,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 05:54:06,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:54:06,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:06,715 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:06,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:06,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:06,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:06,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:06,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:06,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:54:06,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:06,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:54:06,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:06,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:54:06,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:06,765 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 05:54:06,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494816874] [2020-10-27 05:54:06,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:06,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:54:06,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808687658] [2020-10-27 05:54:06,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:54:06,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:06,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:54:06,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:54:06,768 INFO L87 Difference]: Start difference. First operand 1491 states and 2330 transitions. Second operand 4 states. [2020-10-27 05:54:07,136 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:54:08,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:08,279 INFO L93 Difference]: Finished difference Result 4121 states and 6478 transitions. [2020-10-27 05:54:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:54:08,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-27 05:54:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:08,296 INFO L225 Difference]: With dead ends: 4121 [2020-10-27 05:54:08,296 INFO L226 Difference]: Without dead ends: 2678 [2020-10-27 05:54:08,300 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 05:54:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2020-10-27 05:54:08,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2675. [2020-10-27 05:54:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2675 states. [2020-10-27 05:54:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2675 states to 2675 states and 4178 transitions. [2020-10-27 05:54:08,468 INFO L78 Accepts]: Start accepts. Automaton has 2675 states and 4178 transitions. Word has length 82 [2020-10-27 05:54:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:08,470 INFO L481 AbstractCegarLoop]: Abstraction has 2675 states and 4178 transitions. [2020-10-27 05:54:08,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:54:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2675 states and 4178 transitions. [2020-10-27 05:54:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:54:08,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:08,473 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 05:54:08,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:54:08,473 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:08,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:08,476 INFO L82 PathProgramCache]: Analyzing trace with hash -702883469, now seen corresponding path program 1 times [2020-10-27 05:54:08,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:08,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692670229] [2020-10-27 05:54:08,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:08,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:08,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:08,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:09,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:09,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:54:09,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:54:09,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-27 05:54:09,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 05:54:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:54:09,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:09,661 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:09,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:09,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:09,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:09,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:09,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:09,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:54:09,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:09,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:54:09,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:09,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:54:09,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:09,712 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 05:54:09,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692670229] [2020-10-27 05:54:09,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:09,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:54:09,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140958266] [2020-10-27 05:54:09,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:54:09,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:09,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:54:09,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:54:09,715 INFO L87 Difference]: Start difference. First operand 2675 states and 4178 transitions. Second operand 4 states. [2020-10-27 05:54:10,078 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:54:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:11,341 INFO L93 Difference]: Finished difference Result 7417 states and 11606 transitions. [2020-10-27 05:54:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:54:11,342 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-27 05:54:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:11,370 INFO L225 Difference]: With dead ends: 7417 [2020-10-27 05:54:11,370 INFO L226 Difference]: Without dead ends: 4790 [2020-10-27 05:54:11,379 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 05:54:11,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4790 states. [2020-10-27 05:54:11,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4790 to 4787. [2020-10-27 05:54:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4787 states. [2020-10-27 05:54:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4787 states to 4787 states and 7442 transitions. [2020-10-27 05:54:11,738 INFO L78 Accepts]: Start accepts. Automaton has 4787 states and 7442 transitions. Word has length 83 [2020-10-27 05:54:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:11,739 INFO L481 AbstractCegarLoop]: Abstraction has 4787 states and 7442 transitions. [2020-10-27 05:54:11,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:54:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 4787 states and 7442 transitions. [2020-10-27 05:54:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:54:11,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:11,740 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 05:54:11,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:54:11,741 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:11,742 INFO L82 PathProgramCache]: Analyzing trace with hash -231827550, now seen corresponding path program 1 times [2020-10-27 05:54:11,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:11,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742031700] [2020-10-27 05:54:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:11,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:11,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:12,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:12,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:54:12,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:54:12,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-27 05:54:12,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:12,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:12,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 05:54:12,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:54:12,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:12,492 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:12,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:12,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:12,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:12,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:12,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:12,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:54:12,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:12,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:54:12,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:12,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:54:12,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:12,541 