/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.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:31:11,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:31:11,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:31:11,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:31:11,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:31:11,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:31:11,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:31:11,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:31:11,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:31:11,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:31:11,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:31:11,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:31:11,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:31:11,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:31:11,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:31:11,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:31:11,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:31:11,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:31:11,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:31:11,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:31:11,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:31:11,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:31:11,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:31:11,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:31:11,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:31:11,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:31:11,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:31:11,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:31:11,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:31:11,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:31:11,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:31:11,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:31:11,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:31:11,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:31:11,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:31:11,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:31:11,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:31:11,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:31:11,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:31:11,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:31:11,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:31:11,373 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 05:31:11,415 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:31:11,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:31:11,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:31:11,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:31:11,417 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:31:11,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:31:11,417 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:31:11,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:31:11,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:31:11,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:31:11,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:31:11,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:31:11,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:31:11,419 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:31:11,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:31:11,419 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:31:11,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:31:11,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:31:11,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:31:11,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:31:11,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:31:11,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:31:11,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:31:11,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:31:11,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:31:11,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:31:11,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:31:11,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:31:11,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:31:11,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:31:11,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:31:11,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:31:11,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:31:11,800 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:31:11,801 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:31:11,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2020-10-27 05:31:11,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/532495869/bb9d079d16854f48bea4cb863e21f52b/FLAG4f7828cf5 [2020-10-27 05:31:12,525 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:31:12,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2020-10-27 05:31:12,544 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/532495869/bb9d079d16854f48bea4cb863e21f52b/FLAG4f7828cf5 [2020-10-27 05:31:12,824 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/532495869/bb9d079d16854f48bea4cb863e21f52b [2020-10-27 05:31:12,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:31:12,835 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:31:12,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:31:12,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:31:12,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:31:12,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:31:12" (1/1) ... [2020-10-27 05:31:12,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5677bf1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:12, skipping insertion in model container [2020-10-27 05:31:12,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:31:12" (1/1) ... [2020-10-27 05:31:12,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:31:12,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:31:13,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:31:13,248 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:31:13,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:31:13,395 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:31:13,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:13 WrapperNode [2020-10-27 05:31:13,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:31:13,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:31:13,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:31:13,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:31:13,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:13" (1/1) ... [2020-10-27 05:31:13,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:13" (1/1) ... [2020-10-27 05:31:13,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:13" (1/1) ... [2020-10-27 05:31:13,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:13" (1/1) ... [2020-10-27 05:31:13,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:13" (1/1) ... [2020-10-27 05:31:13,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:13" (1/1) ... [2020-10-27 05:31:13,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:13" (1/1) ... [2020-10-27 05:31:13,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:31:13,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:31:13,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:31:13,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:31:13,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:13" (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 05:31:13,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:31:13,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:31:13,620 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:31:13,620 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:31:13,620 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:31:13,621 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:31:13,621 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:31:13,621 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:31:13,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:31:13,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:31:13,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:31:13,623 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:31:13,623 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:31:13,623 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:31:13,623 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:31:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:31:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:31:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:31:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:31:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:31:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:31:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-27 05:31:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure node8 [2020-10-27 05:31:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:31:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:31:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:31:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:31:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:31:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:31:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:31:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:31:13,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:31:14,882 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:31:14,883 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:31:14,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:31:14 BoogieIcfgContainer [2020-10-27 05:31:14,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:31:14,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:31:14,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:31:14,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:31:14,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:31:12" (1/3) ... [2020-10-27 05:31:14,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1ff578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:31:14, skipping insertion in model container [2020-10-27 05:31:14,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:13" (2/3) ... [2020-10-27 05:31:14,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1ff578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:31:14, skipping insertion in model container [2020-10-27 05:31:14,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:31:14" (3/3) ... [2020-10-27 05:31:14,894 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2020-10-27 05:31:14,905 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:31:14,910 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:31:14,923 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:31:14,948 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:31:14,948 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:31:14,949 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:31:14,949 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:31:14,949 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:31:14,949 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:31:14,949 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:31:14,949 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:31:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states. [2020-10-27 05:31:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 05:31:14,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:31:14,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:31:14,984 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:31:14,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:31:14,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1569647866, now seen corresponding path program 1 times [2020-10-27 05:31:15,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:31:15,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755377822] [2020-10-27 05:31:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:31:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:15,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:15,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:15,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:16,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:16,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:17,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:17,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:20,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:20,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 