/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.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:52:52,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:52:52,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:52:52,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:52:52,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:52:52,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:52:52,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:52:52,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:52:52,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:52:52,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:52:52,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:52:52,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:52:52,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:52:52,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:52:52,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:52:52,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:52:52,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:52:52,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:52:52,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:52:52,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:52:52,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:52:52,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:52:52,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:52:52,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:52:52,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:52:52,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:52:52,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:52:52,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:52:52,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:52:52,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:52:52,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:52:52,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:52:52,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:52:52,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:52:52,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:52:52,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:52:52,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:52:52,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:52:52,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:52:52,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:52:52,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:52:52,961 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 05:52:52,990 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:52:52,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:52:52,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:52:52,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:52:52,992 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:52:52,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:52:52,992 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:52:52,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:52:52,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:52:52,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:52:52,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:52:52,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:52:52,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:52:52,994 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:52:52,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:52:52,994 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:52:52,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:52:52,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:52:52,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:52:52,995 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:52:52,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:52:52,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:52:52,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:52:52,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:52:52,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:52:52,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:52:52,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:52:52,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:52:52,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:52:52,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:52:53,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:52:53,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:52:53,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:52:53,389 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:52:53,390 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:52:53,391 INFO L432 ainManager$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.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 05:52:53,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e046e060b/546272666c1b49dfa41ad4726fc9d7ee/FLAG8023bcec2 [2020-10-27 05:52:54,237 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:52:54,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 05:52:54,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e046e060b/546272666c1b49dfa41ad4726fc9d7ee/FLAG8023bcec2 [2020-10-27 05:52:54,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e046e060b/546272666c1b49dfa41ad4726fc9d7ee [2020-10-27 05:52:54,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:52:54,519 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:52:54,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:52:54,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:52:54,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:52:54,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:52:54" (1/1) ... [2020-10-27 05:52:54,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d63d03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:54, skipping insertion in model container [2020-10-27 05:52:54,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:52:54" (1/1) ... [2020-10-27 05:52:54,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:52:54,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:52:54,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:52:54,936 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:52:55,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:52:55,052 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:52:55,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:55 WrapperNode [2020-10-27 05:52:55,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:52:55,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:52:55,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:52:55,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:52:55,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:55" (1/1) ... [2020-10-27 05:52:55,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:55" (1/1) ... [2020-10-27 05:52:55,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:55" (1/1) ... [2020-10-27 05:52:55,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:55" (1/1) ... [2020-10-27 05:52:55,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:55" (1/1) ... [2020-10-27 05:52:55,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:55" (1/1) ... [2020-10-27 05:52:55,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:55" (1/1) ... [2020-10-27 05:52:55,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:52:55,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:52:55,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:52:55,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:52:55,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:55" (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 05:52:55,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:52:55,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:52:55,224 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:52:55,224 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:52:55,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:52:55,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:52:55,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:52:55,225 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:52:55,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:52:55,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:52:55,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:52:55,225 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:52:55,226 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:52:55,226 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:52:55,226 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:52:55,226 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:52:55,226 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:52:55,226 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:52:55,227 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:52:55,227 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:52:55,227 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:52:55,227 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:52:55,227 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:52:55,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:52:55,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:52:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:52:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:52:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:52:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:52:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:52:56,366 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:52:56,367 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:52:56,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:52:56 BoogieIcfgContainer [2020-10-27 05:52:56,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:52:56,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:52:56,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:52:56,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:52:56,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:52:54" (1/3) ... [2020-10-27 05:52:56,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41dac52f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:52:56, skipping insertion in model container [2020-10-27 05:52:56,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:55" (2/3) ... [2020-10-27 05:52:56,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41dac52f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:52:56, skipping insertion in model container [2020-10-27 05:52:56,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:52:56" (3/3) ... [2020-10-27 05:52:56,382 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 05:52:56,395 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:52:56,401 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:52:56,414 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:52:56,457 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:52:56,457 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:52:56,457 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:52:56,458 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:52:56,458 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:52:56,458 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:52:56,458 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:52:56,458 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:52:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states. [2020-10-27 05:52:56,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:52:56,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:52:56,513 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 05:52:56,513 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:52:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:52:56,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1049231677, now seen corresponding path program 1 times [2020-10-27 05:52:56,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:52:56,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916849147] [2020-10-27 05:52:56,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:52:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:52:57,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:57,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:57,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:57,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:58,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:59,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:01,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:01,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:53:01,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:53:01,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:53:01,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:53:01,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:53:01,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 05:53:01,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:53:02,665 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:02,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:02,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:02,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:02,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:02,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:02,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:53:02,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:02,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:02,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:02,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:02,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:02,762 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 05:53:02,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916849147] [2020-10-27 05:53:02,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:02,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:53:02,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767261137] [2020-10-27 05:53:02,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:53:02,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:02,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:53:02,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:53:02,799 INFO L87 Difference]: Start difference. First operand 167 states. Second operand 9 states. [2020-10-27 05:53:03,371 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:53:05,232 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 05:53:05,695 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 05:53:06,133 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-27 05:53:06,522 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:53:06,932 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:53:07,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:07,038 INFO L93 Difference]: Finished difference Result 979 states and 1564 transitions. [2020-10-27 05:53:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:53:07,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-10-27 05:53:07,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:07,064 INFO L225 Difference]: With dead ends: 979 [2020-10-27 05:53:07,065 INFO L226 Difference]: Without dead ends: 832 [2020-10-27 05:53:07,070 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 05:53:07,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2020-10-27 05:53:07,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 269. [2020-10-27 05:53:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-27 05:53:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 400 transitions. [2020-10-27 05:53:07,166 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 400 transitions. Word has length 78 [2020-10-27 05:53:07,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:07,167 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 400 transitions. [2020-10-27 05:53:07,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:53:07,168 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 400 transitions. [2020-10-27 05:53:07,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:53:07,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:07,173 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 05:53:07,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:53:07,173 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:07,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:07,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1258700286, now seen corresponding path program 1 times [2020-10-27 05:53:07,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:07,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812736970] [2020-10-27 05:53:07,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:07,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:07,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:07,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:07,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:07,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:09,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:12,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:12,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:53:12,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:53:12,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 05:53:12,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:12,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:12,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 05:53:12,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:53:12,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:12,632 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:12,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:12,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:12,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:12,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:12,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:12,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:53:12,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:12,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:53:12,690 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 05:53:12,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812736970] [2020-10-27 05:53:12,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:12,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:53:12,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647054724] [2020-10-27 05:53:12,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:53:12,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:12,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:53:12,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:53:12,706 INFO L87 Difference]: Start difference. First operand 269 states and 400 transitions. Second operand 4 states. [2020-10-27 05:53:13,083 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:53:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:14,201 INFO L93 Difference]: Finished difference Result 679 states and 1052 transitions. [2020-10-27 05:53:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:53:14,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-27 05:53:14,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:14,207 INFO L225 Difference]: With dead ends: 679 [2020-10-27 05:53:14,208 INFO L226 Difference]: Without dead ends: 458 [2020-10-27 05:53:14,210 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 05:53:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-10-27 05:53:14,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 455. [2020-10-27 05:53:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-27 05:53:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 696 transitions. [2020-10-27 05:53:14,252 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 696 transitions. Word has length 79 [2020-10-27 05:53:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:14,253 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 696 transitions. [2020-10-27 05:53:14,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:53:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 696 transitions. [2020-10-27 05:53:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:53:14,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:14,257 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 05:53:14,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:53:14,257 