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 05:54:12,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742031700] [2020-10-27 05:54:12,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:12,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:54:12,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190401469] [2020-10-27 05:54:12,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:54:12,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:12,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:54:12,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:54:12,544 INFO L87 Difference]: Start difference. First operand 4787 states and 7442 transitions. Second operand 4 states. [2020-10-27 05:54:12,908 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:54:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:14,220 INFO L93 Difference]: Finished difference Result 13241 states and 20566 transitions. [2020-10-27 05:54:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:54:14,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-27 05:54:14,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:14,268 INFO L225 Difference]: With dead ends: 13241 [2020-10-27 05:54:14,268 INFO L226 Difference]: Without dead ends: 8502 [2020-10-27 05:54:14,281 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 05:54:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8502 states. [2020-10-27 05:54:14,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8502 to 8499. [2020-10-27 05:54:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8499 states. [2020-10-27 05:54:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8499 states to 8499 states and 13106 transitions. [2020-10-27 05:54:14,794 INFO L78 Accepts]: Start accepts. Automaton has 8499 states and 13106 transitions. Word has length 84 [2020-10-27 05:54:14,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:14,795 INFO L481 AbstractCegarLoop]: Abstraction has 8499 states and 13106 transitions. [2020-10-27 05:54:14,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:54:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 8499 states and 13106 transitions. [2020-10-27 05:54:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:54:14,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:14,796 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 05:54:14,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:54:14,797 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:14,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:14,797 INFO L82 PathProgramCache]: Analyzing trace with hash 822277756, now seen corresponding path program 1 times [2020-10-27 05:54:14,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:14,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357422344] [2020-10-27 05:54:14,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:14,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:15,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:15,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:15,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:54:15,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:54:15,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-27 05:54:15,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:15,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:54:15,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:54:15,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:54:15,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:16,162 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:16,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:16,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:16,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:16,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:16,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:16,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:54:16,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:16,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:54:16,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:16,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:54:16,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:16,256 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 05:54:16,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357422344] [2020-10-27 05:54:16,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:16,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:54:16,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942275242] [2020-10-27 05:54:16,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:54:16,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:16,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:54:16,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:54:16,258 INFO L87 Difference]: Start difference. First operand 8499 states and 13106 transitions. Second operand 9 states. [2020-10-27 05:54:17,642 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 05:54:18,037 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 05:54:18,418 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:54:18,851 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-27 05:54:19,234 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:54:19,640 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:54:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:23,554 INFO L93 Difference]: Finished difference Result 51525 states and 78782 transitions. [2020-10-27 05:54:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:54:23,555 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2020-10-27 05:54:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:23,677 INFO L225 Difference]: With dead ends: 51525 [2020-10-27 05:54:23,677 INFO L226 Difference]: Without dead ends: 43074 [2020-10-27 05:54:23,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:54:23,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43074 states. [2020-10-27 05:54:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43074 to 43059. [2020-10-27 05:54:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43059 states. [2020-10-27 05:54:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43059 states to 43059 states and 65586 transitions. [2020-10-27 05:54:26,284 INFO L78 Accepts]: Start accepts. Automaton has 43059 states and 65586 transitions. Word has length 85 [2020-10-27 05:54:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:26,285 INFO L481 AbstractCegarLoop]: Abstraction has 43059 states and 65586 transitions. [2020-10-27 05:54:26,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:54:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 43059 states and 65586 transitions. [2020-10-27 05:54:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 05:54:26,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:26,286 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 05:54:26,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:54:26,286 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:26,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:26,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1630478597, now seen corresponding path program 1 times [2020-10-27 05:54:26,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:26,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489441641] [2020-10-27 05:54:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:26,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:26,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:27,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:27,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 05:54:27,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:54:27,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-27 05:54:27,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:27,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:54:27,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:54:27,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:54:27,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:27,507 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:27,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:27,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:27,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:27,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:27,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:27,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:54:27,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:27,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:27,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:27,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:54:27,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:27,595 