05:31:20,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:31:20,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:31:20,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:20,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:31:20,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 05:31:20,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:31:20,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:31:21,080 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:31:21,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:31:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:21,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:21,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:21,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:31:21,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:31:21,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:31:21,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:31:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:31:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:31:21,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:21,173 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 05:31:21,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755377822] [2020-10-27 05:31:21,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:31:21,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:31:21,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231107598] [2020-10-27 05:31:21,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:31:21,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:31:21,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:31:21,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:31:21,200 INFO L87 Difference]: Start difference. First operand 166 states. Second operand 4 states. [2020-10-27 05:31:21,756 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:31:23,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:31:23,297 INFO L93 Difference]: Finished difference Result 348 states and 569 transitions. [2020-10-27 05:31:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:31:23,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-27 05:31:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:31:23,312 INFO L225 Difference]: With dead ends: 348 [2020-10-27 05:31:23,312 INFO L226 Difference]: Without dead ends: 242 [2020-10-27 05:31:23,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:31:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-27 05:31:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 239. [2020-10-27 05:31:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-27 05:31:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 340 transitions. [2020-10-27 05:31:23,392 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 340 transitions. Word has length 106 [2020-10-27 05:31:23,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:31:23,393 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 340 transitions. [2020-10-27 05:31:23,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:31:23,394 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 340 transitions. [2020-10-27 05:31:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 05:31:23,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:31:23,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:31:23,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:31:23,399 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:31:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:31:23,399 INFO L82 PathProgramCache]: Analyzing trace with hash 635447983, now seen corresponding path program 1 times [2020-10-27 05:31:23,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:31:23,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867500861] [2020-10-27 05:31:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:31:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:23,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:23,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:23,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:23,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:24,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:25,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:25,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:28,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:28,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 05:31:28,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:31:28,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 05:31:28,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:28,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:31:28,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:31:28,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 05:31:28,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:29,044 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:31:29,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:31:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:29,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:29,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:29,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:31:29,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:31:29,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 05:31:29,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:31:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:31:29,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:31:29,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:29,198 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 05:31:29,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867500861] [2020-10-27 05:31:29,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:31:29,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:31:29,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140601706] [2020-10-27 05:31:29,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:31:29,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:31:29,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:31:29,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:31:29,205 INFO L87 Difference]: Start difference. First operand 239 states and 340 transitions. Second operand 6 states. [2020-10-27 05:31:29,693 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 05:31:31,025 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:31:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:31:31,056 INFO L93 Difference]: Finished difference Result 580 states and 882 transitions. [2020-10-27 05:31:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:31:31,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2020-10-27 05:31:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:31:31,061 INFO L225 Difference]: With dead ends: 580 [2020-10-27 05:31:31,062 INFO L226 Difference]: Without dead ends: 409 [2020-10-27 05:31:31,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:31:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-10-27 05:31:31,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 406. [2020-10-27 05:31:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-10-27 05:31:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 607 transitions. [2020-10-27 05:31:31,122 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 607 transitions. Word has length 107 [2020-10-27 05:31:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:31:31,123 INFO L481 AbstractCegarLoop]: Abstraction has 406 states and 607 transitions. [2020-10-27 05:31:31,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:31:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 607 transitions. [2020-10-27 05:31:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 05:31:31,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:31:31,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:31:31,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:31:31,130 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:31:31,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:31:31,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1808875030, now seen corresponding path program 1 times [2020-10-27 05:31:31,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:31:31,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893074079] [2020-10-27 05:31:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:31:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:31,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:31,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:31,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:31,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:31,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:31,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:34,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:34,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:36,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:36,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 05:31:36,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:31:36,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 05:31:36,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:36,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:31:36,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:31:36,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 05:31:36,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:36,985 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:31:36,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:31:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:37,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:37,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:37,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:31:37,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:31:37,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:31:37,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:37,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:31:37,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:31:37,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:31:37,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:37,097 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 05:31:37,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893074079] [2020-10-27 05:31:37,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:31:37,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:31:37,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598604283] [2020-10-27 05:31:37,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:31:37,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:31:37,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:31:37,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:31:37,103 INFO L87 Difference]: Start difference. First operand 406 states and 607 transitions. Second operand 11 states. [2020-10-27 05:31:37,659 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2020-10-27 05:31:39,282 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-27 05:31:39,749 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:31:40,214 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 05:31:40,706 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 05:31:41,185 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-27 05:31:41,683 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 05:31:42,116 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:31:42,689 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:31:43,142 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:31:43,629 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 05:31:44,145 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-27 05:31:44,667 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 05:31:45,130 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 05:31:46,008 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-27 05:31:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:31:46,120 INFO L93 Difference]: Finished difference Result 5814 states and 9231 transitions. [2020-10-27 05:31:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:31:46,121 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 107 [2020-10-27 05:31:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:31:46,154 INFO L225 Difference]: With dead ends: 5814 [2020-10-27 05:31:46,155 INFO L226 Difference]: Without dead ends: 5476 [2020-10-27 05:31:46,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=420, Invalid=1062, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 05:31:46,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2020-10-27 05:31:46,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 741. [2020-10-27 05:31:46,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2020-10-27 05:31:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1136 transitions. [2020-10-27 05:31:46,317 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1136 transitions. Word has length 107 [2020-10-27 05:31:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:31:46,320 INFO L481 AbstractCegarLoop]: Abstraction has 741 states and 1136 transitions. [2020-10-27 05:31:46,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:31:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1136 transitions. [2020-10-27 05:31:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:31:46,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:31:46,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:31:46,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:31:46,330 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:31:46,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:31:46,330 INFO L82 PathProgramCache]: Analyzing trace with hash -819138947, now seen corresponding path program 1 times [2020-10-27 05:31:46,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:31:46,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199330950] [2020-10-27 05:31:46,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:31:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:46,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:46,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:46,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:46,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:46,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:46,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:47,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:47,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:51,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:51,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:31:51,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:31:51,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:31:51,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:51,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:31:51,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:31:51,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:31:51,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:51,944 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:31:51,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:31:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:51,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:52,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:52,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:31:52,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:31:52,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 05:31:52,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:52,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:31:52,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:31:52,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:31:52,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:52,086 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 05:31:52,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199330950] [2020-10-27 05:31:52,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:31:52,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:31:52,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481904980] [2020-10-27 05:31:52,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:31:52,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:31:52,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:31:52,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:31:52,090 INFO L87 Difference]: Start difference. First operand 741 states and 1136 transitions. Second operand 7 states. [2020-10-27 05:31:52,503 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 05:31:53,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:31:53,684 INFO L93 Difference]: Finished difference Result 2522 states and 3953 transitions. [2020-10-27 05:31:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:31:53,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-27 05:31:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:31:53,699 INFO L225 Difference]: With dead ends: 2522 [2020-10-27 05:31:53,699 INFO L226 Difference]: Without dead ends: 1849 [2020-10-27 05:31:53,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:31:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2020-10-27 05:31:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 750. [2020-10-27 05:31:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2020-10-27 05:31:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1147 transitions. [2020-10-27 05:31:53,816 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1147 transitions. Word has length 109 [2020-10-27 05:31:53,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:31:53,818 INFO L481 AbstractCegarLoop]: Abstraction has 750 states and 1147 transitions. [2020-10-27 05:31:53,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:31:53,818 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1147 transitions. [2020-10-27 05:31:53,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:31:53,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:31:53,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:31:53,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:31:53,820 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:31:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:31:53,820 INFO L82 PathProgramCache]: Analyzing trace with hash 573204983, now seen corresponding path program 1 times [2020-10-27 05:31:53,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:31:53,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051155499] [2020-10-27 05:31:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:31:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:53,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:53,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:53,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:54,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:54,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:54,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:54,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:55,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:58,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:58,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:31:58,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:31:58,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:31:58,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:58,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:31:58,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:31:58,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 05:31:58,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:59,421 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:31:59,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:31:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:59,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:59,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:59,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:31:59,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:31:59,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:31:59,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:59,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:31:59,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:31:59,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:31:59,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:31:59,527 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 05:31:59,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051155499] [2020-10-27 05:31:59,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:31:59,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:31:59,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055153641] [2020-10-27 05:31:59,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:31:59,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:31:59,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:31:59,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:31:59,532 INFO L87 Difference]: Start difference. First operand 750 states and 1147 transitions. Second operand 7 states. [2020-10-27 05:31:59,963 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 05:32:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:32:01,168 INFO L93 Difference]: Finished difference Result 2450 states and 3836 transitions. [2020-10-27 05:32:01,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:32:01,168 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-27 05:32:01,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:32:01,178 INFO L225 Difference]: With dead ends: 2450 [2020-10-27 05:32:01,178 INFO L226 Difference]: Without dead ends: 1777 [2020-10-27 05:32:01,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:32:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2020-10-27 05:32:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 758. [2020-10-27 05:32:01,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 758 states. [2020-10-27 05:32:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1158 transitions. [2020-10-27 05:32:01,293 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1158 transitions. Word has length 109 [2020-10-27 05:32:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:32:01,293 INFO L481 AbstractCegarLoop]: Abstraction has 758 states and 1158 transitions. [2020-10-27 05:32:01,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:32:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1158 transitions. [2020-10-27 05:32:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:32:01,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:01,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:01,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:32:01,295 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash 881859179, now seen corresponding path program 1 times [2020-10-27 05:32:01,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:01,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340941611] [2020-10-27 05:32:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:01,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:01,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:01,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:01,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:01,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:01,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:02,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:02,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:06,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:06,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:32:06,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:32:06,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 05:32:06,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:06,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:32:06,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:32:06,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-27 05:32:06,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:06,857 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:32:06,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:32:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:06,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:06,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:06,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:32:06,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:32:06,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:32:06,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:06,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:32:06,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:32:06,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:32:06,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:06,948 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 05:32:06,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340941611] [2020-10-27 05:32:06,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:32:06,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:32:06,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708199725] [2020-10-27 05:32:06,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:32:06,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:32:06,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:32:06,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:32:06,951 INFO L87 Difference]: Start difference. First operand 758 states and 1158 transitions. Second operand 7 states. [2020-10-27 05:32:07,395 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 05:32:08,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:32:08,657 INFO L93 Difference]: Finished difference Result 2316 states and 3619 transitions. [2020-10-27 05:32:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:32:08,658 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-27 05:32:08,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:32:08,668 INFO L225 Difference]: With dead ends: 2316 [2020-10-27 05:32:08,668 INFO L226 Difference]: Without dead ends: 1643 [2020-10-27 05:32:08,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:32:08,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2020-10-27 05:32:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 780. [2020-10-27 05:32:08,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2020-10-27 05:32:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1190 transitions. [2020-10-27 05:32:08,793 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1190 transitions. Word has length 109 [2020-10-27 05:32:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:32:08,793 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 1190 transitions. [2020-10-27 05:32:08,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:32:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1190 transitions. [2020-10-27 05:32:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:32:08,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:08,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:08,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:32:08,795 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:08,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1301189409, now seen corresponding path program 1 times [2020-10-27 05:32:08,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:08,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589123320] [2020-10-27 05:32:08,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:08,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:08,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:08,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:08,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:09,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:09,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:09,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:09,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:13,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:13,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:13,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:13,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:32:13,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:32:13,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:32:13,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:32:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:32:13,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 05:32:13,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:14,319 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:32:14,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:32:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:14,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:14,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:14,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:32:14,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:32:14,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:32:14,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:14,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:32:14,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:32:14,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:32:14,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:14,399 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 05:32:14,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589123320] [2020-10-27 05:32:14,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:32:14,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:32:14,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634031464] [2020-10-27 05:32:14,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:32:14,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:32:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:32:14,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:32:14,402 INFO L87 Difference]: Start difference. First operand 780 states and 1190 transitions. Second operand 7 states. [2020-10-27 05:32:14,848 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:32:16,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:32:16,151 INFO L93 Difference]: Finished difference Result 2136 states and 3333 transitions. [2020-10-27 05:32:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:32:16,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-27 05:32:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:32:16,160 INFO L225 Difference]: With dead ends: 2136 [2020-10-27 05:32:16,160 INFO L226 Difference]: Without dead ends: 1463 [2020-10-27 05:32:16,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:32:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2020-10-27 05:32:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 820. [2020-10-27 05:32:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2020-10-27 05:32:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1252 transitions. [2020-10-27 05:32:16,297 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1252 transitions. Word has length 109 [2020-10-27 05:32:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:32:16,297 INFO L481 AbstractCegarLoop]: Abstraction has 820 states and 1252 transitions. [2020-10-27 05:32:16,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:32:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1252 transitions. [2020-10-27 05:32:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:32:16,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:16,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:16,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:32:16,299 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:16,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:16,300 INFO L82 PathProgramCache]: Analyzing trace with hash -565087527, now seen corresponding path program 1 times [2020-10-27 05:32:16,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:16,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64812010] [2020-10-27 05:32:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:16,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:16,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:16,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:16,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:16,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:16,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:16,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:16,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:20,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:21,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:21,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:21,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:32:21,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:32:21,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:32:21,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:21,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:32:21,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:32:21,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 05:32:21,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:21,861 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:32:21,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:32:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:21,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:21,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:21,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:32:21,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:32:21,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:32:21,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:21,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:32:21,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:32:21,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:32:21,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:21,998 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 05:32:21,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64812010] [2020-10-27 05:32:21,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:32:21,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:32:22,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491738719] [2020-10-27 05:32:22,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:32:22,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:32:22,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:32:22,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:32:22,005 INFO L87 Difference]: Start difference. First operand 820 states and 1252 transitions. Second operand 7 states. [2020-10-27 05:32:22,430 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 05:32:23,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:32:23,708 INFO L93 Difference]: Finished difference Result 2132 states and 3319 transitions. [2020-10-27 05:32:23,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:32:23,708 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-27 05:32:23,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:32:23,714 INFO L225 Difference]: With dead ends: 2132 [2020-10-27 05:32:23,715 INFO L226 Difference]: Without dead ends: 1459 [2020-10-27 05:32:23,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:32:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2020-10-27 05:32:23,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 836. [2020-10-27 05:32:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-10-27 05:32:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1274 transitions. [2020-10-27 05:32:23,831 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1274 transitions. Word has length 109 [2020-10-27 05:32:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:32:23,831 INFO L481 AbstractCegarLoop]: Abstraction has 836 states and 1274 transitions. [2020-10-27 05:32:23,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:32:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1274 transitions. [2020-10-27 05:32:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:32:23,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:23,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:23,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:32:23,833 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:23,833 INFO L82 PathProgramCache]: Analyzing trace with hash -173470512, now seen corresponding path program 1 times [2020-10-27 05:32:23,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:23,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188755469] [2020-10-27 05:32:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:23,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:23,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:23,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:24,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:24,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:24,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:24,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:26,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:28,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:28,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:32:28,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:32:28,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:32:28,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:28,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:32:28,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:32:28,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 05:32:28,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:29,474 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:32:29,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:32:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:29,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:29,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:29,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:32:29,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:32:29,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:32:29,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:29,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:32:29,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:32:29,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:32:29,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:29,559 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 05:32:29,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188755469] [2020-10-27 05:32:29,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:32:29,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:32:29,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470836382] [2020-10-27 05:32:29,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:32:29,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:32:29,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:32:29,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:32:29,561 INFO L87 Difference]: Start difference. First operand 836 states and 1274 transitions. Second operand 11 states. [2020-10-27 05:32:30,217 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 05:32:31,749 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:32:32,217 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:32:32,810 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 243 [2020-10-27 05:32:33,294 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-27 05:32:34,318 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-27 05:32:34,761 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:32:35,248 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 05:32:35,766 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 241 [2020-10-27 05:32:36,355 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-10-27 05:32:36,875 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 05:32:37,344 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-27 05:32:37,865 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-10-27 05:32:38,440 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 246 [2020-10-27 05:32:38,884 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:32:39,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:32:39,341 INFO L93 Difference]: Finished difference Result 6258 states and 9854 transitions. [2020-10-27 05:32:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:32:39,342 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2020-10-27 05:32:39,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:32:39,366 INFO L225 Difference]: With dead ends: 6258 [2020-10-27 05:32:39,367 INFO L226 Difference]: Without dead ends: 5585 [2020-10-27 05:32:39,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=420, Invalid=1062, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 05:32:39,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5585 states. [2020-10-27 05:32:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5585 to 836. [2020-10-27 05:32:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-10-27 05:32:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1270 transitions. [2020-10-27 05:32:39,586 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1270 transitions. Word has length 109 [2020-10-27 05:32:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:32:39,586 INFO L481 AbstractCegarLoop]: Abstraction has 836 states and 1270 transitions. [2020-10-27 05:32:39,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:32:39,587 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1270 transitions. [2020-10-27 05:32:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:32:39,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:39,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:39,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:32:39,588 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:39,589 INFO L82 PathProgramCache]: Analyzing trace with hash -795000145, now seen corresponding path program 1 times [2020-10-27 05:32:39,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:39,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944190745] [2020-10-27 05:32:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:39,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:39,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:39,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:39,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:40,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:40,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:40,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:42,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:42,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:42,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:44,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:44,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:32:44,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:32:44,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:32:44,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:32:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:32:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 05:32:44,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:45,041 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:32:45,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:32:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:45,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:45,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:45,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:32:45,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:32:45,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:32:45,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:32:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:32:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:32:45,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:45,078 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 05:32:45,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944190745] [2020-10-27 05:32:45,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:32:45,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:32:45,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781933548] [2020-10-27 05:32:45,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:32:45,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:32:45,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:32:45,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:32:45,080 INFO L87 Difference]: Start difference. First operand 836 states and 1270 transitions. Second operand 4 states. [2020-10-27 05:32:45,495 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-27 05:32:46,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:32:46,335 INFO L93 Difference]: Finished difference Result 1677 states and 2596 transitions. [2020-10-27 05:32:46,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:32:46,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-27 05:32:46,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:32:46,339 INFO L225 Difference]: With dead ends: 1677 [2020-10-27 05:32:46,339 INFO L226 Difference]: Without dead ends: 1004 [2020-10-27 05:32:46,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:32:46,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2020-10-27 05:32:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 1001. [2020-10-27 05:32:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2020-10-27 05:32:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1527 transitions. [2020-10-27 05:32:46,533 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1527 transitions. Word has length 109 [2020-10-27 05:32:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:32:46,534 INFO L481 AbstractCegarLoop]: Abstraction has 1001 states and 1527 transitions. [2020-10-27 05:32:46,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:32:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1527 transitions. [2020-10-27 05:32:46,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:32:46,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:46,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:46,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:32:46,536 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:46,536 INFO L82 PathProgramCache]: Analyzing trace with hash 35409765, now seen corresponding path program 1 times [2020-10-27 05:32:46,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:46,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698374319] [2020-10-27 05:32:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:46,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:46,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:46,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:46,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:46,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:46,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:46,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:47,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:50,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:50,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:51,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:51,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:32:51,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:32:51,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:32:51,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:51,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:32:51,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:32:51,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 05:32:51,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:52,039 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:32:52,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:32:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:52,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:52,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:52,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:32:52,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:32:52,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:32:52,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:32:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:32:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:32:52,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:52,124 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 05:32:52,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698374319] [2020-10-27 05:32:52,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:32:52,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:32:52,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808001625] [2020-10-27 05:32:52,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:32:52,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:32:52,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:32:52,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:32:52,128 INFO L87 Difference]: Start difference. First operand 1001 states and 1527 transitions. Second operand 7 states. [2020-10-27 05:32:52,560 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-27 05:32:53,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:32:53,953 INFO L93 Difference]: Finished difference Result 2694 states and 4189 transitions. [2020-10-27 05:32:53,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:32:53,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-27 05:32:53,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:32:53,961 INFO L225 Difference]: With dead ends: 2694 [2020-10-27 05:32:53,961 INFO L226 Difference]: Without dead ends: 1842 [2020-10-27 05:32:53,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:32:53,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2020-10-27 05:32:54,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1001. [2020-10-27 05:32:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2020-10-27 05:32:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1525 transitions. [2020-10-27 05:32:54,173 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1525 transitions. Word has length 109 [2020-10-27 05:32:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:32:54,173 INFO L481 AbstractCegarLoop]: Abstraction has 1001 states and 1525 transitions. [2020-10-27 05:32:54,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:32:54,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1525 transitions. [2020-10-27 05:32:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 05:32:54,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:32:54,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:32:54,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:32:54,175 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:32:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:32:54,176 INFO L82 PathProgramCache]: Analyzing trace with hash 82497009, now seen corresponding path program 1 times [2020-10-27 05:32:54,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:32:54,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896913140] [2020-10-27 05:32:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:32:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:54,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:54,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:54,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:54,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:54,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:54,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:55,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:55,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:59,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:59,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 05:32:59,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:32:59,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:32:59,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:59,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:32:59,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:32:59,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 05:32:59,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:59,651 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:32:59,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:32:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:32:59,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:32:59,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:32:59,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:32:59,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:32:59,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:32:59,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:32:59,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:32:59,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:32:59,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:32:59,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:59,732 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 05:32:59,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896913140] [2020-10-27 05:32:59,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:32:59,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:32:59,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878383818] [2020-10-27 05:32:59,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:32:59,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:32:59,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:32:59,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:32:59,735 INFO L87 Difference]: Start difference. First operand 1001 states and 1525 transitions. Second operand 7 states. [2020-10-27 05:33:00,184 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-27 05:33:01,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:01,559 INFO L93 Difference]: Finished difference Result 3037 states and 4722 transitions. [2020-10-27 05:33:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:33:01,560 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-27 05:33:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:01,570 INFO L225 Difference]: With dead ends: 3037 [2020-10-27 05:33:01,570 INFO L226 Difference]: Without dead ends: 2135 [2020-10-27 05:33:01,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:33:01,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2020-10-27 05:33:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 969. [2020-10-27 05:33:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 969 states. [2020-10-27 05:33:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1477 transitions. [2020-10-27 05:33:01,761 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1477 transitions. Word has length 109 [2020-10-27 05:33:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:01,762 INFO L481 AbstractCegarLoop]: Abstraction has 969 states and 1477 transitions. [2020-10-27 05:33:01,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:33:01,762 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1477 transitions. [2020-10-27 05:33:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 05:33:01,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:01,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:33:01,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:33:01,763 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:01,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:01,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1142080761, now seen corresponding path program 1 times [2020-10-27 05:33:01,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:01,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690489264] [2020-10-27 05:33:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:01,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:01,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:01,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:01,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:01,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:02,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:02,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:04,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:06,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:06,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 05:33:06,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:33:06,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 05:33:06,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:06,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:06,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 05:33:06,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:33:06,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:07,206 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:33:07,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:07,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:07,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:07,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:07,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:07,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:33:07,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:07,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:33:07,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:33:07,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:07,252 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 05:33:07,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690489264] [2020-10-27 05:33:07,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:07,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:33:07,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095563098] [2020-10-27 05:33:07,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:33:07,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:07,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:33:07,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:33:07,254 INFO L87 Difference]: Start difference. First operand 969 states and 1477 transitions. Second operand 4 states. [2020-10-27 05:33:07,673 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:33:08,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:08,852 INFO L93 Difference]: Finished difference Result 2614 states and 4059 transitions. [2020-10-27 05:33:08,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:33:08,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-10-27 05:33:08,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:08,859 INFO L225 Difference]: With dead ends: 2614 [2020-10-27 05:33:08,859 INFO L226 Difference]: Without dead ends: 1725 [2020-10-27 05:33:08,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:33:08,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2020-10-27 05:33:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1722. [2020-10-27 05:33:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1722 states. [2020-10-27 05:33:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 2653 transitions. [2020-10-27 05:33:09,198 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 2653 transitions. Word has length 110 [2020-10-27 05:33:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:09,198 INFO L481 AbstractCegarLoop]: Abstraction has 1722 states and 2653 transitions. [2020-10-27 05:33:09,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:33:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 2653 transitions. [2020-10-27 05:33:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 05:33:09,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:09,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:33:09,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:33:09,200 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:09,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:09,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1710157399, now seen corresponding path program 1 times [2020-10-27 05:33:09,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:09,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726184796] [2020-10-27 05:33:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:09,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:09,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:09,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:09,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:09,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:10,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:10,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:14,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:14,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:14,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 05:33:14,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:33:14,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:33:14,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:14,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:33:14,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:14,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 05:33:14,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:14,667 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:33:14,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:14,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:14,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:14,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:14,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:14,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:33:14,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:14,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:14,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:14,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:14,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:14,725 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 05:33:14,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726184796] [2020-10-27 05:33:14,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:14,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:33:14,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697260310] [2020-10-27 05:33:14,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:33:14,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:14,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:33:14,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:33:14,728 INFO L87 Difference]: Start difference. First operand 1722 states and 2653 transitions. Second operand 6 states. [2020-10-27 05:33:15,169 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 05:33:16,583 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:33:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:16,908 INFO L93 Difference]: Finished difference Result 4949 states and 7705 transitions. [2020-10-27 05:33:16,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:33:16,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2020-10-27 05:33:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:16,917 INFO L225 Difference]: With dead ends: 4949 [2020-10-27 05:33:16,917 INFO L226 Difference]: Without dead ends: 3305 [2020-10-27 05:33:16,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:33:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3305 states. [2020-10-27 05:33:17,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3305 to 3302. [2020-10-27 05:33:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3302 states. [2020-10-27 05:33:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 5120 transitions. [2020-10-27 05:33:17,519 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 5120 transitions. Word has length 111 [2020-10-27 05:33:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:17,519 INFO L481 AbstractCegarLoop]: Abstraction has 3302 states and 5120 transitions. [2020-10-27 05:33:17,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:33:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 5120 transitions. [2020-10-27 05:33:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 05:33:17,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:17,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:33:17,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:33:17,521 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash -31259716, now seen corresponding path program 1 times [2020-10-27 05:33:17,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:17,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344432637] [2020-10-27 05:33:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:17,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:17,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:17,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:17,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:17,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:17,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:19,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:22,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:22,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 05:33:22,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:33:22,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:33:22,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:22,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:22,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 05:33:22,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:33:22,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:22,969 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:33:22,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:22,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:22,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:22,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:22,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:22,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:33:22,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:22,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:33:22,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:22,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:33:22,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:23,013 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 05:33:23,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344432637] [2020-10-27 05:33:23,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:23,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:33:23,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399797825] [2020-10-27 05:33:23,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:33:23,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:23,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:33:23,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:33:23,015 INFO L87 Difference]: Start difference. First operand 3302 states and 5120 transitions. Second operand 4 states. [2020-10-27 05:33:23,452 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:33:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:25,419 INFO L93 Difference]: Finished difference Result 9369 states and 14595 transitions. [2020-10-27 05:33:25,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:33:25,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-27 05:33:25,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:25,436 INFO L225 Difference]: With dead ends: 9369 [2020-10-27 05:33:25,436 INFO L226 Difference]: Without dead ends: 6153 [2020-10-27 05:33:25,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:33:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6153 states. [2020-10-27 05:33:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6153 to 6150. [2020-10-27 05:33:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6150 states. [2020-10-27 05:33:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6150 states to 6150 states and 9523 transitions. [2020-10-27 05:33:26,600 INFO L78 Accepts]: Start accepts. Automaton has 6150 states and 9523 transitions. Word has length 111 [2020-10-27 05:33:26,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:26,601 INFO L481 AbstractCegarLoop]: Abstraction has 6150 states and 9523 transitions. [2020-10-27 05:33:26,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:33:26,601 INFO L276 IsEmpty]: Start isEmpty. Operand 6150 states and 9523 transitions. [2020-10-27 05:33:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 05:33:26,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:26,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:33:26,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:33:26,602 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:26,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:26,602 INFO L82 PathProgramCache]: Analyzing trace with hash -2098947681, now seen corresponding path program 1 times [2020-10-27 05:33:26,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:26,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639410646] [2020-10-27 05:33:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:26,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:26,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:26,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:26,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:27,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:27,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:29,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:31,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:31,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 05:33:31,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:33:31,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:33:31,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:33:31,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:31,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 05:33:31,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:32,111 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:33:32,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:32,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:32,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:32,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:32,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:32,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:33:32,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:32,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:32,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:32,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:32,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:32,219 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 05:33:32,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639410646] [2020-10-27 05:33:32,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:32,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:33:32,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236984358] [2020-10-27 05:33:32,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:33:32,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:32,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:33:32,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:33:32,222 INFO L87 Difference]: Start difference. First operand 6150 states and 9523 transitions. Second operand 6 states. [2020-10-27 05:33:32,749 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:33:34,548 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 05:33:36,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:36,012 INFO L93 Difference]: Finished difference Result 18199 states and 28252 transitions. [2020-10-27 05:33:36,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:33:36,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 112 [2020-10-27 05:33:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:36,038 INFO L225 Difference]: With dead ends: 18199 [2020-10-27 05:33:36,039 INFO L226 Difference]: Without dead ends: 12133 [2020-10-27 05:33:36,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:33:36,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12133 states. [2020-10-27 05:33:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12133 to 12130. [2020-10-27 05:33:38,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12130 states. [2020-10-27 05:33:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12130 states to 12130 states and 18774 transitions. [2020-10-27 05:33:38,242 INFO L78 Accepts]: Start accepts. Automaton has 12130 states and 18774 transitions. Word has length 112 [2020-10-27 05:33:38,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:38,242 INFO L481 AbstractCegarLoop]: Abstraction has 12130 states and 18774 transitions. [2020-10-27 05:33:38,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:33:38,242 INFO L276 IsEmpty]: Start isEmpty. Operand 12130 states and 18774 transitions. [2020-10-27 05:33:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 05:33:38,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:38,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:33:38,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:33:38,243 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:38,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:38,244 INFO L82 PathProgramCache]: Analyzing trace with hash 727525764, now seen corresponding path program 1 times [2020-10-27 05:33:38,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:38,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893327653] [2020-10-27 05:33:38,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:38,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:38,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:38,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:38,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:38,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:39,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:40,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:40,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 05:33:40,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:33:40,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2669 [2020-10-27 05:33:40,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:40,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:40,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 05:33:40,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:33:40,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:41,350 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:33:41,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:41,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:41,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:41,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:41,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:33:41,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:33:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:33:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:41,391 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 05:33:41,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893327653] [2020-10-27 05:33:41,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:41,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:33:41,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626363929] [2020-10-27 05:33:41,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:33:41,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:41,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:33:41,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:33:41,393 INFO L87 Difference]: Start difference. First operand 12130 states and 18774 transitions. Second operand 4 states. [2020-10-27 05:33:41,825 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:33:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:46,735 INFO L93 Difference]: Finished difference Result 34887 states and 53991 transitions. [2020-10-27 05:33:46,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:33:46,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-10-27 05:33:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:46,777 INFO L225 Difference]: With dead ends: 34887 [2020-10-27 05:33:46,777 INFO L226 Difference]: Without dead ends: 22849 [2020-10-27 05:33:46,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:33:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22849 states. [2020-10-27 05:33:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22849 to 22846. [2020-10-27 05:33:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22846 states. [2020-10-27 05:33:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22846 states to 22846 states and 35152 transitions. [2020-10-27 05:33:51,337 INFO L78 Accepts]: Start accepts. Automaton has 22846 states and 35152 transitions. Word has length 112 [2020-10-27 05:33:51,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:51,337 INFO L481 AbstractCegarLoop]: Abstraction has 22846 states and 35152 transitions. [2020-10-27 05:33:51,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:33:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 22846 states and 35152 transitions. [2020-10-27 05:33:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 05:33:51,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:51,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:33:51,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:33:51,339 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:51,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2034795072, now seen corresponding path program 1 times [2020-10-27 05:33:51,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:51,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007744481] [2020-10-27 05:33:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:51,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:51,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:51,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:51,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:51,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:52,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:56,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:56,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 05:33:56,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:33:56,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:33:56,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:56,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:33:56,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:56,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 05:33:56,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:56,822 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:33:56,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:56,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:56,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:56,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:56,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:56,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:33:56,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:56,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:56,875 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 05:33:56,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007744481] [2020-10-27 05:33:56,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:56,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:33:56,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148804560] [2020-10-27 05:33:56,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:33:56,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:56,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:33:56,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:33:56,877 INFO L87 Difference]: Start difference. First operand 22846 states and 35152 transitions. Second operand 6 states. [2020-10-27 05:33:57,320 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 05:34:00,057 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:34:06,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:06,584 INFO L93 Difference]: Finished difference Result 68165 states and 104899 transitions. [2020-10-27 05:34:06,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:34:06,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-10-27 05:34:06,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:06,650 INFO L225 Difference]: With dead ends: 68165 [2020-10-27 05:34:06,650 INFO L226 Difference]: Without dead ends: 45409 [2020-10-27 05:34:06,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:34:06,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45409 states. [2020-10-27 05:34:15,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45409 to 45406. [2020-10-27 05:34:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45406 states. [2020-10-27 05:34:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45406 states to 45406 states and 69679 transitions. [2020-10-27 05:34:15,889 INFO L78 Accepts]: Start accepts. Automaton has 45406 states and 69679 transitions. Word has length 113 [2020-10-27 05:34:15,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:15,889 INFO L481 AbstractCegarLoop]: Abstraction has 45406 states and 69679 transitions. [2020-10-27 05:34:15,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:34:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 45406 states and 69679 transitions. [2020-10-27 05:34:15,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 05:34:15,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:15,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:34:15,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:34:15,890 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:15,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:15,891 INFO L82 PathProgramCache]: Analyzing trace with hash -932787035, now seen corresponding path program 1 times [2020-10-27 05:34:15,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:15,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681772469] [2020-10-27 05:34:15,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:15,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:15,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:16,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:16,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:16,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:17,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:17,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 05:34:17,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:34:17,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1570 [2020-10-27 05:34:17,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:17,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:17,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 05:34:17,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:34:17,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:17,917 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:34:17,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:17,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:17,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:17,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:17,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:17,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:34:17,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:17,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:17,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:17,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:17,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:17,970 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 05:34:17,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681772469] [2020-10-27 05:34:17,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:17,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:34:17,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814558911] [2020-10-27 05:34:17,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:34:17,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:17,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:34:17,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:34:17,972 INFO L87 Difference]: Start difference. First operand 45406 states and 69679 transitions. Second operand 4 states. [2020-10-27 05:34:18,440 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-27 05:34:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:35,129 INFO L93 Difference]: Finished difference Result 130875 states and 200469 transitions. [2020-10-27 05:34:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:34:35,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-10-27 05:34:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:35,242 INFO L225 Difference]: With dead ends: 130875 [2020-10-27 05:34:35,242 INFO L226 Difference]: Without dead ends: 85567 [2020-10-27 05:34:35,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:34:35,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85567 states. [2020-10-27 05:34:51,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85567 to 85564. [2020-10-27 05:34:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85564 states. [2020-10-27 05:34:51,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85564 states to 85564 states and 130252 transitions. [2020-10-27 05:34:51,754 INFO L78 Accepts]: Start accepts. Automaton has 85564 states and 130252 transitions. Word has length 113 [2020-10-27 05:34:51,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:51,754 INFO L481 AbstractCegarLoop]: Abstraction has 85564 states and 130252 transitions. [2020-10-27 05:34:51,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:34:51,754 INFO L276 IsEmpty]: Start isEmpty. Operand 85564 states and 130252 transitions. [2020-10-27 05:34:51,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 05:34:51,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:51,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:34:51,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:34:51,756 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:51,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:51,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1857724007, now seen corresponding path program 1 times [2020-10-27 05:34:51,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:51,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621461998] [2020-10-27 05:34:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:51,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:51,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:51,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:52,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:52,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:52,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 05:34:52,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:34:52,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1044 [2020-10-27 05:34:52,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 05:34:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 05:34:52,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:53,243 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:34:53,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:53,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:53,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:53,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:53,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:53,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:34:53,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:53,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:53,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:53,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:53,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:53,289 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 05:34:53,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621461998] [2020-10-27 05:34:53,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:53,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:34:53,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924547020] [2020-10-27 05:34:53,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:34:53,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:53,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:34:53,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:34:53,291 INFO L87 Difference]: Start difference. First operand 85564 states and 130252 transitions. Second operand 4 states. [2020-10-27 05:34:53,734 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 227