/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:43:46,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:43:46,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:43:46,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:43:46,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:43:46,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:43:46,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:43:46,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:43:46,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:43:46,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:43:46,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:43:46,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:43:46,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:43:46,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:43:46,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:43:46,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:43:46,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:43:46,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:43:46,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:43:46,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:43:46,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:43:46,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:43:46,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:43:46,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:43:46,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:43:46,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:43:46,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:43:46,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:43:46,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:43:46,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:43:46,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:43:46,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:43:46,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:43:46,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:43:46,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:43:46,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:43:46,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:43:46,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:43:46,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:43:46,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:43:46,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:43:46,419 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 [2020-10-29 13:43:46,452 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:43:46,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:43:46,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:43:46,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:43:46,455 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:43:46,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:43:46,455 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:43:46,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:43:46,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:43:46,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:43:46,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:43:46,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:43:46,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:43:46,456 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:43:46,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:43:46,457 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:43:46,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:43:46,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:43:46,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:43:46,458 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:43:46,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:43:46,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:43:46,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:43:46,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:43:46,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:43:46,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:43:46,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:43:46,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:43:46,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:43:46,460 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:43:46,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:43:46,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:43:46,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:43:46,851 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:43:46,852 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:43:46,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:43:46,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea22e9ba1/05876cce45214b7290166f01d69d2735/FLAG5ff695a6e [2020-10-29 13:43:47,591 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:43:47,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:43:47,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea22e9ba1/05876cce45214b7290166f01d69d2735/FLAG5ff695a6e [2020-10-29 13:43:47,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea22e9ba1/05876cce45214b7290166f01d69d2735 [2020-10-29 13:43:47,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:43:47,930 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:43:47,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:43:47,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:43:47,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:43:47,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:43:47" (1/1) ... [2020-10-29 13:43:47,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489d5778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:47, skipping insertion in model container [2020-10-29 13:43:47,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:43:47" (1/1) ... [2020-10-29 13:43:47,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:43:48,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:43:48,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:43:48,390 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:43:48,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:43:48,520 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:43:48,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:48 WrapperNode [2020-10-29 13:43:48,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:43:48,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:43:48,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:43:48,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:43:48,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:48" (1/1) ... [2020-10-29 13:43:48,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:48" (1/1) ... [2020-10-29 13:43:48,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:48" (1/1) ... [2020-10-29 13:43:48,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:48" (1/1) ... [2020-10-29 13:43:48,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:48" (1/1) ... [2020-10-29 13:43:48,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:48" (1/1) ... [2020-10-29 13:43:48,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:48" (1/1) ... [2020-10-29 13:43:48,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:43:48,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:43:48,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:43:48,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:43:48,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:48" (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 [2020-10-29 13:43:48,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:43:48,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:43:48,697 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:43:48,697 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:43:48,697 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:43:48,697 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:43:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:43:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:43:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:43:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:43:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:43:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:43:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:43:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:43:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:43:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:43:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:43:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:43:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:43:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:43:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:43:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:43:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:43:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:43:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:43:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:43:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:43:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:43:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:43:49,727 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:43:49,727 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:43:49,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:43:49 BoogieIcfgContainer [2020-10-29 13:43:49,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:43:49,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:43:49,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:43:49,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:43:49,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:43:47" (1/3) ... [2020-10-29 13:43:49,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad0c9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:43:49, skipping insertion in model container [2020-10-29 13:43:49,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:48" (2/3) ... [2020-10-29 13:43:49,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad0c9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:43:49, skipping insertion in model container [2020-10-29 13:43:49,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:43:49" (3/3) ... [2020-10-29 13:43:49,740 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:43:49,754 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:43:49,761 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:43:49,777 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:43:49,809 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:43:49,810 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:43:49,810 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:43:49,810 