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 05:54:27,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489441641] [2020-10-27 05:54:27,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:27,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:54:27,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395238156] [2020-10-27 05:54:27,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:54:27,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:27,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:54:27,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:54:27,598 INFO L87 Difference]: Start difference. First operand 43059 states and 65586 transitions. Second operand 6 states. [2020-10-27 05:54:28,047 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:54:30,261 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 05:54:33,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:33,286 INFO L93 Difference]: Finished difference Result 122873 states and 187318 transitions. [2020-10-27 05:54:33,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:54:33,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-27 05:54:33,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:33,505 INFO L225 Difference]: With dead ends: 122873 [2020-10-27 05:54:33,506 INFO L226 Difference]: Without dead ends: 79862 [2020-10-27 05:54:33,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:54:33,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79862 states. [2020-10-27 05:54:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79862 to 79859. [2020-10-27 05:54:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79859 states. [2020-10-27 05:54:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79859 states to 79859 states and 121074 transitions. [2020-10-27 05:54:38,554 INFO L78 Accepts]: Start accepts. Automaton has 79859 states and 121074 transitions. Word has length 87 [2020-10-27 05:54:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:38,554 INFO L481 AbstractCegarLoop]: Abstraction has 79859 states and 121074 transitions. [2020-10-27 05:54:38,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:54:38,554 INFO L276 IsEmpty]: Start isEmpty. Operand 79859 states and 121074 transitions. [2020-10-27 05:54:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 05:54:38,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:38,556 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 05:54:38,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:54:38,556 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:38,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1127433770, now seen corresponding path program 1 times [2020-10-27 05:54:38,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:38,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079635312] [2020-10-27 05:54:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:38,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:38,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:38,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 05:54:38,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:38,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-27 05:54:38,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:38,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:54:38,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-27 05:54:38,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:54:38,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:39,251 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:39,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:39,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:39,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:39,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:39,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:39,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:54:39,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:39,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:54:39,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:39,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:54:39,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:39,305 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 05:54:39,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079635312] [2020-10-27 05:54:39,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:39,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:54:39,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851026864] [2020-10-27 05:54:39,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:54:39,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:39,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:54:39,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:54:39,307 INFO L87 Difference]: Start difference. First operand 79859 states and 121074 transitions. Second operand 5 states. [2020-10-27 05:54:49,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:49,188 INFO L93 Difference]: Finished difference Result 162486 states and 244916 transitions. [2020-10-27 05:54:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:54:49,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-27 05:54:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:49,721 INFO L225 Difference]: With dead ends: 162486 [2020-10-27 05:54:49,721 INFO L226 Difference]: Without dead ends: 162483 [2020-10-27 05:54:49,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:54:49,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162483 states. [2020-10-27 05:54:56,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162483 to 82675. [2020-10-27 05:54:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82675 states. [2020-10-27 05:54:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82675 states to 82675 states and 123890 transitions. [2020-10-27 05:54:56,301 INFO L78 Accepts]: Start accepts. Automaton has 82675 states and 123890 transitions. Word has length 87 [2020-10-27 05:54:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:56,301 INFO L481 AbstractCegarLoop]: Abstraction has 82675 states and 123890 transitions. [2020-10-27 05:54:56,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:54:56,302 INFO L276 IsEmpty]: Start isEmpty. Operand 82675 states and 123890 transitions. [2020-10-27 05:54:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 05:54:56,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:56,303 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 05:54:56,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:54:56,303 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:56,303 INFO L82 PathProgramCache]: Analyzing trace with hash 888562082, now seen corresponding path program 1 times [2020-10-27 05:54:56,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:56,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825468048] [2020-10-27 05:54:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:56,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:56,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:56,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 05:54:56,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:56,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-27 05:54:56,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:54:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 05:54:56,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 05:54:57,106 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:57,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:57,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:57,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:57,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:57,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:57,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:54:57,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:54:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:54:57,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:57,150 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 05:54:57,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825468048] [2020-10-27 05:54:57,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:57,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:54:57,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688411226] [2020-10-27 05:54:57,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:54:57,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:54:57,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:54:57,153 INFO L87 Difference]: Start difference. First operand 82675 states and 123890 transitions. Second operand 4 states. [2020-10-27 05:54:57,647 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 05:55:04,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:04,649 INFO L93 Difference]: Finished difference Result 186203 states and 278536 transitions. [2020-10-27 05:55:04,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:55:04,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-10-27 05:55:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:05,040 INFO L225 Difference]: With dead ends: 186203 [2020-10-27 05:55:05,040 INFO L226 Difference]: Without dead ends: 103576 [2020-10-27 05:55:05,132 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 05:55:05,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103576 states. [2020-10-27 05:55:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103576 to 103573. [2020-10-27 05:55:12,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103573 states. [2020-10-27 05:55:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103573 states to 103573 states and 154340 transitions. [2020-10-27 05:55:12,348 INFO L78 Accepts]: Start accepts. Automaton has 103573 states and 154340 transitions. Word has length 88 [2020-10-27 05:55:12,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:12,348 INFO L481 AbstractCegarLoop]: Abstraction has 103573 states and 154340 transitions. [2020-10-27 05:55:12,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:55:12,348 INFO L276 IsEmpty]: Start isEmpty. Operand 103573 states and 154340 transitions. [2020-10-27 05:55:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 05:55:12,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:12,390 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] [2020-10-27 05:55:12,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:55:12,391 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:12,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:12,391 INFO L82 PathProgramCache]: Analyzing trace with hash -627726233, now seen corresponding path program 1 times [2020-10-27 05:55:12,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:12,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855938708] [2020-10-27 05:55:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:12,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:12,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:13,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:14,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:14,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 05:55:14,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:55:14,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2077 [2020-10-27 05:55:14,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:14,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:55:14,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:55:14,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 05:55:14,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:15,020 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:55:15,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:15,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:15,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:15,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:15,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:15,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:55:15,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:15,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:15,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:15,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:55:15,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:15,115 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 05:55:15,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855938708] [2020-10-27 05:55:15,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:55:15,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:55:15,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086327221] [2020-10-27 05:55:15,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:55:15,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:15,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:55:15,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:55:15,118 INFO L87 Difference]: Start difference. First operand 103573 states and 154340 transitions. Second operand 11 states. [2020-10-27 05:55:15,508 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-27 05:55:24,289 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 05:55:25,249 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:55:26,698 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:55:54,665 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:56:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:08,148 INFO L93 Difference]: Finished difference Result 753256 states and 1119283 transitions. [2020-10-27 05:56:08,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:56:08,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 117 [2020-10-27 05:56:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:09,652 INFO L225 Difference]: With dead ends: 753256 [2020-10-27 05:56:09,652 INFO L226 Difference]: Without dead ends: 649733 [2020-10-27 05:56:09,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=325, Invalid=1081, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:56:10,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649733 states. [2020-10-27 05:56:28,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649733 to 178821. [2020-10-27 05:56:28,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178821 states. [2020-10-27 05:56:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178821 states to 178821 states and 264212 transitions. [2020-10-27 05:56:29,658 INFO L78 Accepts]: Start accepts. Automaton has 178821 states and 264212 transitions. Word has length 117 [2020-10-27 05:56:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:29,659 INFO L481 AbstractCegarLoop]: Abstraction has 178821 states and 264212 transitions. [2020-10-27 05:56:29,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:56:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 178821 states and 264212 transitions. [2020-10-27 05:56:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 05:56:29,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:29,725 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] [2020-10-27 05:56:29,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:56:29,725 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:29,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:29,726 INFO L82 PathProgramCache]: Analyzing trace with hash -692181328, now seen corresponding path program 1 times [2020-10-27 05:56:29,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:29,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328345410] [2020-10-27 05:56:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:29,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:29,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:30,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:30,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 05:56:30,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:56:30,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-27 05:56:30,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:30,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:56:30,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:56:30,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 05:56:30,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:30,991 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:56:30,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:31,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:31,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:31,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:31,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:31,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:56:31,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:31,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:56:31,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:31,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:56:31,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 05:56:31,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328345410] [2020-10-27 05:56:31,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:31,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:56:31,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624039101] [2020-10-27 05:56:31,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:56:31,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:31,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:56:31,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:56:31,082 INFO L87 Difference]: Start difference. First operand 178821 states and 264212 transitions. Second operand 6 states. [2020-10-27 05:56:31,493 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 05:56:35,764 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 205