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:14,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:14,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1368284542, now seen corresponding path program 1 times [2020-10-27 05:53:14,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:14,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092669125] [2020-10-27 05:53:14,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:14,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:14,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:14,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:14,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:15,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:16,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:16,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:53:16,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:53:16,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2453 [2020-10-27 05:53:16,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:16,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:16,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 05:53:16,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:53:16,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:17,155 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:17,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:17,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:17,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:17,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:17,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:17,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:53:17,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:17,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:17,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:17,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:17,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:17,213 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 05:53:17,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092669125] [2020-10-27 05:53:17,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:17,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:53:17,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351976358] [2020-10-27 05:53:17,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:53:17,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:17,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:53:17,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:53:17,216 INFO L87 Difference]: Start difference. First operand 455 states and 696 transitions. Second operand 4 states. [2020-10-27 05:53:17,606 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:53:18,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:18,788 INFO L93 Difference]: Finished difference Result 1205 states and 1888 transitions. [2020-10-27 05:53:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:53:18,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-27 05:53:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:18,796 INFO L225 Difference]: With dead ends: 1205 [2020-10-27 05:53:18,796 INFO L226 Difference]: Without dead ends: 798 [2020-10-27 05:53:18,799 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 05:53:18,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2020-10-27 05:53:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 795. [2020-10-27 05:53:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2020-10-27 05:53:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1234 transitions. [2020-10-27 05:53:18,866 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1234 transitions. Word has length 80 [2020-10-27 05:53:18,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:18,866 INFO L481 AbstractCegarLoop]: Abstraction has 795 states and 1234 transitions. [2020-10-27 05:53:18,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:53:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1234 transitions. [2020-10-27 05:53:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:53:18,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:18,869 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 05:53:18,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:53:18,869 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:18,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:18,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1779965335, now seen corresponding path program 1 times [2020-10-27 05:53:18,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:18,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995122367] [2020-10-27 05:53:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:18,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:18,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:19,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:19,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:20,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:20,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:53:20,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:53:20,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1191 [2020-10-27 05:53:20,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 05:53:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:53:20,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:20,517 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:20,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:20,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:20,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:20,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:20,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:20,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:53:20,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:20,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:20,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:20,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:20,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:53:20,574 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 05:53:20,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995122367] [2020-10-27 05:53:20,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:20,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:53:20,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095390693] [2020-10-27 05:53:20,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:53:20,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:20,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:53:20,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:53:20,580 INFO L87 Difference]: Start difference. First operand 795 states and 1234 transitions. Second operand 4 states. [2020-10-27 05:53:20,944 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:53:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:22,109 INFO L93 Difference]: Finished difference Result 2161 states and 3398 transitions. [2020-10-27 05:53:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:53:22,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-27 05:53:22,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:22,122 INFO L225 Difference]: With dead ends: 2161 [2020-10-27 05:53:22,122 INFO L226 Difference]: Without dead ends: 1414 [2020-10-27 05:53:22,128 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 05:53:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2020-10-27 05:53:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1411. [2020-10-27 05:53:22,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1411 states. [2020-10-27 05:53:22,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 2202 transitions. [2020-10-27 05:53:22,255 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 2202 transitions. Word has length 81 [2020-10-27 05:53:22,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:22,258 INFO L481 AbstractCegarLoop]: Abstraction has 1411 states and 2202 transitions. [2020-10-27 05:53:22,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:53:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 2202 transitions. [2020-10-27 05:53:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:53:22,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:22,261 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 05:53:22,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:53:22,263 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:22,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:22,264 INFO L82 PathProgramCache]: Analyzing trace with hash 210617907, now seen corresponding path program 1 times [2020-10-27 05:53:22,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:22,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261814329] [2020-10-27 05:53:22,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:22,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:22,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:22,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:22,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:22,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:53:22,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:53:22,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-27 05:53:22,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:22,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:22,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 05:53:22,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:53:22,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:23,436 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:23,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:23,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:23,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:23,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:23,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:23,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:53:23,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:23,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:23,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:23,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:23,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:23,485 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 05:53:23,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261814329] [2020-10-27 05:53:23,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:23,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:53:23,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404144088] [2020-10-27 05:53:23,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:53:23,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:23,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:53:23,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:53:23,488 INFO L87 Difference]: Start difference. First operand 1411 states and 2202 transitions. Second operand 4 states. [2020-10-27 05:53:23,870 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:53:25,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:25,002 INFO L93 Difference]: Finished difference Result 3881 states and 6094 transitions. [2020-10-27 05:53:25,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:53:25,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-27 05:53:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:25,018 INFO L225 Difference]: With dead ends: 3881 [2020-10-27 05:53:25,019 INFO L226 Difference]: Without dead ends: 2518 [2020-10-27 05:53:25,024 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 05:53:25,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2020-10-27 05:53:25,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 2515. [2020-10-27 05:53:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2515 states. [2020-10-27 05:53:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 3922 transitions. [2020-10-27 05:53:25,179 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 3922 transitions. Word has length 82 [2020-10-27 05:53:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:25,181 INFO L481 AbstractCegarLoop]: Abstraction has 2515 states and 3922 transitions. [2020-10-27 05:53:25,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:53:25,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 3922 transitions. [2020-10-27 05:53:25,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:53:25,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:25,186 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 05:53:25,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:53:25,187 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:25,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1978038296, now seen corresponding path program 1 times [2020-10-27 05:53:25,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:25,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100386529] [2020-10-27 05:53:25,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:25,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:25,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:25,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:25,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:53:25,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:53:25,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-27 05:53:25,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:25,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:25,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 05:53:25,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:53:25,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:26,026 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:26,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:26,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:26,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:26,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:26,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:26,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:53:26,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:26,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:26,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:26,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:26,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:53:26,079 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 05:53:26,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100386529] [2020-10-27 05:53:26,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:26,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:53:26,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139192364] [2020-10-27 05:53:26,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:53:26,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:26,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:53:26,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:53:26,083 INFO L87 Difference]: Start difference. First operand 2515 states and 3922 transitions. Second operand 4 states. [2020-10-27 05:53:26,480 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:53:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:27,696 INFO L93 Difference]: Finished difference Result 6937 states and 10838 transitions. [2020-10-27 05:53:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:53:27,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-27 05:53:27,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:27,723 INFO L225 Difference]: With dead ends: 6937 [2020-10-27 05:53:27,724 INFO L226 Difference]: Without dead ends: 4470 [2020-10-27 05:53:27,731 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 05:53:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4470 states. [2020-10-27 05:53:27,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4470 to 4467. [2020-10-27 05:53:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4467 states. [2020-10-27 05:53:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6930 transitions. [2020-10-27 05:53:28,018 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6930 transitions. Word has length 83 [2020-10-27 05:53:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:28,018 INFO L481 AbstractCegarLoop]: Abstraction has 4467 states and 6930 transitions. [2020-10-27 05:53:28,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:53:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6930 transitions. [2020-10-27 05:53:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:53:28,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:28,020 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 05:53:28,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:53:28,021 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1770630148, now seen corresponding path program 1 times [2020-10-27 05:53:28,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:28,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909194761] [2020-10-27 05:53:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:28,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:29,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:29,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:53:29,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:53:29,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1026 [2020-10-27 05:53:29,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:29,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:53:29,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:53:29,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 05:53:29,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:53:29,615 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:29,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:29,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:29,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:29,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:29,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:29,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:53:29,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:29,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:29,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:29,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:29,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:29,718 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 05:53:29,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909194761] [2020-10-27 05:53:29,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:29,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:53:29,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861983885] [2020-10-27 05:53:29,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:53:29,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:29,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:53:29,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:53:29,721 INFO L87 Difference]: Start difference. First operand 4467 states and 6930 transitions. Second operand 9 states. [2020-10-27 05:53:31,211 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 05:53:31,710 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 05:53:32,118 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:53:32,525 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-27 05:53:32,922 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:53:33,309 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:53:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:35,997 INFO L93 Difference]: Finished difference Result 27301 states and 42142 transitions. [2020-10-27 05:53:35,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:53:35,998 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-27 05:53:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:36,114 INFO L225 Difference]: With dead ends: 27301 [2020-10-27 05:53:36,115 INFO L226 Difference]: Without dead ends: 22882 [2020-10-27 05:53:36,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:53:36,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22882 states. [2020-10-27 05:53:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22882 to 22867. [2020-10-27 05:53:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22867 states. [2020-10-27 05:53:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22867 states to 22867 states and 35186 transitions. [2020-10-27 05:53:38,215 INFO L78 Accepts]: Start accepts. Automaton has 22867 states and 35186 transitions. Word has length 84 [2020-10-27 05:53:38,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:38,218 INFO L481 AbstractCegarLoop]: Abstraction has 22867 states and 35186 transitions. [2020-10-27 05:53:38,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:53:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 22867 states and 35186 transitions. [2020-10-27 05:53:38,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:53:38,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:38,221 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 05:53:38,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:53:38,221 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:38,222 INFO L82 PathProgramCache]: Analyzing trace with hash 625853597, now seen corresponding path program 1 times [2020-10-27 05:53:38,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:38,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207509336] [2020-10-27 05:53:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:38,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:38,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:38,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:38,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:53:38,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:53:38,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-27 05:53:38,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:38,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:38,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 05:53:38,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:53:38,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:39,100 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:39,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:39,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:39,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:39,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:39,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:39,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:53:39,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:39,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:39,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:39,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:39,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:39,163 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 05:53:39,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207509336] [2020-10-27 05:53:39,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:39,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:53:39,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244022114] [2020-10-27 05:53:39,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:53:39,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:39,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:53:39,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:53:39,169 INFO L87 Difference]: Start difference. First operand 22867 states and 35186 transitions. Second operand 4 states. [2020-10-27 05:53:39,652 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:53:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:42,580 INFO L93 Difference]: Finished difference Result 64281 states and 98550 transitions. [2020-10-27 05:53:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:53:42,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-27 05:53:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:42,708 INFO L225 Difference]: With dead ends: 64281 [2020-10-27 05:53:42,709 INFO L226 Difference]: Without dead ends: 41462 [2020-10-27 05:53:42,776 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 05:53:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41462 states. [2020-10-27 05:53:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41462 to 41459. [2020-10-27 05:53:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41459 states. [2020-10-27 05:53:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41459 states to 41459 states and 63026 transitions. [2020-10-27 05:53:45,538 INFO L78 Accepts]: Start accepts. Automaton has 41459 states and 63026 transitions. Word has length 84 [2020-10-27 05:53:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:45,539 INFO L481 AbstractCegarLoop]: Abstraction has 41459 states and 63026 transitions. [2020-10-27 05:53:45,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:53:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 41459 states and 63026 transitions. [2020-10-27 05:53:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:53:45,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:45,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:45,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:53:45,541 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:45,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:45,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1871337587, now seen corresponding path program 1 times [2020-10-27 05:53:45,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:45,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408385876] [2020-10-27 05:53:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:45,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:45,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:46,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:46,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:53:46,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:53:46,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-27 05:53:46,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:46,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:53:46,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:53:46,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:53:46,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:46,670 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:46,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:46,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:46,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:46,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:46,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:46,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 05:53:46,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:53:46,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:46,749 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 05:53:46,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408385876] [2020-10-27 05:53:46,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:46,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:53:46,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399858024] [2020-10-27 05:53:46,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:53:46,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:46,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:53:46,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:53:46,752 INFO L87 Difference]: Start difference. First operand 41459 states and 63026 transitions. Second operand 6 states. [2020-10-27 05:53:47,161 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:53:49,573 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:53:52,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:52,993 INFO L93 Difference]: Finished difference Result 123641 states and 187702 transitions. [2020-10-27 05:53:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:53:52,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-27 05:53:52,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:53,253 INFO L225 Difference]: With dead ends: 123641 [2020-10-27 05:53:53,253 INFO L226 Difference]: Without dead ends: 82230 [2020-10-27 05:53:53,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:53:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82230 states. [2020-10-27 05:53:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82230 to 82227. [2020-10-27 05:53:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82227 states. [2020-10-27 05:53:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82227 states to 82227 states and 124082 transitions. [2020-10-27 05:53:58,591 INFO L78 Accepts]: Start accepts. Automaton has 82227 states and 124082 transitions. Word has length 86 [2020-10-27 05:53:58,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:58,592 INFO L481 AbstractCegarLoop]: Abstraction has 82227 states and 124082 transitions. [2020-10-27 05:53:58,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:53:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 82227 states and 124082 transitions. [2020-10-27 05:53:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:53:58,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:58,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:58,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:53:58,594 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:58,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:58,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1515376686, now seen corresponding path program 1 times [2020-10-27 05:53:58,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:58,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45273208] [2020-10-27 05:53:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:58,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:58,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:58,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:53:58,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:58,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-27 05:53:58,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:58,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:53:58,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 05:53:58,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:53:58,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:59,465 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:59,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:59,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:59,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:59,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:59,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:59,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:53:59,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:59,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:59,505 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 05:53:59,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45273208] [2020-10-27 05:53:59,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:59,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:53:59,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244054273] [2020-10-27 05:53:59,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:53:59,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:59,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:53:59,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:53:59,508 INFO L87 Difference]: Start difference. First operand 82227 states and 124082 transitions. Second operand 5 states. [2020-10-27 05:54:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:09,596 INFO L93 Difference]: Finished difference Result 167478 states and 251188 transitions. [2020-10-27 05:54:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:54:09,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-10-27 05:54:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:10,306 INFO L225 Difference]: With dead ends: 167478 [2020-10-27 05:54:10,306 INFO L226 Difference]: Without dead ends: 167475 [2020-10-27 05:54:10,344 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 05:54:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167475 states. [2020-10-27 05:54:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167475 to 85299. [2020-10-27 05:54:17,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85299 states. [2020-10-27 05:54:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85299 states to 85299 states and 127154 transitions. [2020-10-27 05:54:17,280 INFO L78 Accepts]: Start accepts. Automaton has 85299 states and 127154 transitions. Word has length 86 [2020-10-27 05:54:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:17,281 INFO L481 AbstractCegarLoop]: Abstraction has 85299 states and 127154 transitions. [2020-10-27 05:54:17,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:54:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 85299 states and 127154 transitions. [2020-10-27 05:54:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 05:54:17,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:17,282 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 05:54:17,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:54:17,282 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:17,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:17,283 INFO L82 PathProgramCache]: Analyzing trace with hash 29908260, now seen corresponding path program 1 times [2020-10-27 05:54:17,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:17,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972944016] [2020-10-27 05:54:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:17,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:17,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:17,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 05:54:17,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:17,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-27 05:54:17,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:17,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:17,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:54:17,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 05:54:17,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:17,804 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:17,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:17,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:17,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:17,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:17,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:17,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:54:17,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:17,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:54:17,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:17,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:54:17,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:17,856 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 05:54:17,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972944016] [2020-10-27 05:54:17,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:17,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:54:17,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152991422] [2020-10-27 05:54:17,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:54:17,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:17,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:54:17,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:54:17,859 INFO L87 Difference]: Start difference. First operand 85299 states and 127154 transitions. Second operand 4 states. [2020-10-27 05:54:18,480 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 05:54:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:27,140 INFO L93 Difference]: Finished difference Result 208843 states and 311176 transitions. [2020-10-27 05:54:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:54:27,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-10-27 05:54:27,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:27,398 INFO L225 Difference]: With dead ends: 208843 [2020-10-27 05:54:27,398 INFO L226 Difference]: Without dead ends: 123592 [2020-10-27 05:54:27,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:54:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123592 states. [2020-10-27 05:54:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123592 to 123589. [2020-10-27 05:54:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123589 states. [2020-10-27 05:54:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123589 states to 123589 states and 183364 transitions. [2020-10-27 05:54:36,604 INFO L78 Accepts]: Start accepts. Automaton has 123589 states and 183364 transitions. Word has length 87 [2020-10-27 05:54:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:36,604 INFO L481 AbstractCegarLoop]: Abstraction has 123589 states and 183364 transitions. [2020-10-27 05:54:36,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:54:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 123589 states and 183364 transitions. [2020-10-27 05:54:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 05:54:36,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:36,659 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] [2020-10-27 05:54:36,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:54:36,660 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:36,660 INFO L82 PathProgramCache]: Analyzing trace with hash -593523029, now seen corresponding path program 1 times [2020-10-27 05:54:36,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:36,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665602157] [2020-10-27 05:54:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:36,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:36,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:36,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:39,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:39,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 05:54:39,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:54:39,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2859 [2020-10-27 05:54:39,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:39,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:54:39,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:54:39,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 05:54:39,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:40,385 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:40,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:40,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:40,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:40,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:40,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:40,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:54:40,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:40,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:40,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:40,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:54:40,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:54:40,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665602157] [2020-10-27 05:54:40,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:54:40,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:54:40,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495935776] [2020-10-27 05:54:40,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:54:40,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:40,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:54:40,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:54:40,501 INFO L87 Difference]: Start difference. First operand 123589 states and 183364 transitions. Second operand 11 states. [2020-10-27 05:54:40,957 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-27 05:54:48,908 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:54:49,751 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 05:54:51,003 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:55:20,029 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:55:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:45,977 INFO L93 Difference]: Finished difference Result 888795 states and 1310082 transitions. [2020-10-27 05:55:45,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 05:55:45,978 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 116 [2020-10-27 05:55:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:47,814 INFO L225 Difference]: With dead ends: 888795 [2020-10-27 05:55:47,814 INFO L226 Difference]: Without dead ends: 781176 [2020-10-27 05:55:48,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=452, Invalid=1710, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 05:55:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781176 states.