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:43:49,810 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:43:49,811 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:43:49,811 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:43:49,811 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:43:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states. [2020-10-29 13:43:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:43:49,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:49,849 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] [2020-10-29 13:43:49,849 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:49,857 INFO L82 PathProgramCache]: Analyzing trace with hash 615784456, now seen corresponding path program 1 times [2020-10-29 13:43:49,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:49,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526764536] [2020-10-29 13:43:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:50,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:50,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:51,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:53,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:53,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:43:53,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:43:53,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3423 [2020-10-29 13:43:53,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:53,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:53,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:43:53,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:43:53,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:43:53,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 13:43:54,012 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:43:54,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:54,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:54,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:54,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:54,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:54,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:43:54,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:54,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:54,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:54,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:54,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:54,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:43:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:54,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526764536] [2020-10-29 13:43:54,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:54,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:43:54,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405034085] [2020-10-29 13:43:54,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:43:54,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:54,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:43:54,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:43:54,172 INFO L87 Difference]: Start difference. First operand 188 states. Second operand 7 states. [2020-10-29 13:43:54,513 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:43:55,616 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:43:55,853 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:43:56,117 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:43:56,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:56,482 INFO L93 Difference]: Finished difference Result 658 states and 1058 transitions. [2020-10-29 13:43:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:43:56,484 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-29 13:43:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:56,504 INFO L225 Difference]: With dead ends: 658 [2020-10-29 13:43:56,504 INFO L226 Difference]: Without dead ends: 549 [2020-10-29 13:43:56,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:43:56,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-29 13:43:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 279. [2020-10-29 13:43:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-29 13:43:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 418 transitions. [2020-10-29 13:43:56,639 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 418 transitions. Word has length 69 [2020-10-29 13:43:56,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:56,641 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 418 transitions. [2020-10-29 13:43:56,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:43:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 418 transitions. [2020-10-29 13:43:56,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:43:56,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:56,648 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] [2020-10-29 13:43:56,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:43:56,648 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:56,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:56,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1851022144, now seen corresponding path program 1 times [2020-10-29 13:43:56,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:56,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715333251] [2020-10-29 13:43:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:56,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:56,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:57,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:57,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:43:57,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:43:57,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-29 13:43:57,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:57,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:57,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:43:57,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:43:57,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:43:57,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:58,036 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:43:58,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:58,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:58,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:58,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:58,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:58,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:43:58,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:58,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:58,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:58,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:58,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:58,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:43:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:58,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715333251] [2020-10-29 13:43:58,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:58,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:43:58,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865953413] [2020-10-29 13:43:58,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:43:58,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:58,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:43:58,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:43:58,126 INFO L87 Difference]: Start difference. First operand 279 states and 418 transitions. Second operand 7 states. [2020-10-29 13:43:59,058 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:43:59,300 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:43:59,537 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:43:59,795 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:44:00,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:00,592 INFO L93 Difference]: Finished difference Result 1021 states and 1574 transitions. [2020-10-29 13:44:00,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:44:00,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-29 13:44:00,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:00,601 INFO L225 Difference]: With dead ends: 1021 [2020-10-29 13:44:00,601 INFO L226 Difference]: Without dead ends: 808 [2020-10-29 13:44:00,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:44:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2020-10-29 13:44:00,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 799. [2020-10-29 13:44:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2020-10-29 13:44:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1223 transitions. [2020-10-29 13:44:00,699 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1223 transitions. Word has length 70 [2020-10-29 13:44:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:00,700 INFO L481 AbstractCegarLoop]: Abstraction has 799 states and 1223 transitions. [2020-10-29 13:44:00,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:44:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1223 transitions. [2020-10-29 13:44:00,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:44:00,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:00,704 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] [2020-10-29 13:44:00,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:44:00,704 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:00,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:00,705 INFO L82 PathProgramCache]: Analyzing trace with hash 842285149, now seen corresponding path program 1 times [2020-10-29 13:44:00,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:00,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095580370] [2020-10-29 13:44:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:00,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:00,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:01,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:01,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:44:01,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:44:01,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-10-29 13:44:01,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:01,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:01,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:01,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:01,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:44:01,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:01,716 