/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.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:10:28,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:10:28,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:10:28,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:10:28,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:10:28,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:10:28,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:10:28,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:10:28,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:10:28,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:10:28,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:10:28,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:10:28,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:10:28,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:10:28,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:10:28,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:10:28,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:10:28,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:10:28,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:10:28,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:10:28,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:10:28,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:10:28,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:10:28,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:10:28,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:10:28,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:10:28,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:10:28,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:10:28,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:10:28,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:10:28,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:10:28,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:10:28,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:10:28,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:10:28,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:10:28,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:10:29,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:10:29,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:10:29,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:10:29,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:10:29,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:10:29,010 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 05:10:29,063 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:10:29,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:10:29,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:10:29,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:10:29,070 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:10:29,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:10:29,070 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:10:29,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:10:29,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:10:29,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:10:29,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:10:29,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:10:29,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:10:29,071 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:10:29,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:10:29,071 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:10:29,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:10:29,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:10:29,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:10:29,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:10:29,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:10:29,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:10:29,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:10:29,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:10:29,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:10:29,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:10:29,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:10:29,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:10:29,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:10:29,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:10:29,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:10:29,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:10:29,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:10:29,508 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:10:29,508 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:10:29,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:10:29,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82a1058c8/0b5bf431e33e43b8ad5dfc6115559447/FLAG4cb732551 [2020-10-27 05:10:30,333 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:10:30,334 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:10:30,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82a1058c8/0b5bf431e33e43b8ad5dfc6115559447/FLAG4cb732551 [2020-10-27 05:10:30,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82a1058c8/0b5bf431e33e43b8ad5dfc6115559447 [2020-10-27 05:10:30,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:10:30,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:10:30,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:10:30,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:10:30,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:10:30,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:10:30" (1/1) ... [2020-10-27 05:10:30,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79e391dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:30, skipping insertion in model container [2020-10-27 05:10:30,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:10:30" (1/1) ... [2020-10-27 05:10:30,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:10:30,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:10:31,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:10:31,021 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:10:31,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:10:31,125 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:10:31,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:31 WrapperNode [2020-10-27 05:10:31,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:10:31,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:10:31,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:10:31,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:10:31,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:31" (1/1) ... [2020-10-27 05:10:31,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:31" (1/1) ... [2020-10-27 05:10:31,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:31" (1/1) ... [2020-10-27 05:10:31,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:31" (1/1) ... [2020-10-27 05:10:31,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:31" (1/1) ... [2020-10-27 05:10:31,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:31" (1/1) ... [2020-10-27 05:10:31,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:31" (1/1) ... [2020-10-27 05:10:31,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:10:31,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:10:31,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:10:31,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:10:31,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:31" (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 05:10:31,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:10:31,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:10:31,367 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:10:31,368 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:10:31,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:10:31,369 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:10:31,369 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:10:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:10:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:10:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:10:31,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:10:31,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:10:31,372 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:10:31,373 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:10:31,373 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:10:31,374 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:10:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:10:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:10:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:10:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:10:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:10:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:10:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:10:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:10:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:10:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:10:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:10:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:10:32,165 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:10:32,166 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:10:32,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:10:32 BoogieIcfgContainer [2020-10-27 05:10:32,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:10:32,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:10:32,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:10:32,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:10:32,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:10:30" (1/3) ... [2020-10-27 05:10:32,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cfa299d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:10:32, skipping insertion in model container [2020-10-27 05:10:32,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:10:31" (2/3) ... [2020-10-27 05:10:32,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cfa299d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:10:32, skipping insertion in model container [2020-10-27 05:10:32,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:10:32" (3/3) ... [2020-10-27 05:10:32,178 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:10:32,192 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:10:32,197 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:10:32,210 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:10:32,236 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:10:32,236 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:10:32,237 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:10:32,237 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:10:32,237 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:10:32,237 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:10:32,237 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:10:32,237 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:10:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-10-27 05:10:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 05:10:32,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:32,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:10:32,267 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:32,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:32,275 INFO L82 PathProgramCache]: Analyzing trace with hash 238077610, now seen corresponding path program 1 times [2020-10-27 05:10:32,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:32,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812469518] [2020-10-27 05:10:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:32,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:32,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:33,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:34,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:34,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 05:10:34,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:10:34,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1796 [2020-10-27 05:10:34,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:34,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:10:34,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:10:34,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 05:10:34,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:10:34,760 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:10:34,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:34,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:34,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:34,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:34,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:34,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:10:34,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:34,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:10:34,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:34,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:10:34,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:34,811 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 05:10:34,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812469518] [2020-10-27 05:10:34,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:34,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:10:34,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495943052] [2020-10-27 05:10:34,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:10:34,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:34,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:10:34,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:10:34,842 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 6 states. [2020-10-27 05:10:35,104 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 05:10:35,955 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 05:10:36,161 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 05:10:36,396 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 05:10:36,577 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:10:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:36,669 INFO L93 Difference]: Finished difference Result 347 states and 540 transitions. [2020-10-27 05:10:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:10:36,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-27 05:10:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:36,687 INFO L225 Difference]: With dead ends: 347 [2020-10-27 05:10:36,688 INFO L226 Difference]: Without dead ends: 281 [2020-10-27 05:10:36,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:10:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-27 05:10:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 106. [2020-10-27 05:10:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 05:10:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 153 transitions. [2020-10-27 05:10:36,774 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 153 transitions. Word has length 42 [2020-10-27 05:10:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:36,775 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 153 transitions. [2020-10-27 05:10:36,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:10:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 153 transitions. [2020-10-27 05:10:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 05:10:36,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:36,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:10:36,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:10:36,779 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:36,779 INFO L82 PathProgramCache]: Analyzing trace with hash -533542023, now seen corresponding path program 1 times [2020-10-27 05:10:36,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:36,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017252610] [2020-10-27 05:10:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:36,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:36,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:36,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:37,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:37,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:39,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:39,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 05:10:39,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:10:39,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2945 [2020-10-27 05:10:39,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:39,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:10:39,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:10:39,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 05:10:39,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-27 05:10:40,096 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:10:40,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:40,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:40,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:40,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:40,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:40,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:10:40,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:40,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:40,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:40,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:10:40,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:40,158 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 05:10:40,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017252610] [2020-10-27 05:10:40,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:40,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:10:40,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081598488] [2020-10-27 05:10:40,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:10:40,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:40,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:10:40,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:10:40,164 INFO L87 Difference]: Start difference. First operand 106 states and 153 transitions. Second operand 7 states. [2020-10-27 05:10:40,343 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:10:40,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:40,927 INFO L93 Difference]: Finished difference Result 303 states and 460 transitions. [2020-10-27 05:10:40,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:10:40,927 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-27 05:10:40,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:40,933 INFO L225 Difference]: With dead ends: 303 [2020-10-27 05:10:40,934 INFO L226 Difference]: Without dead ends: 220 [2020-10-27 05:10:40,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:10:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-27 05:10:40,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 145. [2020-10-27 05:10:40,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 05:10:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 213 transitions. [2020-10-27 05:10:40,988 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 213 transitions. Word has length 44 [2020-10-27 05:10:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:40,989 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 213 transitions. [2020-10-27 05:10:40,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:10:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 213 transitions. [2020-10-27 05:10:40,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 05:10:40,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:40,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:10:40,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:10:40,991 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:40,992 INFO L82 PathProgramCache]: Analyzing trace with hash -763454641, now seen corresponding path program 1 times [2020-10-27 05:10:40,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:40,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207390705] [2020-10-27 05:10:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:41,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:41,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:41,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:41,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:41,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:41,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:41,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 05:10:41,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:10:41,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 752 [2020-10-27 05:10:41,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:41,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:41,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:10:41,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:10:41,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:41,951 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:10:41,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:41,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:41,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:41,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:41,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:41,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:10:41,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:41,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:10:41,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:41,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:10:41,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:41,984 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 05:10:41,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207390705] [2020-10-27 05:10:41,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:41,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:10:41,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454180925] [2020-10-27 05:10:41,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:10:41,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:41,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:10:41,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:10:41,990 INFO L87 Difference]: Start difference. First operand 145 states and 213 transitions. Second operand 4 states. [2020-10-27 05:10:42,165 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 05:10:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:42,427 INFO L93 Difference]: Finished difference Result 349 states and 528 transitions. [2020-10-27 05:10:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:10:42,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-27 05:10:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:42,430 INFO L225 Difference]: With dead ends: 349 [2020-10-27 05:10:42,430 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 05:10:42,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:10:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 05:10:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2020-10-27 05:10:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 05:10:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 339 transitions. [2020-10-27 05:10:42,473 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 339 transitions. Word has length 44 [2020-10-27 05:10:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:42,473 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 339 transitions. [2020-10-27 05:10:42,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:10:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 339 transitions. [2020-10-27 05:10:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 05:10:42,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:42,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:10:42,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:10:42,481 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:42,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:42,484 INFO L82 PathProgramCache]: Analyzing trace with hash -141925008, now seen corresponding path program 1 times [2020-10-27 05:10:42,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:42,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625928095] [2020-10-27 05:10:42,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:42,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:42,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:42,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:43,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:43,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 05:10:43,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:10:43,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 664 [2020-10-27 05:10:43,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:43,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:10:43,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:10:43,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 05:10:43,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:43,426 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:10:43,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:43,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:43,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:43,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:43,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:43,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:10:43,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:43,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:10:43,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:43,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:10:43,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:43,462 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 05:10:43,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625928095] [2020-10-27 05:10:43,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:43,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:10:43,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791695427] [2020-10-27 05:10:43,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:10:43,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:43,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:10:43,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:10:43,465 INFO L87 Difference]: Start difference. First operand 229 states and 339 transitions. Second operand 6 states. [2020-10-27 05:10:43,690 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 05:10:44,118 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:10:44,359 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 05:10:44,518 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 05:10:44,776 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 05:10:44,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:44,795 INFO L93 Difference]: Finished difference Result 625 states and 944 transitions. [2020-10-27 05:10:44,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:10:44,795 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-27 05:10:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:44,801 INFO L225 Difference]: With dead ends: 625 [2020-10-27 05:10:44,802 INFO L226 Difference]: Without dead ends: 475 [2020-10-27 05:10:44,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:10:44,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-27 05:10:44,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 229. [2020-10-27 05:10:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 05:10:44,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2020-10-27 05:10:44,851 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 44 [2020-10-27 05:10:44,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:44,851 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2020-10-27 05:10:44,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:10:44,851 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2020-10-27 05:10:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 05:10:44,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:44,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:10:44,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:10:44,856 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:44,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:44,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1269643905, now seen corresponding path program 1 times [2020-10-27 05:10:44,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:44,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322824452] [2020-10-27 05:10:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:44,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:44,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:44,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:45,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:45,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:46,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:46,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 05:10:46,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:10:46,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2094 [2020-10-27 05:10:46,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:46,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:10:46,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:10:46,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:10:46,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:47,233 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:10:47,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:47,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:47,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:47,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:47,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:47,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:10:47,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:47,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:47,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:47,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:10:47,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:47,289 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 05:10:47,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322824452] [2020-10-27 05:10:47,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:47,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:10:47,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780756031] [2020-10-27 05:10:47,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:10:47,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:47,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:10:47,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:10:47,291 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand 7 states. [2020-10-27 05:10:47,477 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:10:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:47,960 INFO L93 Difference]: Finished difference Result 551 states and 823 transitions. [2020-10-27 05:10:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:10:47,960 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-27 05:10:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:47,964 INFO L225 Difference]: With dead ends: 551 [2020-10-27 05:10:47,964 INFO L226 Difference]: Without dead ends: 379 [2020-10-27 05:10:47,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:10:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-27 05:10:47,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 219. [2020-10-27 05:10:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-27 05:10:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 317 transitions. [2020-10-27 05:10:48,001 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 317 transitions. Word has length 44 [2020-10-27 05:10:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:48,001 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 317 transitions. [2020-10-27 05:10:48,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:10:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 317 transitions. [2020-10-27 05:10:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 05:10:48,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:48,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:10:48,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:10:48,007 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:48,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:48,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1910575989, now seen corresponding path program 1 times [2020-10-27 05:10:48,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:48,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379735858] [2020-10-27 05:10:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:48,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:48,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:48,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:48,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:48,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:48,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:49,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:49,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 05:10:49,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:10:49,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1641 [2020-10-27 05:10:49,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:49,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:10:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:10:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:10:49,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:49,896 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:10:49,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:49,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:49,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:49,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:49,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:49,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:10:49,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:49,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:10:49,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:49,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:10:49,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:49,925 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 05:10:49,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379735858] [2020-10-27 05:10:49,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:49,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:10:49,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427784510] [2020-10-27 05:10:49,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:10:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:10:49,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:10:49,928 INFO L87 Difference]: Start difference. First operand 219 states and 317 transitions. Second operand 5 states. [2020-10-27 05:10:50,123 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:10:50,586 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:10:50,765 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 05:10:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:50,919 INFO L93 Difference]: Finished difference Result 387 states and 574 transitions. [2020-10-27 05:10:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:10:50,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-27 05:10:50,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:50,925 INFO L225 Difference]: With dead ends: 387 [2020-10-27 05:10:50,925 INFO L226 Difference]: Without dead ends: 304 [2020-10-27 05:10:50,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:10:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-27 05:10:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 296. [2020-10-27 05:10:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-27 05:10:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 434 transitions. [2020-10-27 05:10:50,967 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 434 transitions. Word has length 45 [2020-10-27 05:10:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:50,967 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 434 transitions. [2020-10-27 05:10:50,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:10:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 434 transitions. [2020-10-27 05:10:50,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 05:10:50,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:50,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:10:50,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:10:50,968 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:50,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:50,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1553981397, now seen corresponding path program 1 times [2020-10-27 05:10:50,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:50,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102999400] [2020-10-27 05:10:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:50,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:51,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:51,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:51,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:51,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:51,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:55,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:55,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 05:10:55,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:10:55,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:10:55,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:55,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:10:55,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:10:55,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 05:10:55,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:56,262 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:10:56,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:56,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:56,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:56,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:56,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:56,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:10:56,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:56,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:56,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:56,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:10:56,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:56,316 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 05:10:56,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102999400] [2020-10-27 05:10:56,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:56,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:10:56,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354779738] [2020-10-27 05:10:56,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:10:56,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:56,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:10:56,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:10:56,320 INFO L87 Difference]: Start difference. First operand 296 states and 434 transitions. Second operand 7 states. [2020-10-27 05:10:56,505 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 05:10:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:57,025 INFO L93 Difference]: Finished difference Result 604 states and 908 transitions. [2020-10-27 05:10:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:10:57,025 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-27 05:10:57,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:57,029 INFO L225 Difference]: With dead ends: 604 [2020-10-27 05:10:57,029 INFO L226 Difference]: Without dead ends: 442 [2020-10-27 05:10:57,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:10:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-10-27 05:10:57,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 284. [2020-10-27 05:10:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-27 05:10:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 417 transitions. [2020-10-27 05:10:57,075 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 417 transitions. Word has length 45 [2020-10-27 05:10:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:57,075 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 417 transitions. [2020-10-27 05:10:57,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:10:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 417 transitions. [2020-10-27 05:10:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 05:10:57,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:57,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:10:57,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:10:57,077 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:57,077 INFO L82 PathProgramCache]: Analyzing trace with hash -164011386, now seen corresponding path program 1 times [2020-10-27 05:10:57,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:57,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977275688] [2020-10-27 05:10:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:57,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:57,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:57,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:57,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:57,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 05:10:57,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:10:57,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-27 05:10:57,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:57,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 05:10:57,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 05:10:57,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:57,743 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:10:57,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:57,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:57,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:57,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:57,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:57,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:10:57,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:57,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:10:57,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:57,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:10:57,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:57,770 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 05:10:57,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977275688] [2020-10-27 05:10:57,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:57,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:10:57,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979642899] [2020-10-27 05:10:57,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:10:57,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:57,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:10:57,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:10:57,773 INFO L87 Difference]: Start difference. First operand 284 states and 417 transitions. Second operand 4 states. [2020-10-27 05:10:57,936 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 05:10:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:58,315 INFO L93 Difference]: Finished difference Result 696 states and 1041 transitions. [2020-10-27 05:10:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:10:58,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-27 05:10:58,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:58,320 INFO L225 Difference]: With dead ends: 696 [2020-10-27 05:10:58,320 INFO L226 Difference]: Without dead ends: 459 [2020-10-27 05:10:58,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:10:58,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-27 05:10:58,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 456. [2020-10-27 05:10:58,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-27 05:10:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 672 transitions. [2020-10-27 05:10:58,393 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 672 transitions. Word has length 45 [2020-10-27 05:10:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:58,394 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 672 transitions. [2020-10-27 05:10:58,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:10:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 672 transitions. [2020-10-27 05:10:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 05:10:58,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:58,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:10:58,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:10:58,395 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:58,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2004229664, now seen corresponding path program 1 times [2020-10-27 05:10:58,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:58,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460844043] [2020-10-27 05:10:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:58,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:58,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:58,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:59,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:59,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 05:10:59,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:10:59,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-10-27 05:10:59,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:59,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:10:59,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:10:59,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 05:10:59,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:59,338 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:10:59,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:59,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:59,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:59,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:59,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:59,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:10:59,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:59,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:59,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:59,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:10:59,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:59,391 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 05:10:59,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460844043] [2020-10-27 05:10:59,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:10:59,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:10:59,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067614841] [2020-10-27 05:10:59,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:10:59,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:59,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:10:59,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:10:59,394 INFO L87 Difference]: Start difference. First operand 456 states and 672 transitions. Second operand 6 states. [2020-10-27 05:10:59,624 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 05:10:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:59,968 INFO L93 Difference]: Finished difference Result 869 states and 1292 transitions. [2020-10-27 05:10:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:10:59,969 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-27 05:10:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:59,972 INFO L225 Difference]: With dead ends: 869 [2020-10-27 05:10:59,972 INFO L226 Difference]: Without dead ends: 456 [2020-10-27 05:10:59,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:10:59,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-27 05:11:00,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2020-10-27 05:11:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-27 05:11:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 664 transitions. [2020-10-27 05:11:00,046 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 664 transitions. Word has length 46 [2020-10-27 05:11:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:00,046 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 664 transitions. [2020-10-27 05:11:00,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:11:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 664 transitions. [2020-10-27 05:11:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 05:11:00,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:00,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:11:00,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:11:00,048 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:00,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:00,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1425205243, now seen corresponding path program 1 times [2020-10-27 05:11:00,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:00,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417517506] [2020-10-27 05:11:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:00,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:00,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:00,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:00,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 05:11:00,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:11:00,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-27 05:11:00,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 05:11:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 05:11:00,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:00,458 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:11:00,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:00,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:00,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:00,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:00,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:00,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:11:00,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:00,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:11:00,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:00,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:11:00,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:00,497 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 05:11:00,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417517506] [2020-10-27 05:11:00,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:00,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:11:00,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512899802] [2020-10-27 05:11:00,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:11:00,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:00,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:11:00,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:11:00,501 INFO L87 Difference]: Start difference. First operand 456 states and 664 transitions. Second operand 4 states. [2020-10-27 05:11:00,682 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 05:11:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:01,067 INFO L93 Difference]: Finished difference Result 1166 states and 1712 transitions. [2020-10-27 05:11:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:11:01,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-27 05:11:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:01,073 INFO L225 Difference]: With dead ends: 1166 [2020-10-27 05:11:01,073 INFO L226 Difference]: Without dead ends: 761 [2020-10-27 05:11:01,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:11:01,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2020-10-27 05:11:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 737. [2020-10-27 05:11:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2020-10-27 05:11:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1067 transitions. [2020-10-27 05:11:01,184 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1067 transitions. Word has length 46 [2020-10-27 05:11:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:01,185 INFO L481 AbstractCegarLoop]: Abstraction has 737 states and 1067 transitions. [2020-10-27 05:11:01,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:11:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1067 transitions. [2020-10-27 05:11:01,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 05:11:01,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:01,186 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] [2020-10-27 05:11:01,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:11:01,186 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:01,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:01,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1562756634, now seen corresponding path program 1 times [2020-10-27 05:11:01,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:01,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106510812] [2020-10-27 05:11:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:01,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:01,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:01,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:01,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 05:11:01,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:11:01,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-27 05:11:01,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:01,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:11:01,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:01,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 05:11:01,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:01,728 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:11:01,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:01,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:01,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:01,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:01,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:01,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:11:01,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:01,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:01,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:01,787 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 05:11:01,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106510812] [2020-10-27 05:11:01,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:01,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:11:01,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270563588] [2020-10-27 05:11:01,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:11:01,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:01,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:11:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:11:01,789 INFO L87 Difference]: Start difference. First operand 737 states and 1067 transitions. Second operand 6 states. [2020-10-27 05:11:01,972 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:11:02,383 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:11:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:02,567 INFO L93 Difference]: Finished difference Result 2139 states and 3111 transitions. [2020-10-27 05:11:02,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:11:02,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-27 05:11:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:02,577 INFO L225 Difference]: With dead ends: 2139 [2020-10-27 05:11:02,577 INFO L226 Difference]: Without dead ends: 1432 [2020-10-27 05:11:02,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:11:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2020-10-27 05:11:02,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1429. [2020-10-27 05:11:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1429 states. [2020-10-27 05:11:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 2063 transitions. [2020-10-27 05:11:02,788 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 2063 transitions. Word has length 47 [2020-10-27 05:11:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:02,788 INFO L481 AbstractCegarLoop]: Abstraction has 1429 states and 2063 transitions. [2020-10-27 05:11:02,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:11:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 2063 transitions. [2020-10-27 05:11:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 05:11:02,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:02,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:11:02,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:11:02,790 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:02,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:02,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1960347009, now seen corresponding path program 1 times [2020-10-27 05:11:02,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:02,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062501769] [2020-10-27 05:11:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:02,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:02,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:02,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 05:11:02,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:02,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-27 05:11:02,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:02,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:11:02,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 05:11:02,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:11:02,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:03,146 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:11:03,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:03,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:03,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:03,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:03,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:03,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:11:03,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:03,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:11:03,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:03,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:11:03,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:11:03,178 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 05:11:03,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062501769] [2020-10-27 05:11:03,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:03,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:11:03,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232281806] [2020-10-27 05:11:03,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:11:03,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:03,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:11:03,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:11:03,181 INFO L87 Difference]: Start difference. First operand 1429 states and 2063 transitions. Second operand 5 states. [2020-10-27 05:11:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:03,839 INFO L93 Difference]: Finished difference Result 2242 states and 3223 transitions. [2020-10-27 05:11:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:11:03,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-27 05:11:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:03,852 INFO L225 Difference]: With dead ends: 2242 [2020-10-27 05:11:03,852 INFO L226 Difference]: Without dead ends: 2239 [2020-10-27 05:11:03,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:11:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2020-10-27 05:11:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 1461. [2020-10-27 05:11:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1461 states. [2020-10-27 05:11:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 2079 transitions. [2020-10-27 05:11:04,068 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 2079 transitions. Word has length 47 [2020-10-27 05:11:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:04,069 INFO L481 AbstractCegarLoop]: Abstraction has 1461 states and 2079 transitions. [2020-10-27 05:11:04,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:11:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 2079 transitions. [2020-10-27 05:11:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:11:04,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:04,071 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] [2020-10-27 05:11:04,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:11:04,071 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:04,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:04,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1407598571, now seen corresponding path program 1 times [2020-10-27 05:11:04,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:04,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004125453] [2020-10-27 05:11:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:04,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:04,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:04,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:04,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:04,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:05,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:05,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:09,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:09,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:11:09,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:11:09,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:11:09,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:09,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:11:09,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:09,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:11:09,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:09,451 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:11:09,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:09,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:09,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:09,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:09,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:09,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:11:09,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:09,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:09,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:09,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:09,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:11:09,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004125453] [2020-10-27 05:11:09,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:11:09,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:11:09,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734428445] [2020-10-27 05:11:09,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:11:09,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:09,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:11:09,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:11:09,516 INFO L87 Difference]: Start difference. First operand 1461 states and 2079 transitions. Second operand 11 states. [2020-10-27 05:11:09,793 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:11:11,732 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 05:11:11,961 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:11:12,225 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:11:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:13,571 INFO L93 Difference]: Finished difference Result 10365 states and 14540 transitions. [2020-10-27 05:11:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:11:13,572 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-10-27 05:11:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:13,616 INFO L225 Difference]: With dead ends: 10365 [2020-10-27 05:11:13,616 INFO L226 Difference]: Without dead ends: 8934 [2020-10-27 05:11:13,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 05:11:13,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8934 states. [2020-10-27 05:11:14,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8934 to 3439. [2020-10-27 05:11:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3439 states. [2020-10-27 05:11:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 4761 transitions. [2020-10-27 05:11:14,184 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 4761 transitions. Word has length 66 [2020-10-27 05:11:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:14,184 INFO L481 AbstractCegarLoop]: Abstraction has 3439 states and 4761 transitions. [2020-10-27 05:11:14,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:11:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 4761 transitions. [2020-10-27 05:11:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:11:14,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:14,187 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] [2020-10-27 05:11:14,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:11:14,188 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:14,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:14,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2143700453, now seen corresponding path program 1 times [2020-10-27 05:11:14,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:14,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846289472] [2020-10-27 05:11:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:14,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:14,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:14,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:14,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:14,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:15,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:15,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:15,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:16,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:16,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:16,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:17,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:17,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:18,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:19,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:11:19,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:11:19,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:11:19,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:19,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:11:19,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:19,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:11:19,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:19,616 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:11:19,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:19,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:19,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:19,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:19,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:11:19,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:19,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:19,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:19,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:19,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:11:19,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846289472] [2020-10-27 05:11:19,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:11:19,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:11:19,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604885508] [2020-10-27 05:11:19,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:11:19,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:19,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:11:19,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:11:19,680 INFO L87 Difference]: Start difference. First operand 3439 states and 4761 transitions. Second operand 11 states. [2020-10-27 05:11:19,899 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 05:11:21,488 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:11:21,682 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:11:21,844 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 05:11:24,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:24,053 INFO L93 Difference]: Finished difference Result 19885 states and 27192 transitions. [2020-10-27 05:11:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:11:24,053 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-10-27 05:11:24,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:24,121 INFO L225 Difference]: With dead ends: 19885 [2020-10-27 05:11:24,122 INFO L226 Difference]: Without dead ends: 16476 [2020-10-27 05:11:24,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:11:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16476 states. [2020-10-27 05:11:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16476 to 8447. [2020-10-27 05:11:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8447 states. [2020-10-27 05:11:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8447 states to 8447 states and 11641 transitions. [2020-10-27 05:11:25,756 INFO L78 Accepts]: Start accepts. Automaton has 8447 states and 11641 transitions. Word has length 66 [2020-10-27 05:11:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:25,757 INFO L481 AbstractCegarLoop]: Abstraction has 8447 states and 11641 transitions. [2020-10-27 05:11:25,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:11:25,757 INFO L276 IsEmpty]: Start isEmpty. Operand 8447 states and 11641 transitions. [2020-10-27 05:11:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:11:25,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:25,761 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:11:25,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:11:25,761 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:25,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:25,762 INFO L82 PathProgramCache]: Analyzing trace with hash -114362437, now seen corresponding path program 1 times [2020-10-27 05:11:25,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:25,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196682275] [2020-10-27 05:11:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:25,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:25,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:26,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:26,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:27,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:28,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:11:28,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:11:28,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2216 [2020-10-27 05:11:28,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:28,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:11:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:11:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:11:28,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:28,514 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:11:28,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:28,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:28,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:28,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:28,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:11:28,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:28,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:11:28,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:28,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:11:28,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:11:28,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196682275] [2020-10-27 05:11:28,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:11:28,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:11:28,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612808483] [2020-10-27 05:11:28,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:11:28,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:28,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:11:28,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:11:28,579 INFO L87 Difference]: Start difference. First operand 8447 states and 11641 transitions. Second operand 10 states. [2020-10-27 05:11:28,862 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:11:30,750 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:11:31,040 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 05:11:31,221 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 05:11:33,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:33,748 INFO L93 Difference]: Finished difference Result 24925 states and 34128 transitions. [2020-10-27 05:11:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:11:33,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-27 05:11:33,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:33,783 INFO L225 Difference]: With dead ends: 24925 [2020-10-27 05:11:33,783 INFO L226 Difference]: Without dead ends: 16508 [2020-10-27 05:11:33,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:11:33,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16508 states. [2020-10-27 05:11:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16508 to 8591. [2020-10-27 05:11:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8591 states. [2020-10-27 05:11:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 11857 transitions. [2020-10-27 05:11:35,150 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 11857 transitions. Word has length 67 [2020-10-27 05:11:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:35,150 INFO L481 AbstractCegarLoop]: Abstraction has 8591 states and 11857 transitions. [2020-10-27 05:11:35,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:11:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 11857 transitions. [2020-10-27 05:11:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:11:35,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:35,155 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] [2020-10-27 05:11:35,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:11:35,155 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash 524240129, now seen corresponding path program 1 times [2020-10-27 05:11:35,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:35,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848180927] [2020-10-27 05:11:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:35,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:35,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:35,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:35,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:37,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:37,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:11:37,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:11:37,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2152 [2020-10-27 05:11:37,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:11:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:11:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:11:37,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:37,689 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:11:37,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:37,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:37,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:37,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:37,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:37,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:11:37,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:37,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:11:37,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:37,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:11:37,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:11:37,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848180927] [2020-10-27 05:11:37,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:11:37,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:11:37,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515564621] [2020-10-27 05:11:37,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:11:37,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:37,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:11:37,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:11:37,725 INFO L87 Difference]: Start difference. First operand 8591 states and 11857 transitions. Second operand 10 states. [2020-10-27 05:11:37,941 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:11:40,067 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:11:40,344 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 05:11:43,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:43,691 INFO L93 Difference]: Finished difference Result 30245 states and 41792 transitions. [2020-10-27 05:11:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:11:43,691 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-27 05:11:43,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:43,732 INFO L225 Difference]: With dead ends: 30245 [2020-10-27 05:11:43,732 INFO L226 Difference]: Without dead ends: 21684 [2020-10-27 05:11:43,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:11:43,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21684 states. [2020-10-27 05:11:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21684 to 8791. [2020-10-27 05:11:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8791 states. [2020-10-27 05:11:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8791 states to 8791 states and 12157 transitions. [2020-10-27 05:11:45,394 INFO L78 Accepts]: Start accepts. Automaton has 8791 states and 12157 transitions. Word has length 67 [2020-10-27 05:11:45,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:45,395 INFO L481 AbstractCegarLoop]: Abstraction has 8791 states and 12157 transitions. [2020-10-27 05:11:45,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:11:45,395 INFO L276 IsEmpty]: Start isEmpty. Operand 8791 states and 12157 transitions. [2020-10-27 05:11:45,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:11:45,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:45,399 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:11:45,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:11:45,400 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:45,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:45,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1959854619, now seen corresponding path program 1 times [2020-10-27 05:11:45,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:45,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361271765] [2020-10-27 05:11:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:45,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:46,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:46,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:47,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:47,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:50,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:50,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:11:50,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:11:50,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:11:50,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:50,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:11:50,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:50,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:11:50,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:50,744 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:11:50,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:50,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:50,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:50,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:50,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:50,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:11:50,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:50,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:50,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:50,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:50,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:11:50,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361271765] [2020-10-27 05:11:50,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:11:50,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 05:11:50,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227390106] [2020-10-27 05:11:50,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:11:50,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:50,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:11:50,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:11:50,798 INFO L87 Difference]: Start difference. First operand 8791 states and 12157 transitions. Second operand 12 states. [2020-10-27 05:11:51,045 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 05:11:53,786 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 05:11:54,023 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 05:11:54,237 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:11:54,493 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:11:55,689 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2020-10-27 05:11:59,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:59,230 INFO L93 Difference]: Finished difference Result 30063 states and 41283 transitions. [2020-10-27 05:11:59,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-27 05:11:59,231 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-27 05:11:59,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:59,275 INFO L225 Difference]: With dead ends: 30063 [2020-10-27 05:11:59,275 INFO L226 Difference]: Without dead ends: 21290 [2020-10-27 05:11:59,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=864, Invalid=3692, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 05:11:59,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21290 states. [2020-10-27 05:12:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21290 to 9649. [2020-10-27 05:12:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9649 states. [2020-10-27 05:12:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9649 states to 9649 states and 13273 transitions. [2020-10-27 05:12:01,510 INFO L78 Accepts]: Start accepts. Automaton has 9649 states and 13273 transitions. Word has length 68 [2020-10-27 05:12:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:01,510 INFO L481 AbstractCegarLoop]: Abstraction has 9649 states and 13273 transitions. [2020-10-27 05:12:01,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:12:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9649 states and 13273 transitions. [2020-10-27 05:12:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:12:01,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:01,514 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] [2020-10-27 05:12:01,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:12:01,514 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:01,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:01,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2049148891, now seen corresponding path program 1 times [2020-10-27 05:12:01,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:01,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105299898] [2020-10-27 05:12:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:01,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:02,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:02,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:06,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:12:06,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:12:06,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:12:06,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:06,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:12:06,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:06,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:12:06,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:06,911 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:12:06,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:06,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:06,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:06,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:06,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:12:06,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:06,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:06,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:06,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:06,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:06,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105299898] [2020-10-27 05:12:06,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:12:06,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 05:12:06,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820068306] [2020-10-27 05:12:06,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:12:06,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:06,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:12:06,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:12:06,991 INFO L87 Difference]: Start difference. First operand 9649 states and 13273 transitions. Second operand 8 states. [2020-10-27 05:12:07,180 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:12:08,339 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:12:08,543 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 05:12:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:11,121 INFO L93 Difference]: Finished difference Result 24255 states and 33408 transitions. [2020-10-27 05:12:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:12:11,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-27 05:12:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:11,151 INFO L225 Difference]: With dead ends: 24255 [2020-10-27 05:12:11,152 INFO L226 Difference]: Without dead ends: 16082 [2020-10-27 05:12:11,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:12:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16082 states. [2020-10-27 05:12:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16082 to 8969. [2020-10-27 05:12:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8969 states. [2020-10-27 05:12:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 12165 transitions. [2020-10-27 05:12:13,009 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 12165 transitions. Word has length 68 [2020-10-27 05:12:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:13,010 INFO L481 AbstractCegarLoop]: Abstraction has 8969 states and 12165 transitions. [2020-10-27 05:12:13,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:12:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 12165 transitions. [2020-10-27 05:12:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:12:13,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:13,014 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:13,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:12:13,015 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:13,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:13,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1545749565, now seen corresponding path program 1 times [2020-10-27 05:12:13,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:13,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737042087] [2020-10-27 05:12:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:13,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:13,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:16,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:12:16,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:12:16,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3826 [2020-10-27 05:12:16,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:16,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:12:16,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:16,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:12:16,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:17,103 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:12:17,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:17,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:17,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:17,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:17,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:17,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:12:17,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:17,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:17,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737042087] [2020-10-27 05:12:17,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:12:17,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 05:12:17,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395818482] [2020-10-27 05:12:17,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:12:17,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:17,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:12:17,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:12:17,159 INFO L87 Difference]: Start difference. First operand 8969 states and 12165 transitions. Second operand 9 states. [2020-10-27 05:12:17,347 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 05:12:18,201 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:12:18,379 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 05:12:20,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:20,193 INFO L93 Difference]: Finished difference Result 19338 states and 26106 transitions. [2020-10-27 05:12:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:12:20,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-10-27 05:12:20,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:20,210 INFO L225 Difference]: With dead ends: 19338 [2020-10-27 05:12:20,210 INFO L226 Difference]: Without dead ends: 10399 [2020-10-27 05:12:20,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:12:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10399 states. [2020-10-27 05:12:21,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10399 to 7116. [2020-10-27 05:12:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7116 states. [2020-10-27 05:12:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 9412 transitions. [2020-10-27 05:12:21,631 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 9412 transitions. Word has length 68 [2020-10-27 05:12:21,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:21,631 INFO L481 AbstractCegarLoop]: Abstraction has 7116 states and 9412 transitions. [2020-10-27 05:12:21,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:12:21,631 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 9412 transitions. [2020-10-27 05:12:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:12:21,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:21,634 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] [2020-10-27 05:12:21,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:12:21,634 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:21,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:21,634 INFO L82 PathProgramCache]: Analyzing trace with hash 730318003, now seen corresponding path program 1 times [2020-10-27 05:12:21,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:21,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003358494] [2020-10-27 05:12:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:21,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:21,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:21,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:21,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:22,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:22,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:25,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:12:25,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:12:25,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3965 [2020-10-27 05:12:25,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:25,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:12:25,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:12:25,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:12:25,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:26,059 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:12:26,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:26,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:26,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:26,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:26,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:12:26,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:26,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:26,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:26,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:26,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:26,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003358494] [2020-10-27 05:12:26,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:12:26,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:12:26,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249408881] [2020-10-27 05:12:26,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:12:26,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:26,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:12:26,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:12:26,108 INFO L87 Difference]: Start difference. First operand 7116 states and 9412 transitions. Second operand 10 states. [2020-10-27 05:12:26,360 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:12:28,469 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:12:28,694 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:12:28,968 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:12:32,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:32,293 INFO L93 Difference]: Finished difference Result 23259 states and 30782 transitions. [2020-10-27 05:12:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 05:12:32,294 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-27 05:12:32,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:32,320 INFO L225 Difference]: With dead ends: 23259 [2020-10-27 05:12:32,320 INFO L226 Difference]: Without dead ends: 18522 [2020-10-27 05:12:32,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:12:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18522 states. [2020-10-27 05:12:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18522 to 11430. [2020-10-27 05:12:35,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11430 states. [2020-10-27 05:12:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11430 states to 11430 states and 15149 transitions. [2020-10-27 05:12:35,053 INFO L78 Accepts]: Start accepts. Automaton has 11430 states and 15149 transitions. Word has length 69 [2020-10-27 05:12:35,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:35,054 INFO L481 AbstractCegarLoop]: Abstraction has 11430 states and 15149 transitions. [2020-10-27 05:12:35,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:12:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 11430 states and 15149 transitions. [2020-10-27 05:12:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:12:35,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:35,056 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] [2020-10-27 05:12:35,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:12:35,057 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash 519671752, now seen corresponding path program 1 times [2020-10-27 05:12:35,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:35,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445469559] [2020-10-27 05:12:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:35,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:39,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:39,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:12:39,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:12:39,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4618 [2020-10-27 05:12:39,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:39,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:12:39,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:39,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:12:39,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:39,995 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:12:39,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:40,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:40,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:40,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:40,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:12:40,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:40,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:40,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:40,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:40,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:40,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445469559] [2020-10-27 05:12:40,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:12:40,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 05:12:40,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820996646] [2020-10-27 05:12:40,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:12:40,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:40,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:12:40,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:12:40,031 INFO L87 Difference]: Start difference. First operand 11430 states and 15149 transitions. Second operand 9 states. [2020-10-27 05:12:40,201 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 05:12:40,936 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:12:41,093 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 05:12:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:44,027 INFO L93 Difference]: Finished difference Result 24298 states and 32011 transitions. [2020-10-27 05:12:44,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:12:44,028 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-10-27 05:12:44,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:44,045 INFO L225 Difference]: With dead ends: 24298 [2020-10-27 05:12:44,045 INFO L226 Difference]: Without dead ends: 12896 [2020-10-27 05:12:44,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:12:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12896 states. [2020-10-27 05:12:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12896 to 9517. [2020-10-27 05:12:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9517 states. [2020-10-27 05:12:46,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9517 states to 9517 states and 12241 transitions. [2020-10-27 05:12:46,187 INFO L78 Accepts]: Start accepts. Automaton has 9517 states and 12241 transitions. Word has length 70 [2020-10-27 05:12:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:46,187 INFO L481 AbstractCegarLoop]: Abstraction has 9517 states and 12241 transitions. [2020-10-27 05:12:46,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:12:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 9517 states and 12241 transitions. [2020-10-27 05:12:46,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:12:46,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:46,189 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-10-27 05:12:46,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 05:12:46,189 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:46,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1166981370, now seen corresponding path program 1 times [2020-10-27 05:12:46,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:46,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204255225] [2020-10-27 05:12:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:46,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:51,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:51,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:12:51,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:12:51,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:12:51,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:12:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:12:51,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:51,555 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:12:51,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:51,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:51,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:51,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:51,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:51,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:12:51,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:51,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:51,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:51,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:51,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:51,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204255225] [2020-10-27 05:12:51,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:12:51,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:12:51,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595529908] [2020-10-27 05:12:51,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:12:51,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:51,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:12:51,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:12:51,598 INFO L87 Difference]: Start difference. First operand 9517 states and 12241 transitions. Second operand 11 states. [2020-10-27 05:12:51,838 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:12:53,636 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 128 [2020-10-27 05:12:53,830 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 05:12:54,091 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:12:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:57,054 INFO L93 Difference]: Finished difference Result 18039 states and 23308 transitions. [2020-10-27 05:12:57,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:12:57,057 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-27 05:12:57,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:57,071 INFO L225 Difference]: With dead ends: 18039 [2020-10-27 05:12:57,071 INFO L226 Difference]: Without dead ends: 11923 [2020-10-27 05:12:57,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=271, Invalid=785, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 05:12:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11923 states. [2020-10-27 05:12:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11923 to 9239. [2020-10-27 05:12:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9239 states. [2020-10-27 05:12:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9239 states to 9239 states and 11862 transitions. [2020-10-27 05:12:59,133 INFO L78 Accepts]: Start accepts. Automaton has 9239 states and 11862 transitions. Word has length 70 [2020-10-27 05:12:59,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:59,134 INFO L481 AbstractCegarLoop]: Abstraction has 9239 states and 11862 transitions. [2020-10-27 05:12:59,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:12:59,134 INFO L276 IsEmpty]: Start isEmpty. Operand 9239 states and 11862 transitions. [2020-10-27 05:12:59,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:12:59,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:59,142 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-27 05:12:59,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 05:12:59,142 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:59,142 INFO L82 PathProgramCache]: Analyzing trace with hash -287107764, now seen corresponding path program 1 times [2020-10-27 05:12:59,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:59,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469914892] [2020-10-27 05:12:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:59,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:59,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:59,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:59,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:59,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:59,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:12:59,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:12:59,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-27 05:12:59,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:59,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:12:59,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:12:59,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 05:12:59,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:59,904 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:12:59,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:59,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:59,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:59,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:59,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:59,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:12:59,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:59,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:59,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:59,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:59,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:59,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469914892] [2020-10-27 05:12:59,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:12:59,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 05:12:59,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105650110] [2020-10-27 05:12:59,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:12:59,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:59,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:12:59,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:12:59,930 INFO L87 Difference]: Start difference. First operand 9239 states and 11862 transitions. Second operand 6 states. [2020-10-27 05:13:00,121 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 05:13:02,024 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:13:02,213 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 05:13:03,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:03,876 INFO L93 Difference]: Finished difference Result 18336 states and 23861 transitions. [2020-10-27 05:13:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:13:03,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:13:03,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:03,894 INFO L225 Difference]: With dead ends: 18336 [2020-10-27 05:13:03,894 INFO L226 Difference]: Without dead ends: 13522 [2020-10-27 05:13:03,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:03,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13522 states. [2020-10-27 05:13:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13522 to 13384. [2020-10-27 05:13:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13384 states. [2020-10-27 05:13:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13384 states to 13384 states and 16987 transitions. [2020-10-27 05:13:06,951 INFO L78 Accepts]: Start accepts. Automaton has 13384 states and 16987 transitions. Word has length 71 [2020-10-27 05:13:06,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:06,951 INFO L481 AbstractCegarLoop]: Abstraction has 13384 states and 16987 transitions. [2020-10-27 05:13:06,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:06,951 INFO L276 IsEmpty]: Start isEmpty. Operand 13384 states and 16987 transitions. [2020-10-27 05:13:06,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 05:13:06,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:06,956 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2020-10-27 05:13:06,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 05:13:06,957 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:06,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:06,957 INFO L82 PathProgramCache]: Analyzing trace with hash 908444509, now seen corresponding path program 1 times [2020-10-27 05:13:06,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:06,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068098619] [2020-10-27 05:13:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:06,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:06,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:07,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:07,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:07,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:07,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:07,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:07,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:07,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:07,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:11,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:11,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 05:13:11,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:13:11,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:13:11,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:11,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:11,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:11,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 05:13:11,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:12,148 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:13:12,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:12,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:12,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:12,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:12,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:13:12,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:12,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 05:13:12,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068098619] [2020-10-27 05:13:12,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:13:12,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 05:13:12,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632195240] [2020-10-27 05:13:12,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:12,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:12,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:12,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:12,191 INFO L87 Difference]: Start difference. First operand 13384 states and 16987 transitions. Second operand 6 states. [2020-10-27 05:13:12,381 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 05:13:13,297 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 05:13:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:15,416 INFO L93 Difference]: Finished difference Result 20346 states and 25839 transitions. [2020-10-27 05:13:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:13:15,417 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-10-27 05:13:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:15,431 INFO L225 Difference]: With dead ends: 20346 [2020-10-27 05:13:15,431 INFO L226 Difference]: Without dead ends: 10860 [2020-10-27 05:13:15,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10860 states. [2020-10-27 05:13:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10860 to 8814. [2020-10-27 05:13:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8814 states. [2020-10-27 05:13:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8814 states to 8814 states and 11187 transitions. [2020-10-27 05:13:17,648 INFO L78 Accepts]: Start accepts. Automaton has 8814 states and 11187 transitions. Word has length 94 [2020-10-27 05:13:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:17,648 INFO L481 AbstractCegarLoop]: Abstraction has 8814 states and 11187 transitions. [2020-10-27 05:13:17,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8814 states and 11187 transitions. [2020-10-27 05:13:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 05:13:17,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:17,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2020-10-27 05:13:17,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 05:13:17,651 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:17,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1680308162, now seen corresponding path program 2 times [2020-10-27 05:13:17,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:17,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169945262] [2020-10-27 05:13:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:17,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:18,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:18,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 05:13:18,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:13:18,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-27 05:13:18,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:18,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:18,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 05:13:18,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 05:13:18,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:18,495 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:13:18,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:18,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:18,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:18,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:18,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:18,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:13:18,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:18,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-27 05:13:18,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169945262] [2020-10-27 05:13:18,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:18,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:13:18,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659994047] [2020-10-27 05:13:18,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:13:18,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:18,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:13:18,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:13:18,517 INFO L87 Difference]: Start difference. First operand 8814 states and 11187 transitions. Second operand 4 states. [2020-10-27 05:13:18,693 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 05:13:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:21,481 INFO L93 Difference]: Finished difference Result 16309 states and 20841 transitions. [2020-10-27 05:13:21,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:13:21,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-10-27 05:13:21,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:21,491 INFO L225 Difference]: With dead ends: 16309 [2020-10-27 05:13:21,491 INFO L226 Difference]: Without dead ends: 9970 [2020-10-27 05:13:21,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:13:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9970 states. [2020-10-27 05:13:23,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9970 to 9967. [2020-10-27 05:13:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9967 states. [2020-10-27 05:13:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9967 states to 9967 states and 12579 transitions. [2020-10-27 05:13:23,975 INFO L78 Accepts]: Start accepts. Automaton has 9967 states and 12579 transitions. Word has length 94 [2020-10-27 05:13:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:23,975 INFO L481 AbstractCegarLoop]: Abstraction has 9967 states and 12579 transitions. [2020-10-27 05:13:23,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:13:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 9967 states and 12579 transitions. [2020-10-27 05:13:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 05:13:23,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:23,980 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2020-10-27 05:13:23,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 05:13:23,980 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:23,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1193825533, now seen corresponding path program 1 times [2020-10-27 05:13:23,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:23,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747955546] [2020-10-27 05:13:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:24,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:26,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:29,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:29,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 05:13:29,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:13:29,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:13:29,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:29,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 05:13:29,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:29,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 05:13:29,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:29,734 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:13:29,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:29,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:29,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:29,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:29,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:29,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:13:29,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:29,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:29,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:29,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:29,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 13 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:29,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747955546] [2020-10-27 05:13:29,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:13:29,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 05:13:29,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079475500] [2020-10-27 05:13:29,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 05:13:29,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:29,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 05:13:29,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:13:29,848 INFO L87 Difference]: Start difference. First operand 9967 states and 12579 transitions. Second operand 17 states. [2020-10-27 05:13:30,433 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 137 [2020-10-27 05:13:33,494 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 05:13:33,723 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:13:33,959 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 05:13:34,185 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 05:13:36,117 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:13:39,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:39,995 INFO L93 Difference]: Finished difference Result 24860 states and 31092 transitions. [2020-10-27 05:13:39,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 05:13:39,996 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 111 [2020-10-27 05:13:39,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:40,019 INFO L225 Difference]: With dead ends: 24860 [2020-10-27 05:13:40,019 INFO L226 Difference]: Without dead ends: 22031 [2020-10-27 05:13:40,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=333, Invalid=2319, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 05:13:40,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22031 states. [2020-10-27 05:13:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22031 to 12655. [2020-10-27 05:13:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12655 states. [2020-10-27 05:13:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12655 states to 12655 states and 15965 transitions. [2020-10-27 05:13:43,443 INFO L78 Accepts]: Start accepts. Automaton has 12655 states and 15965 transitions. Word has length 111 [2020-10-27 05:13:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:43,443 INFO L481 AbstractCegarLoop]: Abstraction has 12655 states and 15965 transitions. [2020-10-27 05:13:43,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 05:13:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 12655 states and 15965 transitions. [2020-10-27 05:13:43,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 05:13:43,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:43,448 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:13:43,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 05:13:43,448 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:43,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:43,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1882132102, now seen corresponding path program 1 times [2020-10-27 05:13:43,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:43,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182580780] [2020-10-27 05:13:43,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:43,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:48,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 05:13:48,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:13:48,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:13:48,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:48,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:48,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:13:48,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 05:13:48,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:48,664 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 05:13:48,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:48,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:48,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:48,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:48,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:13:48,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:48,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:48,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:48,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:48,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-27 05:13:48,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182580780] [2020-10-27 05:13:48,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:13:48,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 05:13:48,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941904926] [2020-10-27 05:13:48,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:48,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:48,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:48,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:48,697 INFO L87 Difference]: Start difference. First operand 12655 states and 15965 transitions. Second operand 6 states. [2020-10-27 05:13:48,896 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:13:50,098 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 05:13:50,410 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 05:13:50,579 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:13:56,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:56,858 INFO L93 Difference]: Finished difference Result 38028 states and 48515 transitions. [2020-10-27 05:13:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:13:56,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2020-10-27 05:13:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:56,893 INFO L225 Difference]: With dead ends: 38028 [2020-10-27 05:13:56,893 INFO L226 Difference]: Without dead ends: 26905 [2020-10-27 05:13:56,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:13:56,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26905 states. [2020-10-27 05:14:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26905 to 23158. [2020-10-27 05:14:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23158 states. [2020-10-27 05:14:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23158 states to 23158 states and 29162 transitions. [2020-10-27 05:14:03,388 INFO L78 Accepts]: Start accepts. Automaton has 23158 states and 29162 transitions. Word has length 111 [2020-10-27 05:14:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:03,388 INFO L481 AbstractCegarLoop]: Abstraction has 23158 states and 29162 transitions. [2020-10-27 05:14:03,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:14:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 23158 states and 29162 transitions. [2020-10-27 05:14:03,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 05:14:03,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:03,393 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2020-10-27 05:14:03,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 05:14:03,393 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:03,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:03,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1876296443, now seen corresponding path program 1 times [2020-10-27 05:14:03,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:03,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364893292] [2020-10-27 05:14:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:03,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:03,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:03,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking...