/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_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 06:07:48,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 06:07:48,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 06:07:48,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 06:07:48,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 06:07:48,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 06:07:48,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 06:07:48,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 06:07:48,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 06:07:48,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 06:07:48,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 06:07:48,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 06:07:48,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 06:07:48,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 06:07:48,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 06:07:48,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 06:07:48,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 06:07:48,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 06:07:48,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 06:07:48,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 06:07:48,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 06:07:48,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 06:07:48,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 06:07:48,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 06:07:48,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 06:07:48,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 06:07:48,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 06:07:48,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 06:07:48,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 06:07:48,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 06:07:48,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 06:07:48,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 06:07:48,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 06:07:48,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 06:07:48,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 06:07:48,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 06:07:48,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 06:07:48,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 06:07:48,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 06:07:48,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 06:07:48,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 06:07:48,737 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 06:07:48,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 06:07:48,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 06:07:48,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 06:07:48,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 06:07:48,796 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 06:07:48,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 06:07:48,797 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 06:07:48,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 06:07:48,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 06:07:48,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 06:07:48,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 06:07:48,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 06:07:48,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 06:07:48,799 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 06:07:48,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 06:07:48,799 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 06:07:48,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 06:07:48,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 06:07:48,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 06:07:48,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 06:07:48,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 06:07:48,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:07:48,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 06:07:48,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 06:07:48,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 06:07:48,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 06:07:48,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 06:07:48,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 06:07:48,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 06:07:48,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 06:07:49,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 06:07:49,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 06:07:49,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 06:07:49,262 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 06:07:49,263 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 06:07:49,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 06:07:49,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0dd0e2a46/f4d46fb51cfe481c9ffb82be586550d3/FLAGcdeb76ad5 [2020-10-27 06:07:50,100 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 06:07:50,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 06:07:50,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0dd0e2a46/f4d46fb51cfe481c9ffb82be586550d3/FLAGcdeb76ad5 [2020-10-27 06:07:50,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0dd0e2a46/f4d46fb51cfe481c9ffb82be586550d3 [2020-10-27 06:07:50,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 06:07:50,385 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 06:07:50,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 06:07:50,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 06:07:50,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 06:07:50,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:07:50" (1/1) ... [2020-10-27 06:07:50,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fdbbe7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:50, skipping insertion in model container [2020-10-27 06:07:50,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:07:50" (1/1) ... [2020-10-27 06:07:50,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 06:07:50,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 06:07:51,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:07:51,048 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 06:07:51,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:07:51,265 INFO L208 MainTranslator]: Completed translation [2020-10-27 06:07:51,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:51 WrapperNode [2020-10-27 06:07:51,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 06:07:51,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 06:07:51,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 06:07:51,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 06:07:51,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:51" (1/1) ... [2020-10-27 06:07:51,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:51" (1/1) ... [2020-10-27 06:07:51,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:51" (1/1) ... [2020-10-27 06:07:51,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:51" (1/1) ... [2020-10-27 06:07:51,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:51" (1/1) ... [2020-10-27 06:07:51,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:51" (1/1) ... [2020-10-27 06:07:51,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:51" (1/1) ... [2020-10-27 06:07:51,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 06:07:51,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 06:07:51,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 06:07:51,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 06:07:51,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:51" (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 06:07:51,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 06:07:51,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 06:07:51,493 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 06:07:51,493 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 06:07:51,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 06:07:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 06:07:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 06:07:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 06:07:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 06:07:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 06:07:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 06:07:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 06:07:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 06:07:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 06:07:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 06:07:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 06:07:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 06:07:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 06:07:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 06:07:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 06:07:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 06:07:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 06:07:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 06:07:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 06:07:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 06:07:51,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 06:07:51,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 06:07:51,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 06:07:51,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 06:07:53,448 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 06:07:53,448 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 06:07:53,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:07:53 BoogieIcfgContainer [2020-10-27 06:07:53,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 06:07:53,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 06:07:53,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 06:07:53,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 06:07:53,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:07:50" (1/3) ... [2020-10-27 06:07:53,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7ee53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:07:53, skipping insertion in model container [2020-10-27 06:07:53,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:51" (2/3) ... [2020-10-27 06:07:53,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7ee53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:07:53, skipping insertion in model container [2020-10-27 06:07:53,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:07:53" (3/3) ... [2020-10-27 06:07:53,461 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 06:07:53,474 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 06:07:53,480 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 06:07:53,494 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 06:07:53,526 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 06:07:53,526 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 06:07:53,526 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 06:07:53,526 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 06:07:53,526 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 06:07:53,526 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 06:07:53,527 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 06:07:53,527 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 06:07:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states. [2020-10-27 06:07:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 06:07:53,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:07:53,574 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:07:53,575 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:07:53,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:07:53,581 INFO L82 PathProgramCache]: Analyzing trace with hash -59655128, now seen corresponding path program 1 times [2020-10-27 06:07:53,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:07:53,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142038118] [2020-10-27 06:07:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:07:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:07:54,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:07:54,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:07:54,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:07:56,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:07:56,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:07:59,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:07:59,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 06:07:59,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 06:07:59,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 06:07:59,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:07:59,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:07:59,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-27 06:07:59,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 06:07:59,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 06:08:00,511 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 289 [2020-10-27 06:08:00,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:08:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:08:00,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:00,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:08:00,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:08:00,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:08:00,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 06:08:00,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:08:00,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:08:00,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:08:00,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:08:00,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:08:00,643 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 06:08:00,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142038118] [2020-10-27 06:08:00,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:08:00,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:08:00,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186918978] [2020-10-27 06:08:00,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:08:00,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:08:00,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:08:00,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:08:00,678 INFO L87 Difference]: Start difference. First operand 360 states. Second operand 4 states. [2020-10-27 06:08:01,530 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-27 06:08:04,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:08:04,249 INFO L93 Difference]: Finished difference Result 668 states and 1145 transitions. [2020-10-27 06:08:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:08:04,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-10-27 06:08:04,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:08:04,288 INFO L225 Difference]: With dead ends: 668 [2020-10-27 06:08:04,288 INFO L226 Difference]: Without dead ends: 497 [2020-10-27 06:08:04,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:08:04,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-10-27 06:08:04,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 493. [2020-10-27 06:08:04,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-10-27 06:08:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 810 transitions. [2020-10-27 06:08:04,434 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 810 transitions. Word has length 123 [2020-10-27 06:08:04,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:08:04,435 INFO L481 AbstractCegarLoop]: Abstraction has 493 states and 810 transitions. [2020-10-27 06:08:04,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:08:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 810 transitions. [2020-10-27 06:08:04,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 06:08:04,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:08:04,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:08:04,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 06:08:04,442 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:08:04,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:08:04,443 INFO L82 PathProgramCache]: Analyzing trace with hash -515611600, now seen corresponding path program 1 times [2020-10-27 06:08:04,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:08:04,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914213757] [2020-10-27 06:08:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:08:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:08:04,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:04,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:04,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:05,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:05,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:09,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:09,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:09,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:08:09,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 06:08:09,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 06:08:09,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 06:08:09,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:08:09,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:08:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:08:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 06:08:09,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 06:08:10,396 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-27 06:08:10,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:08:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:08:10,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:10,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:08:10,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:08:10,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:08:10,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 06:08:10,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:08:10,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:08:10,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:08:10,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:08:10,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:08:10,510 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 06:08:10,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914213757] [2020-10-27 06:08:10,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:08:10,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:08:10,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491623420] [2020-10-27 06:08:10,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:08:10,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:08:10,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:08:10,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:08:10,515 INFO L87 Difference]: Start difference. First operand 493 states and 810 transitions. Second operand 5 states. [2020-10-27 06:08:13,541 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 06:08:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:08:13,749 INFO L93 Difference]: Finished difference Result 1440 states and 2369 transitions. [2020-10-27 06:08:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:08:13,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-27 06:08:13,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:08:13,760 INFO L225 Difference]: With dead ends: 1440 [2020-10-27 06:08:13,760 INFO L226 Difference]: Without dead ends: 960 [2020-10-27 06:08:13,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:08:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2020-10-27 06:08:13,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 957. [2020-10-27 06:08:13,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 957 states. [2020-10-27 06:08:13,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1566 transitions. [2020-10-27 06:08:13,860 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1566 transitions. Word has length 126 [2020-10-27 06:08:13,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:08:13,861 INFO L481 AbstractCegarLoop]: Abstraction has 957 states and 1566 transitions. [2020-10-27 06:08:13,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:08:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1566 transitions. [2020-10-27 06:08:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 06:08:13,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:08:13,867 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:08:13,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 06:08:13,867 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:08:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:08:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash -798900808, now seen corresponding path program 1 times [2020-10-27 06:08:13,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:08:13,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666364063] [2020-10-27 06:08:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:08:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:08:13,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:14,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:14,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:14,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:14,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:17,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:18,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:18,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:08:18,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 06:08:18,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 06:08:18,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-27 06:08:18,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:08:18,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:08:18,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:08:18,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 06:08:18,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:08:19,764 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-27 06:08:19,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:08:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:08:19,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:19,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:08:19,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:08:19,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:08:19,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 06:08:19,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:08:19,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:08:19,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:08:19,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:08:19,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:08:19,875 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 06:08:19,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666364063] [2020-10-27 06:08:19,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:08:19,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:08:19,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230912147] [2020-10-27 06:08:19,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:08:19,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:08:19,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:08:19,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:08:19,880 INFO L87 Difference]: Start difference. First operand 957 states and 1566 transitions. Second operand 5 states. [2020-10-27 06:08:23,108 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 06:08:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:08:23,374 INFO L93 Difference]: Finished difference Result 2803 states and 4587 transitions. [2020-10-27 06:08:23,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:08:23,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-10-27 06:08:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:08:23,393 INFO L225 Difference]: With dead ends: 2803 [2020-10-27 06:08:23,393 INFO L226 Difference]: Without dead ends: 1869 [2020-10-27 06:08:23,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:08:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2020-10-27 06:08:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1866. [2020-10-27 06:08:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1866 states. [2020-10-27 06:08:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 3036 transitions. [2020-10-27 06:08:23,518 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 3036 transitions. Word has length 127 [2020-10-27 06:08:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:08:23,520 INFO L481 AbstractCegarLoop]: Abstraction has 1866 states and 3036 transitions. [2020-10-27 06:08:23,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:08:23,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 3036 transitions. [2020-10-27 06:08:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 06:08:23,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:08:23,525 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:08:23,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 06:08:23,532 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:08:23,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:08:23,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1472648285, now seen corresponding path program 1 times [2020-10-27 06:08:23,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:08:23,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488188027] [2020-10-27 06:08:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:08:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:08:23,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:23,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:23,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:24,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:24,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:26,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:26,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:28,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:08:28,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 06:08:28,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 06:08:28,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-27 06:08:28,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:08:28,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:08:28,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:08:28,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 06:08:28,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:08:29,568 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-27 06:08:29,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:08:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:08:29,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:29,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:08:29,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:08:29,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:08:29,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 06:08:29,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:08:29,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:08:29,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:08:29,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:08:29,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:08:29,696 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 06:08:29,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488188027] [2020-10-27 06:08:29,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:08:29,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:08:29,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854855741] [2020-10-27 06:08:29,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:08:29,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:08:29,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:08:29,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:08:29,699 INFO L87 Difference]: Start difference. First operand 1866 states and 3036 transitions. Second operand 5 states. [2020-10-27 06:08:33,414 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 06:08:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:08:33,649 INFO L93 Difference]: Finished difference Result 5369 states and 8723 transitions. [2020-10-27 06:08:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:08:33,650 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-10-27 06:08:33,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:08:33,672 INFO L225 Difference]: With dead ends: 5369 [2020-10-27 06:08:33,672 INFO L226 Difference]: Without dead ends: 3658 [2020-10-27 06:08:33,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:08:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2020-10-27 06:08:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 3655. [2020-10-27 06:08:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3655 states. [2020-10-27 06:08:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 5919 transitions. [2020-10-27 06:08:33,938 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 5919 transitions. Word has length 128 [2020-10-27 06:08:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:08:33,939 INFO L481 AbstractCegarLoop]: Abstraction has 3655 states and 5919 transitions. [2020-10-27 06:08:33,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:08:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 5919 transitions. [2020-10-27 06:08:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 06:08:33,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:08:33,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:08:33,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 06:08:33,949 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:08:33,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:08:33,949 INFO L82 PathProgramCache]: Analyzing trace with hash 668806813, now seen corresponding path program 1 times [2020-10-27 06:08:33,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:08:33,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236036717] [2020-10-27 06:08:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:08:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:08:34,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:34,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:34,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:34,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:34,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:34,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:39,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:08:39,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 06:08:39,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:08:39,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 06:08:39,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:08:39,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:08:39,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:08:39,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 06:08:39,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:08:39,738 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-27 06:08:39,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:08:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:08:39,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:39,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:08:39,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:08:39,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:08:39,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 06:08:39,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:08:39,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:08:39,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:08:39,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:08:39,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:08:39,849 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 06:08:39,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236036717] [2020-10-27 06:08:39,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:08:39,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:08:39,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215472581] [2020-10-27 06:08:39,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:08:39,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:08:39,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:08:39,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:08:39,851 INFO L87 Difference]: Start difference. First operand 3655 states and 5919 transitions. Second operand 5 states. [2020-10-27 06:08:43,340 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 06:08:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:08:43,596 INFO L93 Difference]: Finished difference Result 10517 states and 17003 transitions. [2020-10-27 06:08:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:08:43,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-27 06:08:43,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:08:43,636 INFO L225 Difference]: With dead ends: 10517 [2020-10-27 06:08:43,636 INFO L226 Difference]: Without dead ends: 7098 [2020-10-27 06:08:43,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:08:43,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7098 states. [2020-10-27 06:08:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7098 to 7095. [2020-10-27 06:08:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7095 states. [2020-10-27 06:08:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7095 states to 7095 states and 11431 transitions. [2020-10-27 06:08:44,293 INFO L78 Accepts]: Start accepts. Automaton has 7095 states and 11431 transitions. Word has length 129 [2020-10-27 06:08:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:08:44,293 INFO L481 AbstractCegarLoop]: Abstraction has 7095 states and 11431 transitions. [2020-10-27 06:08:44,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:08:44,294 INFO L276 IsEmpty]: Start isEmpty. Operand 7095 states and 11431 transitions. [2020-10-27 06:08:44,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 06:08:44,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:08:44,313 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:08:44,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 06:08:44,314 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:08:44,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:08:44,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1213907244, now seen corresponding path program 1 times [2020-10-27 06:08:44,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:08:44,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533985334] [2020-10-27 06:08:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:08:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:08:44,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:44,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:44,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:44,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:44,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:45,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:45,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:49,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:08:49,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 06:08:49,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 06:08:49,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 06:08:49,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:08:49,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:08:49,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 06:08:49,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 06:08:49,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:08:50,046 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-27 06:08:50,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:08:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:08:50,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:50,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:08:50,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:08:50,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:08:50,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 06:08:50,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:08:50,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:08:50,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:08:50,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:08:50,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:08:50,133 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 06:08:50,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533985334] [2020-10-27 06:08:50,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:08:50,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:08:50,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573450495] [2020-10-27 06:08:50,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:08:50,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:08:50,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:08:50,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:08:50,135 INFO L87 Difference]: Start difference. First operand 7095 states and 11431 transitions. Second operand 4 states. [2020-10-27 06:08:50,868 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-27 06:08:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:08:53,769 INFO L93 Difference]: Finished difference Result 15421 states and 25131 transitions. [2020-10-27 06:08:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:08:53,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-10-27 06:08:53,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:08:53,836 INFO L225 Difference]: With dead ends: 15421 [2020-10-27 06:08:53,837 INFO L226 Difference]: Without dead ends: 11106 [2020-10-27 06:08:53,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:08:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11106 states. [2020-10-27 06:08:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11106 to 11071. [2020-10-27 06:08:54,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11071 states. [2020-10-27 06:08:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11071 states to 11071 states and 17919 transitions. [2020-10-27 06:08:54,978 INFO L78 Accepts]: Start accepts. Automaton has 11071 states and 17919 transitions. Word has length 129 [2020-10-27 06:08:54,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:08:54,979 INFO L481 AbstractCegarLoop]: Abstraction has 11071 states and 17919 transitions. [2020-10-27 06:08:54,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:08:54,979 INFO L276 IsEmpty]: Start isEmpty. Operand 11071 states and 17919 transitions. [2020-10-27 06:08:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 06:08:54,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:08:55,000 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:08:55,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 06:08:55,000 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:08:55,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:08:55,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2117133885, now seen corresponding path program 1 times [2020-10-27 06:08:55,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:08:55,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013015179] [2020-10-27 06:08:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:08:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:08:55,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:55,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:55,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:55,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:56,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:56,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:57,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:57,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:08:57,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:00,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:09:00,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 06:09:00,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 06:09:00,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 06:09:00,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:09:00,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:09:00,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:09:00,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 06:09:00,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:09:00,833 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-27 06:09:00,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:09:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:09:00,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:00,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:09:00,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:09:00,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:09:00,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 06:09:00,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:09:00,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:09:00,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:09:00,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:09:00,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:09:00,934 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 06:09:00,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013015179] [2020-10-27 06:09:00,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:09:00,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:09:00,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60782410] [2020-10-27 06:09:00,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:09:00,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:09:00,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:09:00,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:09:00,936 INFO L87 Difference]: Start difference. First operand 11071 states and 17919 transitions. Second operand 5 states. [2020-10-27 06:09:05,052 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 06:09:05,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:09:05,842 INFO L93 Difference]: Finished difference Result 32122 states and 51889 transitions. [2020-10-27 06:09:05,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:09:05,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-10-27 06:09:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:09:05,907 INFO L225 Difference]: With dead ends: 32122 [2020-10-27 06:09:05,907 INFO L226 Difference]: Without dead ends: 21623 [2020-10-27 06:09:05,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:09:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21623 states. [2020-10-27 06:09:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21623 to 21620. [2020-10-27 06:09:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21620 states. [2020-10-27 06:09:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21620 states to 21620 states and 34789 transitions. [2020-10-27 06:09:08,518 INFO L78 Accepts]: Start accepts. Automaton has 21620 states and 34789 transitions. Word has length 133 [2020-10-27 06:09:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:09:08,518 INFO L481 AbstractCegarLoop]: Abstraction has 21620 states and 34789 transitions. [2020-10-27 06:09:08,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:09:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 21620 states and 34789 transitions. [2020-10-27 06:09:08,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-27 06:09:08,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:09:08,559 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:09:08,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 06:09:08,559 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:09:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:09:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash 660947785, now seen corresponding path program 1 times [2020-10-27 06:09:08,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:09:08,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574968269] [2020-10-27 06:09:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:09:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:09:08,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:08,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:08,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:08,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:09,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:09,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:09,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:09,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:10,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:13,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:09:13,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 06:09:13,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 06:09:13,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 06:09:13,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:09:13,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:09:13,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:09:13,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 06:09:13,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:09:14,282 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-27 06:09:14,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:09:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:09:14,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:14,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:09:14,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:09:14,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:09:14,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:09:14,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:09:14,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:09:14,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:09:14,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:09:14,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:09:14,350 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 06:09:14,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574968269] [2020-10-27 06:09:14,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:09:14,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:09:14,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003519808] [2020-10-27 06:09:14,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:09:14,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:09:14,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:09:14,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:09:14,353 INFO L87 Difference]: Start difference. First operand 21620 states and 34789 transitions. Second operand 5 states. [2020-10-27 06:09:19,161 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 06:09:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:09:20,623 INFO L93 Difference]: Finished difference Result 63695 states and 102400 transitions. [2020-10-27 06:09:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:09:20,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-10-27 06:09:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:09:20,763 INFO L225 Difference]: With dead ends: 63695 [2020-10-27 06:09:20,764 INFO L226 Difference]: Without dead ends: 42239 [2020-10-27 06:09:20,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:09:20,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42239 states. [2020-10-27 06:09:24,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42239 to 42236. [2020-10-27 06:09:24,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42236 states. [2020-10-27 06:09:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42236 states to 42236 states and 67476 transitions. [2020-10-27 06:09:24,590 INFO L78 Accepts]: Start accepts. Automaton has 42236 states and 67476 transitions. Word has length 134 [2020-10-27 06:09:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:09:24,590 INFO L481 AbstractCegarLoop]: Abstraction has 42236 states and 67476 transitions. [2020-10-27 06:09:24,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:09:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 42236 states and 67476 transitions. [2020-10-27 06:09:24,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 06:09:24,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:09:24,649 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:09:24,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 06:09:24,650 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:09:24,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:09:24,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2084023984, now seen corresponding path program 1 times [2020-10-27 06:09:24,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:09:24,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767689837] [2020-10-27 06:09:24,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:09:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:09:24,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:24,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:24,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:25,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:25,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:25,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:26,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:26,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:26,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:29,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:09:29,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 06:09:29,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 06:09:29,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 06:09:29,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:09:29,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:09:29,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-27 06:09:29,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 06:09:29,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:09:30,352 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-27 06:09:30,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:09:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:09:30,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:30,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:09:30,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:09:30,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:09:30,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 06:09:30,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:09:30,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:09:30,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:09:30,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:09:30,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:09:30,407 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 06:09:30,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767689837] [2020-10-27 06:09:30,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:09:30,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:09:30,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108267724] [2020-10-27 06:09:30,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:09:30,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:09:30,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:09:30,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:09:30,410 INFO L87 Difference]: Start difference. First operand 42236 states and 67476 transitions. Second operand 4 states. [2020-10-27 06:09:31,095 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-27 06:09:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:09:38,349 INFO L93 Difference]: Finished difference Result 103170 states and 166296 transitions. [2020-10-27 06:09:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:09:38,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-10-27 06:09:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:09:38,532 INFO L225 Difference]: With dead ends: 103170 [2020-10-27 06:09:38,532 INFO L226 Difference]: Without dead ends: 71551 [2020-10-27 06:09:38,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:09:38,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71551 states. [2020-10-27 06:09:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71551 to 71292. [2020-10-27 06:09:44,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71292 states. [2020-10-27 06:09:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71292 states to 71292 states and 114196 transitions. [2020-10-27 06:09:44,736 INFO L78 Accepts]: Start accepts. Automaton has 71292 states and 114196 transitions. Word has length 135 [2020-10-27 06:09:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:09:44,736 INFO L481 AbstractCegarLoop]: Abstraction has 71292 states and 114196 transitions. [2020-10-27 06:09:44,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:09:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 71292 states and 114196 transitions. [2020-10-27 06:09:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 06:09:44,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:09:44,952 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, 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 06:09:44,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 06:09:44,953 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:09:44,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:09:44,953 INFO L82 PathProgramCache]: Analyzing trace with hash -30906664, now seen corresponding path program 1 times [2020-10-27 06:09:44,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:09:44,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100040988] [2020-10-27 06:09:44,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:09:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:09:45,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:45,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:45,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:45,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:45,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:45,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:45,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:45,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:48,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:48,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:48,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:50,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:09:50,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-27 06:09:50,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 06:09:50,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 06:09:50,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:09:50,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:09:50,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:09:50,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-27 06:09:50,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:09:50,800 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-27 06:09:50,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:09:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:09:50,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:09:50,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:09:50,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:09:50,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:09:50,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 06:09:50,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:09:50,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:09:50,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:09:50,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:09:50,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:09:50,886 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 06:09:50,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100040988] [2020-10-27 06:09:50,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:09:50,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:09:50,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963545116] [2020-10-27 06:09:50,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:09:50,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:09:50,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:09:50,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:09:50,888 INFO L87 Difference]: Start difference. First operand 71292 states and 114196 transitions. Second operand 5 states. [2020-10-27 06:09:58,144 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 06:10:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:10:05,980 INFO L93 Difference]: Finished difference Result 206709 states and 330400 transitions. [2020-10-27 06:10:05,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:10:05,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 138 [2020-10-27 06:10:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:10:06,458 INFO L225 Difference]: With dead ends: 206709 [2020-10-27 06:10:06,458 INFO L226 Difference]: Without dead ends: 138786 [2020-10-27 06:10:06,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:10:06,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138786 states. [2020-10-27 06:10:18,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138786 to 138783. [2020-10-27 06:10:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138783 states. [2020-10-27 06:10:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138783 states to 138783 states and 220864 transitions. [2020-10-27 06:10:19,472 INFO L78 Accepts]: Start accepts. Automaton has 138783 states and 220864 transitions. Word has length 138 [2020-10-27 06:10:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:10:19,472 INFO L481 AbstractCegarLoop]: Abstraction has 138783 states and 220864 transitions. [2020-10-27 06:10:19,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:10:19,472 INFO L276 IsEmpty]: Start isEmpty. Operand 138783 states and 220864 transitions. [2020-10-27 06:10:19,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 06:10:19,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:10:19,555 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, 1, 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 06:10:19,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 06:10:19,555 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:10:19,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:10:19,556 INFO L82 PathProgramCache]: Analyzing trace with hash -567739309, now seen corresponding path program 1 times [2020-10-27 06:10:19,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:10:19,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843260662] [2020-10-27 06:10:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:10:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:10:19,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:10:19,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:10:19,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:10:19,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:10:19,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:10:20,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:10:20,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:10:20,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:10:22,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:10:22,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:10:22,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:10:24,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:10:24,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 06:10:24,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 06:10:24,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 06:10:24,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:10:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:10:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:10:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 06:10:24,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:10:25,414 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-27 06:10:25,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:10:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:10:25,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:10:25,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:10:25,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:10:25,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:10:25,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 06:10:25,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:10:25,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:10:25,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:10:25,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:10:25,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:10:25,535 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 06:10:25,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843260662] [2020-10-27 06:10:25,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:10:25,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:10:25,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888679626] [2020-10-27 06:10:25,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:10:25,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:10:25,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:10:25,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:10:25,538 INFO L87 Difference]: Start difference. First operand 138783 states and 220864 transitions. Second operand 5 states. [2020-10-27 06:10:37,149 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 06:10:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:10:55,485 INFO L93 Difference]: Finished difference Result 405438 states and 644432 transitions. [2020-10-27 06:10:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:10:55,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-10-27 06:10:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:10:56,345 INFO L225 Difference]: With dead ends: 405438 [2020-10-27 06:10:56,345 INFO L226 Difference]: Without dead ends: 271035 [2020-10-27 06:10:56,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:10:56,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271035 states. [2020-10-27 06:11:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271035 to 271032. [2020-10-27 06:11:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271032 states.