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:01,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:01,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:01,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:01,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:01,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:01,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:44:01,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:01,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:01,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:01,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:01,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:01,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:01,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095580370] [2020-10-29 13:44:01,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:01,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:01,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273188280] [2020-10-29 13:44:01,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:01,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:01,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:01,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:01,786 INFO L87 Difference]: Start difference. First operand 799 states and 1223 transitions. Second operand 6 states. [2020-10-29 13:44:02,075 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:02,799 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:44:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:03,319 INFO L93 Difference]: Finished difference Result 2078 states and 3226 transitions. [2020-10-29 13:44:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:44:03,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-29 13:44:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:03,334 INFO L225 Difference]: With dead ends: 2078 [2020-10-29 13:44:03,334 INFO L226 Difference]: Without dead ends: 1356 [2020-10-29 13:44:03,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:44:03,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2020-10-29 13:44:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1353. [2020-10-29 13:44:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1353 states. [2020-10-29 13:44:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2085 transitions. [2020-10-29 13:44:03,463 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2085 transitions. Word has length 71 [2020-10-29 13:44:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:03,463 INFO L481 AbstractCegarLoop]: Abstraction has 1353 states and 2085 transitions. [2020-10-29 13:44:03,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:44:03,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2085 transitions. [2020-10-29 13:44:03,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:44:03,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:03,466 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] [2020-10-29 13:44:03,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:44:03,467 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:03,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:03,467 INFO L82 PathProgramCache]: Analyzing trace with hash -737353172, now seen corresponding path program 1 times [2020-10-29 13:44:03,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:03,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724251130] [2020-10-29 13:44:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:03,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:03,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:04,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:04,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:44:04,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:44:04,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-29 13:44:04,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:04,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:44:04,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:04,298 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:04,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:04,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:04,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:04,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:04,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:04,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:44:04,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:04,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:04,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:04,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:04,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:04,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:04,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724251130] [2020-10-29 13:44:04,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:04,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:04,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779238335] [2020-10-29 13:44:04,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:04,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:04,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:04,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:04,389 INFO L87 Difference]: Start difference. First operand 1353 states and 2085 transitions. Second operand 6 states. [2020-10-29 13:44:04,667 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:05,301 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:44:05,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:05,953 INFO L93 Difference]: Finished difference Result 3655 states and 5697 transitions. [2020-10-29 13:44:05,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:44:05,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-29 13:44:05,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:05,970 INFO L225 Difference]: With dead ends: 3655 [2020-10-29 13:44:05,970 INFO L226 Difference]: Without dead ends: 2406 [2020-10-29 13:44:05,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:44:05,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2020-10-29 13:44:06,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2403. [2020-10-29 13:44:06,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2403 states. [2020-10-29 13:44:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 3721 transitions. [2020-10-29 13:44:06,151 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 3721 transitions. Word has length 71 [2020-10-29 13:44:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:06,154 INFO L481 AbstractCegarLoop]: Abstraction has 2403 states and 3721 transitions. [2020-10-29 13:44:06,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:44:06,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 3721 transitions. [2020-10-29 13:44:06,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:44:06,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:06,157 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] [2020-10-29 13:44:06,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:44:06,158 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:06,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:06,158 INFO L82 PathProgramCache]: Analyzing trace with hash 836670094, now seen corresponding path program 1 times [2020-10-29 13:44:06,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:06,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653851191] [2020-10-29 13:44:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:06,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:06,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:06,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:06,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:44:06,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:44:06,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-29 13:44:06,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:06,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:06,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:06,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:44:06,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:07,134 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:07,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:07,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:07,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:07,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:07,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:07,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:44:07,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:07,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:07,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:07,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:07,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:07,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:07,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653851191] [2020-10-29 13:44:07,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:07,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:07,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621234497] [2020-10-29 13:44:07,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:07,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:07,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:07,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:07,202 INFO L87 Difference]: Start difference. First operand 2403 states and 3721 transitions. Second operand 6 states. [2020-10-29 13:44:07,494 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:44:08,232 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:08,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:08,973 INFO L93 Difference]: Finished difference Result 6915 states and 10743 transitions. [2020-10-29 13:44:08,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:44:08,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-29 13:44:08,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:09,000 INFO L225 Difference]: With dead ends: 6915 [2020-10-29 13:44:09,000 INFO L226 Difference]: Without dead ends: 4566 [2020-10-29 13:44:09,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:44:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2020-10-29 13:44:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4563. [2020-10-29 13:44:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4563 states. [2020-10-29 13:44:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 7034 transitions. [2020-10-29 13:44:09,440 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 7034 transitions. Word has length 71 [2020-10-29 13:44:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:09,441 INFO L481 AbstractCegarLoop]: Abstraction has 4563 states and 7034 transitions. [2020-10-29 13:44:09,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:44:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 7034 transitions. [2020-10-29 13:44:09,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:44:09,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:09,449 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] [2020-10-29 13:44:09,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:44:09,450 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:09,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:09,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1432119105, now seen corresponding path program 1 times [2020-10-29 13:44:09,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:09,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779712083] [2020-10-29 13:44:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:09,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:09,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:10,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:10,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:44:10,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:44:10,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-29 13:44:10,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:10,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:10,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:10,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:10,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 13:44:10,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:10,499 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:10,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:10,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:10,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:10,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:10,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:10,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:44:10,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:10,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:10,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:10,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:10,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:10,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:10,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779712083] [2020-10-29 13:44:10,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:10,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:10,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755729951] [2020-10-29 13:44:10,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:10,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:10,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:10,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:10,582 INFO L87 Difference]: Start difference. First operand 4563 states and 7034 transitions. Second operand 6 states. [2020-10-29 13:44:10,885 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:44:11,629 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:44:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:12,461 INFO L93 Difference]: Finished difference Result 13303 states and 20521 transitions. [2020-10-29 13:44:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:44:12,461 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-29 13:44:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:12,507 INFO L225 Difference]: With dead ends: 13303 [2020-10-29 13:44:12,508 INFO L226 Difference]: Without dead ends: 8778 [2020-10-29 13:44:12,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:44:12,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8778 states. [2020-10-29 13:44:13,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8778 to 8775. [2020-10-29 13:44:13,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8775 states. [2020-10-29 13:44:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8775 states to 8775 states and 13413 transitions. [2020-10-29 13:44:13,259 INFO L78 Accepts]: Start accepts. Automaton has 8775 states and 13413 transitions. Word has length 71 [2020-10-29 13:44:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:13,259 INFO L481 AbstractCegarLoop]: Abstraction has 8775 states and 13413 transitions. [2020-10-29 13:44:13,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:44:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 8775 states and 13413 transitions. [2020-10-29 13:44:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:44:13,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:13,263 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] [2020-10-29 13:44:13,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:44:13,264 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:13,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1571267093, now seen corresponding path program 1 times [2020-10-29 13:44:13,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:13,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571188942] [2020-10-29 13:44:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:13,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:13,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:13,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:15,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:15,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:44:15,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:44:15,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1758 [2020-10-29 13:44:15,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:15,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:15,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:44:15,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:44:15,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:44:15,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:15,589 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:15,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:15,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:15,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:15,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:15,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:15,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:44:15,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:15,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:15,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:15,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:15,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:15,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571188942] [2020-10-29 13:44:15,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:15,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:44:15,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537895194] [2020-10-29 13:44:15,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:44:15,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:15,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:44:15,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:44:15,654 INFO L87 Difference]: Start difference. First operand 8775 states and 13413 transitions. Second operand 9 states. [2020-10-29 13:44:15,974 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:44:17,445 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:17,710 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:44:21,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:21,352 INFO L93 Difference]: Finished difference Result 43216 states and 65704 transitions. [2020-10-29 13:44:21,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:44:21,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:44:21,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:21,498 INFO L225 Difference]: With dead ends: 43216 [2020-10-29 13:44:21,498 INFO L226 Difference]: Without dead ends: 39830 [2020-10-29 13:44:21,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-10-29 13:44:21,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39830 states. [2020-10-29 13:44:22,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39830 to 8943. [2020-10-29 13:44:22,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8943 states. [2020-10-29 13:44:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8943 states to 8943 states and 13645 transitions. [2020-10-29 13:44:22,841 INFO L78 Accepts]: Start accepts. Automaton has 8943 states and 13645 transitions. Word has length 72 [2020-10-29 13:44:22,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:22,842 INFO L481 AbstractCegarLoop]: Abstraction has 8943 states and 13645 transitions. [2020-10-29 13:44:22,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:44:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 8943 states and 13645 transitions. [2020-10-29 13:44:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:44:22,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:22,846 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] [2020-10-29 13:44:22,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:44:22,846 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1636810357, now seen corresponding path program 1 times [2020-10-29 13:44:22,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:22,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427876872] [2020-10-29 13:44:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:22,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:22,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:23,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:25,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:25,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:44:25,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:44:25,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2224 [2020-10-29 13:44:25,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:25,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:44:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:44:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:44:25,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:25,510 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:25,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:25,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:25,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:25,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:25,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:25,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:44:25,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:25,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:25,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:25,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:25,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:25,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427876872] [2020-10-29 13:44:25,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:25,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:44:25,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125765889] [2020-10-29 13:44:25,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:44:25,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:25,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:44:25,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:44:25,573 INFO L87 Difference]: Start difference. First operand 8943 states and 13645 transitions. Second operand 9 states. [2020-10-29 13:44:25,887 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:44:27,534 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:27,839 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:44:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:32,433 INFO L93 Difference]: Finished difference Result 37615 states and 57249 transitions. [2020-10-29 13:44:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 13:44:32,433 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:44:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:32,526 INFO L225 Difference]: With dead ends: 37615 [2020-10-29 13:44:32,526 INFO L226 Difference]: Without dead ends: 36341 [2020-10-29 13:44:32,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-10-29 13:44:32,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36341 states. [2020-10-29 13:44:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36341 to 8890. [2020-10-29 13:44:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8890 states. [2020-10-29 13:44:33,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8890 states to 8890 states and 13563 transitions. [2020-10-29 13:44:33,695 INFO L78 Accepts]: Start accepts. Automaton has 8890 states and 13563 transitions. Word has length 72 [2020-10-29 13:44:33,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:33,695 INFO L481 AbstractCegarLoop]: Abstraction has 8890 states and 13563 transitions. [2020-10-29 13:44:33,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:44:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 8890 states and 13563 transitions. [2020-10-29 13:44:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:44:33,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:33,699 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] [2020-10-29 13:44:33,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:44:33,699 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:33,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1277999691, now seen corresponding path program 1 times [2020-10-29 13:44:33,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:33,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332355559] [2020-10-29 13:44:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:33,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:33,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:35,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:35,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:44:35,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:44:35,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2012 [2020-10-29 13:44:35,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:35,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:35,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:44:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:44:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:44:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:36,287 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:36,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:36,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:36,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:36,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:36,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:36,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:44:36,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:36,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:36,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:36,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:36,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:36,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:36,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332355559] [2020-10-29 13:44:36,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:36,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:44:36,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297540640] [2020-10-29 13:44:36,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:44:36,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:36,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:44:36,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:44:36,333 INFO L87 Difference]: Start difference. First operand 8890 states and 13563 transitions. Second operand 9 states. [2020-10-29 13:44:36,624 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:44:38,443 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:38,745 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:44:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:44,615 INFO L93 Difference]: Finished difference Result 50504 states and 77092 transitions. [2020-10-29 13:44:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:44:44,616 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:44:44,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:44,738 INFO L225 Difference]: With dead ends: 50504 [2020-10-29 13:44:44,738 INFO L226 Difference]: Without dead ends: 44003 [2020-10-29 13:44:44,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-10-29 13:44:44,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44003 states. [2020-10-29 13:44:46,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44003 to 9063. [2020-10-29 13:44:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9063 states. [2020-10-29 13:44:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9063 states to 9063 states and 13782 transitions. [2020-10-29 13:44:46,192 INFO L78 Accepts]: Start accepts. Automaton has 9063 states and 13782 transitions. Word has length 72 [2020-10-29 13:44:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:46,193 INFO L481 AbstractCegarLoop]: Abstraction has 9063 states and 13782 transitions. [2020-10-29 13:44:46,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:44:46,193 INFO L276 IsEmpty]: Start isEmpty. Operand 9063 states and 13782 transitions. [2020-10-29 13:44:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:44:46,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:46,196 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] [2020-10-29 13:44:46,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:44:46,197 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:46,197 INFO L82 PathProgramCache]: Analyzing trace with hash -93673131, now seen corresponding path program 1 times [2020-10-29 13:44:46,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:46,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818236283] [2020-10-29 13:44:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:46,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:46,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:46,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:48,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:48,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:44:48,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:44:48,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1903 [2020-10-29 13:44:48,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:48,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:48,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:44:48,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:44:48,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:44:48,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:48,622 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:48,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:48,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:48,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:48,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:48,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:48,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:44:48,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:48,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:48,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:48,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:48,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:48,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:48,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818236283] [2020-10-29 13:44:48,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:48,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:44:48,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741094000] [2020-10-29 13:44:48,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:44:48,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:48,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:44:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:44:48,666 INFO L87 Difference]: Start difference. First operand 9063 states and 13782 transitions. Second operand 9 states. [2020-10-29 13:44:49,169 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:44:51,144 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:51,438 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:44:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:58,340 INFO L93 Difference]: Finished difference Result 48541 states and 73855 transitions. [2020-10-29 13:44:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:44:58,341 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:44:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:58,427 INFO L225 Difference]: With dead ends: 48541 [2020-10-29 13:44:58,428 INFO L226 Difference]: Without dead ends: 40173 [2020-10-29 13:44:58,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-10-29 13:44:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40173 states. [2020-10-29 13:45:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40173 to 9185. [2020-10-29 13:45:00,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9185 states. [2020-10-29 13:45:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9185 states to 9185 states and 13914 transitions. [2020-10-29 13:45:00,487 INFO L78 Accepts]: Start accepts. Automaton has 9185 states and 13914 transitions. Word has length 72 [2020-10-29 13:45:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:00,487 INFO L481 AbstractCegarLoop]: Abstraction has 9185 states and 13914 transitions. [2020-10-29 13:45:00,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:45:00,487 INFO L276 IsEmpty]: Start isEmpty. Operand 9185 states and 13914 transitions. [2020-10-29 13:45:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:45:00,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:00,491 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] [2020-10-29 13:45:00,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:45:00,492 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:00,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:00,492 INFO L82 PathProgramCache]: Analyzing trace with hash -762836791, now seen corresponding path program 1 times [2020-10-29 13:45:00,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:00,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919619614] [2020-10-29 13:45:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:00,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:00,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:00,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:45:00,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:00,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-29 13:45:00,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:00,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:00,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:45:00,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-29 13:45:00,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:45:00,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:00,964 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:45:00,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:00,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:00,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:00,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:00,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:00,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:45:00,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:00,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:00,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:00,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:00,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:00,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:45:00,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919619614] [2020-10-29 13:45:00,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:00,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:45:00,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494284108] [2020-10-29 13:45:00,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:45:00,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:00,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:45:00,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:45:00,998 INFO L87 Difference]: Start difference. First operand 9185 states and 13914 transitions. Second operand 5 states. [2020-10-29 13:45:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:04,178 INFO L93 Difference]: Finished difference Result 17556 states and 26652 transitions. [2020-10-29 13:45:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:45:04,178 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-29 13:45:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:04,214 INFO L225 Difference]: With dead ends: 17556 [2020-10-29 13:45:04,214 INFO L226 Difference]: Without dead ends: 17553 [2020-10-29 13:45:04,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:45:04,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17553 states. [2020-10-29 13:45:05,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17553 to 9441. [2020-10-29 13:45:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9441 states. [2020-10-29 13:45:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9441 states to 9441 states and 14170 transitions. [2020-10-29 13:45:05,746 INFO L78 Accepts]: Start accepts. Automaton has 9441 states and 14170 transitions. Word has length 73 [2020-10-29 13:45:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:05,746 INFO L481 AbstractCegarLoop]: Abstraction has 9441 states and 14170 transitions. [2020-10-29 13:45:05,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:45:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 9441 states and 14170 transitions. [2020-10-29 13:45:05,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:45:05,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:05,750 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] [2020-10-29 13:45:05,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:45:05,751 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:05,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:05,751 INFO L82 PathProgramCache]: Analyzing trace with hash -314718147, now seen corresponding path program 1 times [2020-10-29 13:45:05,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:05,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481694878] [2020-10-29 13:45:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:05,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:05,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:06,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:07,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:07,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:45:07,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:45:07,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1959 [2020-10-29 13:45:07,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:07,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:07,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:45:07,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:45:07,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:45:07,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:08,106 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:45:08,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:08,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:08,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:08,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:08,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:08,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:45:08,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:08,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:08,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:08,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:08,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:08,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:45:08,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481694878] [2020-10-29 13:45:08,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:08,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:45:08,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118312126] [2020-10-29 13:45:08,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:45:08,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:08,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:45:08,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:45:08,147 INFO L87 Difference]: Start difference. First operand 9441 states and 14170 transitions. Second operand 7 states. [2020-10-29 13:45:08,427 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:45:09,409 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:45:09,658 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:45:10,006 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:45:10,274 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:45:10,544 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:45:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:14,439 INFO L93 Difference]: Finished difference Result 29625 states and 45122 transitions. [2020-10-29 13:45:14,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:45:14,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-29 13:45:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:14,475 INFO L225 Difference]: With dead ends: 29625 [2020-10-29 13:45:14,475 INFO L226 Difference]: Without dead ends: 25438 [2020-10-29 13:45:14,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:45:14,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25438 states. [2020-10-29 13:45:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25438 to 14560. [2020-10-29 13:45:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14560 states. [2020-10-29 13:45:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14560 states to 14560 states and 21945 transitions. [2020-10-29 13:45:16,916 INFO L78 Accepts]: Start accepts. Automaton has 14560 states and 21945 transitions. Word has length 74 [2020-10-29 13:45:16,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:16,916 INFO L481 AbstractCegarLoop]: Abstraction has 14560 states and 21945 transitions. [2020-10-29 13:45:16,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:45:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 14560 states and 21945 transitions. [2020-10-29 13:45:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:45:16,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:16,921 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] [2020-10-29 13:45:16,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:45:16,921 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:16,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2131398602, now seen corresponding path program 1 times [2020-10-29 13:45:16,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:16,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717296528] [2020-10-29 13:45:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:16,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:17,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:17,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:45:17,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:17,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-29 13:45:17,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:17,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:17,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:45:17,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:45:17,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:45:17,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:17,367 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:45:17,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:17,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:17,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:17,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:17,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:17,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:45:17,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:17,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:17,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:17,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:17,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:17,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:45:17,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717296528] [2020-10-29 13:45:17,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:17,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:45:17,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317369313] [2020-10-29 13:45:17,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:45:17,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:17,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:45:17,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:45:17,415 INFO L87 Difference]: Start difference. First operand 14560 states and 21945 transitions. Second operand 5 states. [2020-10-29 13:45:17,712 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:45:18,544 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:45:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:22,865 INFO L93 Difference]: Finished difference Result 39286 states and 59269 transitions. [2020-10-29 13:45:22,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:45:22,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-29 13:45:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:22,906 INFO L225 Difference]: With dead ends: 39286 [2020-10-29 13:45:22,906 INFO L226 Difference]: Without dead ends: 25803 [2020-10-29 13:45:22,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:45:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25803 states. [2020-10-29 13:45:27,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25803 to 25608. [2020-10-29 13:45:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25608 states. [2020-10-29 13:45:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25608 states to 25608 states and 38241 transitions. [2020-10-29 13:45:27,277 INFO L78 Accepts]: Start accepts. Automaton has 25608 states and 38241 transitions. Word has length 74 [2020-10-29 13:45:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:27,278 INFO L481 AbstractCegarLoop]: Abstraction has 25608 states and 38241 transitions. [2020-10-29 13:45:27,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:45:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 25608 states and 38241 transitions. [2020-10-29 13:45:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:45:27,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:27,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:27,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:45:27,283 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:27,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:27,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1085675365, now seen corresponding path program 1 times [2020-10-29 13:45:27,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:27,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755502027] [2020-10-29 13:45:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:27,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:27,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:28,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:29,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:29,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:45:29,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:45:29,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1960 [2020-10-29 13:45:29,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:29,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:29,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:45:29,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:45:29,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:45:29,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:29,692 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:45:29,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:29,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:29,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:29,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:29,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:29,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:45:29,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:29,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:29,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:29,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:29,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:29,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:45:29,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755502027] [2020-10-29 13:45:29,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:29,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:45:29,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768676371] [2020-10-29 13:45:29,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:45:29,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:29,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:45:29,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:45:29,734 INFO L87 Difference]: Start difference. First operand 25608 states and 38241 transitions. Second operand 7 states. [2020-10-29 13:45:30,087 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:45:31,174 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:45:31,567 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:45:36,608 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:45:36,908 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:45:37,198 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:45:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:39,619 INFO L93 Difference]: Finished difference Result 55623 states and 83404 transitions. [2020-10-29 13:45:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:45:39,620 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-29 13:45:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:39,674 INFO L225 Difference]: With dead ends: 55623 [2020-10-29 13:45:39,675 INFO L226 Difference]: Without dead ends: 43876 [2020-10-29 13:45:39,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:45:39,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43876 states. [2020-10-29 13:45:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43876 to 29193. [2020-10-29 13:45:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29193 states. [2020-10-29 13:45:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29193 states to 29193 states and 43567 transitions. [2020-10-29 13:45:45,030 INFO L78 Accepts]: Start accepts. Automaton has 29193 states and 43567 transitions. Word has length 74 [2020-10-29 13:45:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:45,031 INFO L481 AbstractCegarLoop]: Abstraction has 29193 states and 43567 transitions. [2020-10-29 13:45:45,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:45:45,031 INFO L276 IsEmpty]: Start isEmpty. Operand 29193 states and 43567 transitions. [2020-10-29 13:45:45,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:45:45,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:45,039 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] [2020-10-29 13:45:45,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:45:45,039 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:45,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:45,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1012120549, now seen corresponding path program 1 times [2020-10-29 13:45:45,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:45,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861461240] [2020-10-29 13:45:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:45,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:45,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:45,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:46,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:46,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:45:46,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:45:46,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1769 [2020-10-29 13:45:46,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:46,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:46,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:45:46,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:45:46,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:45:46,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:47,123 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:45:47,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:47,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:47,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:47,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:47,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:47,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:45:47,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:47,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:47,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:47,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:47,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:47,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:45:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:45:47,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861461240] [2020-10-29 13:45:47,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:47,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:45:47,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8764723] [2020-10-29 13:45:47,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:45:47,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:47,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:45:47,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:45:47,180 INFO L87 Difference]: Start difference. First operand 29193 states and 43567 transitions. Second operand 7 states. [2020-10-29 13:45:47,539 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:45:48,660 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:45:49,212 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:45:55,304 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:45:55,609 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:45:55,912 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:45:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:58,891 INFO L93 Difference]: Finished difference Result 59414 states and 88852 transitions. [2020-10-29 13:45:58,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:45:58,892 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-29 13:45:58,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:58,963 INFO L225 Difference]: With dead ends: 59414 [2020-10-29 13:45:58,963 INFO L226 Difference]: Without dead ends: 51059 [2020-10-29 13:45:58,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:45:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51059 states. [2020-10-29 13:46:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51059 to 33493. [2020-10-29 13:46:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33493 states. [2020-10-29 13:46:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33493 states to 33493 states and 49976 transitions. [2020-10-29 13:46:05,193 INFO L78 Accepts]: Start accepts. Automaton has 33493 states and 49976 transitions. Word has length 74 [2020-10-29 13:46:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:05,193 INFO L481 AbstractCegarLoop]: Abstraction has 33493 states and 49976 transitions. [2020-10-29 13:46:05,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:46:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 33493 states and 49976 transitions. [2020-10-29 13:46:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:46:05,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:05,196 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] [2020-10-29 13:46:05,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:46:05,196 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:05,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2029263805, now seen corresponding path program 1 times [2020-10-29 13:46:05,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:05,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968789684] [2020-10-29 13:46:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:05,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:05,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:05,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:06,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:06,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:46:06,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:46:06,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1470 [2020-10-29 13:46:06,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:06,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:46:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:46:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:46:06,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:07,008 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:46:07,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:07,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:07,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:07,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:07,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:07,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:46:07,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:07,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:07,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:46:07,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:07,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:46:07,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:46:07,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968789684] [2020-10-29 13:46:07,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:07,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:46:07,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765735323] [2020-10-29 13:46:07,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:46:07,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:07,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:46:07,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:46:07,055 INFO L87 Difference]: Start difference. First operand 33493 states and 49976 transitions. Second operand 7 states. [2020-10-29 13:46:07,351 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:46:08,578 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:46:08,858 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:46:16,221 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:46:16,568 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:46:16,854 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:46:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:20,526 INFO L93 Difference]: Finished difference Result 68407 states and 102270 transitions. [2020-10-29 13:46:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:46:20,526 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-29 13:46:20,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:20,610 INFO L225 Difference]: With dead ends: 68407 [2020-10-29 13:46:20,610 INFO L226 Difference]: Without dead ends: 56420 [2020-10-29 13:46:20,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:46:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56420 states. [2020-10-29 13:46:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56420 to 38842. [2020-10-29 13:46:28,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38842 states. [2020-10-29 13:46:28,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38842 states to 38842 states and 57956 transitions. [2020-10-29 13:46:28,428 INFO L78 Accepts]: Start accepts. Automaton has 38842 states and 57956 transitions. Word has length 74 [2020-10-29 13:46:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:28,428 INFO L481 AbstractCegarLoop]: Abstraction has 38842 states and 57956 transitions. [2020-10-29 13:46:28,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:46:28,428 INFO L276 IsEmpty]: Start isEmpty. Operand 38842 states and 57956 transitions. [2020-10-29 13:46:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:46:28,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:28,433 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] [2020-10-29 13:46:28,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:46:28,433 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:28,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:28,433 INFO L82 PathProgramCache]: Analyzing trace with hash -261799595, now seen corresponding path program 1 times [2020-10-29 13:46:28,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:28,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397894813] [2020-10-29 13:46:28,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:28,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:28,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:28,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:28,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:28,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:29,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:29,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:30,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:31,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:33,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:33,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:46:33,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:46:33,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:46:33,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:33,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:46:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:46:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 13:46:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:33,789 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:46:33,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:33,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:33,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:33,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:33,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:33,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:46:33,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:33,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:33,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:46:33,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:33,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:46:33,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:46:33,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397894813] [2020-10-29 13:46:33,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:33,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:46:33,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963259800] [2020-10-29 13:46:33,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:46:33,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:33,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:46:33,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:46:33,834 INFO L87 Difference]: Start difference. First operand 38842 states and 57956 transitions. Second operand 8 states. [2020-10-29 13:46:34,137 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:46:35,636 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:46:48,959 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:47:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:18,530 INFO L93 Difference]: Finished difference Result 218405 states and 324351 transitions. [2020-10-29 13:47:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:47:18,531 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-10-29 13:47:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:19,164 INFO L225 Difference]: With dead ends: 218405 [2020-10-29 13:47:19,165 INFO L226 Difference]: Without dead ends: 208682 [2020-10-29 13:47:19,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:47:19,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208682 states. [2020-10-29 13:47:28,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208682 to 39249. [2020-10-29 13:47:28,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39249 states. [2020-10-29 13:47:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39249 states to 39249 states and 58533 transitions. [2020-10-29 13:47:28,919 INFO L78 Accepts]: Start accepts. Automaton has 39249 states and 58533 transitions. Word has length 77 [2020-10-29 13:47:28,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:28,919 INFO L481 AbstractCegarLoop]: Abstraction has 39249 states and 58533 transitions. [2020-10-29 13:47:28,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:47:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 39249 states and 58533 transitions. [2020-10-29 13:47:28,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:47:28,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:28,923 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] [2020-10-29 13:47:28,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:47:28,923 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:28,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2094150125, now seen corresponding path program 1 times [2020-10-29 13:47:28,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:28,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698713990] [2020-10-29 13:47:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:28,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:28,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:29,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:29,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking...