/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:09:14,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:09:14,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:09:14,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:09:14,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:09:14,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:09:14,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:09:14,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:09:14,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:09:14,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:09:14,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:09:14,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:09:14,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:09:14,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:09:14,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:09:14,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:09:14,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:09:14,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:09:14,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:09:14,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:09:14,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:09:14,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:09:14,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:09:14,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:09:14,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:09:14,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:09:14,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:09:14,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:09:14,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:09:14,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:09:14,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:09:14,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:09:14,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:09:14,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:09:14,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:09:14,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:09:14,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:09:14,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:09:14,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:09:14,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:09:14,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:09:14,378 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 [2020-10-28 19:09:14,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:09:14,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:09:14,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:09:14,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:09:14,409 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:09:14,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:09:14,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:09:14,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:09:14,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:09:14,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:09:14,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:09:14,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:09:14,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:09:14,412 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:09:14,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:09:14,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:09:14,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:09:14,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:09:14,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:09:14,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:09:14,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:09:14,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:09:14,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:09:14,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:09:14,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:09:14,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:09:14,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:09:14,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:09:14,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:09:14,416 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:09:14,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:09:14,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:09:14,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:09:14,827 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:09:14,828 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:09:14,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-28 19:09:14,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b0d3ef0d/2c961ad532ed44f0a874ddf78ebd00e1/FLAGfb17417a2 [2020-10-28 19:09:15,689 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:09:15,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-28 19:09:15,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b0d3ef0d/2c961ad532ed44f0a874ddf78ebd00e1/FLAGfb17417a2 [2020-10-28 19:09:16,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b0d3ef0d/2c961ad532ed44f0a874ddf78ebd00e1 [2020-10-28 19:09:16,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:09:16,015 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:09:16,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:09:16,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:09:16,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:09:16,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:09:16" (1/1) ... [2020-10-28 19:09:16,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263e2936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:16, skipping insertion in model container [2020-10-28 19:09:16,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:09:16" (1/1) ... [2020-10-28 19:09:16,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:09:16,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:09:16,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:09:16,566 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:09:16,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:09:16,733 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:09:16,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:16 WrapperNode [2020-10-28 19:09:16,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:09:16,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:09:16,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:09:16,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:09:16,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:16" (1/1) ... [2020-10-28 19:09:16,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:16" (1/1) ... [2020-10-28 19:09:16,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:16" (1/1) ... [2020-10-28 19:09:16,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:16" (1/1) ... [2020-10-28 19:09:16,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:16" (1/1) ... [2020-10-28 19:09:16,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:16" (1/1) ... [2020-10-28 19:09:16,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:16" (1/1) ... [2020-10-28 19:09:16,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:09:16,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:09:16,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:09:16,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:09:16,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:16" (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 [2020-10-28 19:09:16,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:09:16,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:09:16,932 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:09:16,932 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:09:16,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:09:16,933 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:09:16,933 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:09:16,933 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:09:16,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:09:16,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:09:16,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:09:16,934 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:09:16,934 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:09:16,934 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:09:16,934 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:09:16,935 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:09:16,935 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:09:16,935 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:09:16,935 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:09:16,935 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:09:16,935 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 19:09:16,936 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:09:16,936 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:09:16,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:09:16,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:09:16,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:09:16,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:09:16,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:09:16,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:09:16,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:09:18,070 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:09:18,070 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:09:18,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:09:18 BoogieIcfgContainer [2020-10-28 19:09:18,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:09:18,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:09:18,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:09:18,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:09:18,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:09:16" (1/3) ... [2020-10-28 19:09:18,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b9be7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:09:18, skipping insertion in model container [2020-10-28 19:09:18,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:16" (2/3) ... [2020-10-28 19:09:18,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b9be7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:09:18, skipping insertion in model container [2020-10-28 19:09:18,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:09:18" (3/3) ... [2020-10-28 19:09:18,082 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-28 19:09:18,094 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:09:18,100 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:09:18,115 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:09:18,146 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:09:18,146 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:09:18,146 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:09:18,146 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:09:18,146 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:09:18,147 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:09:18,147 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:09:18,147 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:09:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states. [2020-10-28 19:09:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:09:18,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:18,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:18,193 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:18,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1049231677, now seen corresponding path program 1 times [2020-10-28 19:09:18,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:18,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027160215] [2020-10-28 19:09:18,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:18,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:18,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:19,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:19,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:19,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:21,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:23,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:23,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:09:23,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:09:23,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 19:09:23,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:23,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:23,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:23,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 19:09:23,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 19:09:23,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:09:24,463 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:09:24,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:24,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:24,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:24,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:24,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:24,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 19:09:24,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:24,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:24,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:24,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:24,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:24,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:09:24,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027160215] [2020-10-28 19:09:24,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:24,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:09:24,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820093321] [2020-10-28 19:09:24,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:09:24,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:24,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:09:24,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:09:24,582 INFO L87 Difference]: Start difference. First operand 167 states. Second operand 4 states. [2020-10-28 19:09:25,330 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:09:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:27,173 INFO L93 Difference]: Finished difference Result 383 states and 618 transitions. [2020-10-28 19:09:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:09:27,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-28 19:09:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:27,190 INFO L225 Difference]: With dead ends: 383 [2020-10-28 19:09:27,190 INFO L226 Difference]: Without dead ends: 256 [2020-10-28 19:09:27,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:09:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-28 19:09:27,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 253. [2020-10-28 19:09:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-28 19:09:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 375 transitions. [2020-10-28 19:09:27,265 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 375 transitions. Word has length 78 [2020-10-28 19:09:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:27,269 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 375 transitions. [2020-10-28 19:09:27,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:09:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 375 transitions. [2020-10-28 19:09:27,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:09:27,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:27,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:27,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:09:27,274 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:27,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:27,275 INFO L82 PathProgramCache]: Analyzing trace with hash -564100744, now seen corresponding path program 1 times [2020-10-28 19:09:27,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:27,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406870138] [2020-10-28 19:09:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:27,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:27,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:27,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:27,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:28,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:32,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:32,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:09:32,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:09:32,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4825 [2020-10-28 19:09:32,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:32,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 19:09:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 19:09:32,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:09:32,889 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:09:32,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:32,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:32,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:32,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:32,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:32,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 19:09:32,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:32,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:32,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:32,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:32,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:32,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:09:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:09:32,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406870138] [2020-10-28 19:09:32,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:32,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:09:32,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141914997] [2020-10-28 19:09:32,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:09:32,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:32,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:09:32,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:09:32,954 INFO L87 Difference]: Start difference. First operand 253 states and 375 transitions. Second operand 4 states. [2020-10-28 19:09:33,807 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:09:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:35,257 INFO L93 Difference]: Finished difference Result 631 states and 977 transitions. [2020-10-28 19:09:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:09:35,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 19:09:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:35,268 INFO L225 Difference]: With dead ends: 631 [2020-10-28 19:09:35,268 INFO L226 Difference]: Without dead ends: 426 [2020-10-28 19:09:35,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:09:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-28 19:09:35,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 423. [2020-10-28 19:09:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-10-28 19:09:35,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 646 transitions. [2020-10-28 19:09:35,353 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 646 transitions. Word has length 79 [2020-10-28 19:09:35,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:35,354 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 646 transitions. [2020-10-28 19:09:35,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:09:35,354 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 646 transitions. [2020-10-28 19:09:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:09:35,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:35,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:35,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:09:35,364 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:35,365 INFO L82 PathProgramCache]: Analyzing trace with hash -185185426, now seen corresponding path program 1 times [2020-10-28 19:09:35,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:35,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625382212] [2020-10-28 19:09:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:35,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:35,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:35,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:35,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:37,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:37,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 19:09:37,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:09:37,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2225 [2020-10-28 19:09:37,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:37,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:37,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:37,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 19:09:37,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 19:09:37,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:09:38,305 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:09:38,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:38,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:38,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:38,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:38,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:38,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:09:38,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:38,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:38,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:38,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:38,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:38,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:09:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:09:38,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625382212] [2020-10-28 19:09:38,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:38,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:09:38,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106136109] [2020-10-28 19:09:38,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:09:38,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:38,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:09:38,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:09:38,361 INFO L87 Difference]: Start difference. First operand 423 states and 646 transitions. Second operand 4 states. [2020-10-28 19:09:39,121 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:09:40,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:40,437 INFO L93 Difference]: Finished difference Result 1109 states and 1738 transitions. [2020-10-28 19:09:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:09:40,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 19:09:40,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:40,445 INFO L225 Difference]: With dead ends: 1109 [2020-10-28 19:09:40,446 INFO L226 Difference]: Without dead ends: 734 [2020-10-28 19:09:40,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:09:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-10-28 19:09:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 731. [2020-10-28 19:09:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-10-28 19:09:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1134 transitions. [2020-10-28 19:09:40,502 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1134 transitions. Word has length 80 [2020-10-28 19:09:40,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:40,503 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1134 transitions. [2020-10-28 19:09:40,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:09:40,504 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1134 transitions. [2020-10-28 19:09:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 19:09:40,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:40,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:40,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:09:40,506 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:40,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:40,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1581395920, now seen corresponding path program 1 times [2020-10-28 19:09:40,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:40,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707366344] [2020-10-28 19:09:40,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:40,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:40,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:40,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:41,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:41,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 19:09:41,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 19:09:41,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1124 [2020-10-28 19:09:41,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:41,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:41,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:41,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 19:09:41,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 19:09:41,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:42,425 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:09:42,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:42,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:42,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:42,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:42,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:42,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:09:42,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:42,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:42,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:42,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:09:42,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707366344] [2020-10-28 19:09:42,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:42,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:09:42,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929407601] [2020-10-28 19:09:42,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:09:42,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:42,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:09:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:09:42,475 INFO L87 Difference]: Start difference. First operand 731 states and 1134 transitions. Second operand 4 states. [2020-10-28 19:09:43,319 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:09:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:44,683 INFO L93 Difference]: Finished difference Result 1969 states and 3098 transitions. [2020-10-28 19:09:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:09:44,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 19:09:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:44,696 INFO L225 Difference]: With dead ends: 1969 [2020-10-28 19:09:44,696 INFO L226 Difference]: Without dead ends: 1286 [2020-10-28 19:09:44,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:09:44,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2020-10-28 19:09:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1283. [2020-10-28 19:09:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1283 states. [2020-10-28 19:09:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 2002 transitions. [2020-10-28 19:09:44,780 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 2002 transitions. Word has length 81 [2020-10-28 19:09:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:44,781 INFO L481 AbstractCegarLoop]: Abstraction has 1283 states and 2002 transitions. [2020-10-28 19:09:44,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:09:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 2002 transitions. [2020-10-28 19:09:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 19:09:44,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:44,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:44,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:09:44,783 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:44,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1174569093, now seen corresponding path program 1 times [2020-10-28 19:09:44,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:44,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171446192] [2020-10-28 19:09:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:44,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:44,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:45,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:45,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 19:09:45,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:09:45,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 673 [2020-10-28 19:09:45,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:45,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:45,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:45,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 19:09:45,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 19:09:45,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:46,204 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:09:46,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:46,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:46,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:46,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:46,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:46,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:09:46,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:46,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:46,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:46,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:46,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:46,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:09:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:09:46,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171446192] [2020-10-28 19:09:46,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:46,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:09:46,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941541502] [2020-10-28 19:09:46,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:09:46,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:46,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:09:46,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:09:46,272 INFO L87 Difference]: Start difference. First operand 1283 states and 2002 transitions. Second operand 4 states. [2020-10-28 19:09:47,067 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:09:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:48,562 INFO L93 Difference]: Finished difference Result 3497 states and 5494 transitions. [2020-10-28 19:09:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:09:48,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 19:09:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:48,579 INFO L225 Difference]: With dead ends: 3497 [2020-10-28 19:09:48,579 INFO L226 Difference]: Without dead ends: 2262 [2020-10-28 19:09:48,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:09:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2020-10-28 19:09:48,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2259. [2020-10-28 19:09:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2259 states. [2020-10-28 19:09:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 3522 transitions. [2020-10-28 19:09:48,728 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 3522 transitions. Word has length 82 [2020-10-28 19:09:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:48,729 INFO L481 AbstractCegarLoop]: Abstraction has 2259 states and 3522 transitions. [2020-10-28 19:09:48,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:09:48,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 3522 transitions. [2020-10-28 19:09:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 19:09:48,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:48,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:48,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:09:48,741 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:48,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:48,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1623994629, now seen corresponding path program 1 times [2020-10-28 19:09:48,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:48,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139849047] [2020-10-28 19:09:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:48,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:49,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:50,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:50,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 19:09:50,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:09:50,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1928 [2020-10-28 19:09:50,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:50,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:50,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 19:09:50,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:09:50,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 19:09:50,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:51,657 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:09:51,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:51,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:51,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:51,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:51,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:51,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:09:51,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:51,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:51,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:09:51,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139849047] [2020-10-28 19:09:51,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:51,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 19:09:51,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435944924] [2020-10-28 19:09:51,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 19:09:51,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:51,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 19:09:51,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:09:51,714 INFO L87 Difference]: Start difference. First operand 2259 states and 3522 transitions. Second operand 9 states. [2020-10-28 19:09:52,644 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 19:09:54,741 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 19:09:55,541 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 19:09:56,391 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 19:09:57,214 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:09:58,009 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:09:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:58,535 INFO L93 Difference]: Finished difference Result 17736 states and 27840 transitions. [2020-10-28 19:09:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:09:58,538 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-28 19:09:58,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:58,630 INFO L225 Difference]: With dead ends: 17736 [2020-10-28 19:09:58,631 INFO L226 Difference]: Without dead ends: 15525 [2020-10-28 19:09:58,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-10-28 19:09:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15525 states. [2020-10-28 19:09:59,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15525 to 4467. [2020-10-28 19:09:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4467 states. [2020-10-28 19:09:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6930 transitions. [2020-10-28 19:09:59,131 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6930 transitions. Word has length 83 [2020-10-28 19:09:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:59,131 INFO L481 AbstractCegarLoop]: Abstraction has 4467 states and 6930 transitions. [2020-10-28 19:09:59,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 19:09:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6930 transitions. [2020-10-28 19:09:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 19:09:59,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:59,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:59,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:09:59,133 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:59,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:59,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1770630148, now seen corresponding path program 1 times [2020-10-28 19:09:59,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:59,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735212546] [2020-10-28 19:09:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:59,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:59,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:00,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:00,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 19:10:00,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:10:00,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-10-28 19:10:00,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:00,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:10:00,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 19:10:00,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 19:10:00,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:00,943 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:10:00,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:00,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:00,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:00,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:00,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:00,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:10:00,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:00,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:00,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:00,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:00,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:00,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:00,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735212546] [2020-10-28 19:10:00,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:00,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:10:00,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264536397] [2020-10-28 19:10:00,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:10:00,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:00,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:10:00,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:00,993 INFO L87 Difference]: Start difference. First operand 4467 states and 6930 transitions. Second operand 5 states. [2020-10-28 19:10:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:03,139 INFO L93 Difference]: Finished difference Result 9014 states and 13940 transitions. [2020-10-28 19:10:03,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:10:03,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-10-28 19:10:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:03,201 INFO L225 Difference]: With dead ends: 9014 [2020-10-28 19:10:03,201 INFO L226 Difference]: Without dead ends: 9011 [2020-10-28 19:10:03,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:10:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9011 states. [2020-10-28 19:10:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9011 to 4595. [2020-10-28 19:10:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4595 states. [2020-10-28 19:10:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 7058 transitions. [2020-10-28 19:10:03,614 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 7058 transitions. Word has length 84 [2020-10-28 19:10:03,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:03,615 INFO L481 AbstractCegarLoop]: Abstraction has 4595 states and 7058 transitions. [2020-10-28 19:10:03,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:10:03,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 7058 transitions. [2020-10-28 19:10:03,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 19:10:03,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:03,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:03,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:10:03,616 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:03,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1242911510, now seen corresponding path program 1 times [2020-10-28 19:10:03,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:03,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280589528] [2020-10-28 19:10:03,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:03,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:03,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:04,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:04,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 19:10:04,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:10:04,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-28 19:10:04,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:04,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:04,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:04,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:10:04,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 19:10:04,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:05,425 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:10:05,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:05,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:05,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:05,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:05,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:05,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:10:05,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:05,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:05,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:05,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:05,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:05,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:05,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280589528] [2020-10-28 19:10:05,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:05,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:05,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244010827] [2020-10-28 19:10:05,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:05,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:05,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:05,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:05,474 INFO L87 Difference]: Start difference. First operand 4595 states and 7058 transitions. Second operand 4 states. [2020-10-28 19:10:06,210 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 19:10:07,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:07,719 INFO L93 Difference]: Finished difference Result 13241 states and 20310 transitions. [2020-10-28 19:10:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:07,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-28 19:10:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:07,743 INFO L225 Difference]: With dead ends: 13241 [2020-10-28 19:10:07,744 INFO L226 Difference]: Without dead ends: 8694 [2020-10-28 19:10:07,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8694 states. [2020-10-28 19:10:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8694 to 8691. [2020-10-28 19:10:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8691 states. [2020-10-28 19:10:08,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8691 states to 8691 states and 13234 transitions. [2020-10-28 19:10:08,537 INFO L78 Accepts]: Start accepts. Automaton has 8691 states and 13234 transitions. Word has length 85 [2020-10-28 19:10:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:08,538 INFO L481 AbstractCegarLoop]: Abstraction has 8691 states and 13234 transitions. [2020-10-28 19:10:08,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:08,538 INFO L276 IsEmpty]: Start isEmpty. Operand 8691 states and 13234 transitions. [2020-10-28 19:10:08,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 19:10:08,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:08,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:08,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:10:08,540 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:08,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:08,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1775503723, now seen corresponding path program 1 times [2020-10-28 19:10:08,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:08,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581635739] [2020-10-28 19:10:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:08,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:08,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:08,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:08,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 19:10:08,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:10:08,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-28 19:10:08,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:08,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:08,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:10:08,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:10:08,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 19:10:08,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:09,833 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:10:09,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:09,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:09,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:09,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:09,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:09,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:10:09,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:09,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:09,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:09,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:09,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:09,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:09,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581635739] [2020-10-28 19:10:09,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:09,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:10:09,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071606327] [2020-10-28 19:10:09,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:10:09,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:09,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:10:09,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:09,897 INFO L87 Difference]: Start difference. First operand 8691 states and 13234 transitions. Second operand 5 states. [2020-10-28 19:10:10,615 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 19:10:12,230 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 19:10:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:13,371 INFO L93 Difference]: Finished difference Result 17660 states and 27064 transitions. [2020-10-28 19:10:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:10:13,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-28 19:10:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:13,410 INFO L225 Difference]: With dead ends: 17660 [2020-10-28 19:10:13,410 INFO L226 Difference]: Without dead ends: 13113 [2020-10-28 19:10:13,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:10:13,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13113 states. [2020-10-28 19:10:14,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13113 to 13107. [2020-10-28 19:10:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13107 states. [2020-10-28 19:10:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13107 states to 13107 states and 19986 transitions. [2020-10-28 19:10:14,335 INFO L78 Accepts]: Start accepts. Automaton has 13107 states and 19986 transitions. Word has length 85 [2020-10-28 19:10:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:14,335 INFO L481 AbstractCegarLoop]: Abstraction has 13107 states and 19986 transitions. [2020-10-28 19:10:14,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:10:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand 13107 states and 19986 transitions. [2020-10-28 19:10:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 19:10:14,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:14,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:14,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:10:14,337 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:14,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:14,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1720494778, now seen corresponding path program 1 times [2020-10-28 19:10:14,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:14,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294521694] [2020-10-28 19:10:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:14,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:14,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:14,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:14,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:15,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:15,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 19:10:15,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:10:15,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1558 [2020-10-28 19:10:15,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:15,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 19:10:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 19:10:15,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:16,674 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:10:16,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:16,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:16,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:16,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:16,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:16,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:10:16,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:16,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:16,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:16,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:16,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:16,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:16,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294521694] [2020-10-28 19:10:16,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:16,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:16,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872125706] [2020-10-28 19:10:16,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:16,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:16,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:16,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:16,720 INFO L87 Difference]: Start difference. First operand 13107 states and 19986 transitions. Second operand 4 states. [2020-10-28 19:10:17,414 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:10:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:20,149 INFO L93 Difference]: Finished difference Result 29313 states and 44643 transitions. [2020-10-28 19:10:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:20,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-10-28 19:10:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:20,208 INFO L225 Difference]: With dead ends: 29313 [2020-10-28 19:10:20,208 INFO L226 Difference]: Without dead ends: 20664 [2020-10-28 19:10:20,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20664 states. [2020-10-28 19:10:21,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20664 to 20661. [2020-10-28 19:10:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20661 states. [2020-10-28 19:10:21,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20661 states to 20661 states and 31316 transitions. [2020-10-28 19:10:21,687 INFO L78 Accepts]: Start accepts. Automaton has 20661 states and 31316 transitions. Word has length 86 [2020-10-28 19:10:21,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:21,687 INFO L481 AbstractCegarLoop]: Abstraction has 20661 states and 31316 transitions. [2020-10-28 19:10:21,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:21,687 INFO L276 IsEmpty]: Start isEmpty. Operand 20661 states and 31316 transitions. [2020-10-28 19:10:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 19:10:21,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:21,699 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:21,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:10:21,700 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:21,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:21,700 INFO L82 PathProgramCache]: Analyzing trace with hash -283991766, now seen corresponding path program 1 times [2020-10-28 19:10:21,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:21,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023726889] [2020-10-28 19:10:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:21,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:21,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:21,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:22,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:22,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:22,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:26,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:26,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 19:10:26,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:10:26,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 19:10:26,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:26,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:26,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:26,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 19:10:26,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 19:10:26,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:10:27,460 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:10:27,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:27,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:27,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:27,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:27,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:27,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:10:27,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:27,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:27,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:27,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:27,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:27,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:10:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:27,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023726889] [2020-10-28 19:10:27,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:27,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:27,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485090147] [2020-10-28 19:10:27,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:27,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:27,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:27,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:27,540 INFO L87 Difference]: Start difference. First operand 20661 states and 31316 transitions. Second operand 4 states. [2020-10-28 19:10:28,376 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:10:31,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:31,556 INFO L93 Difference]: Finished difference Result 60123 states and 90968 transitions. [2020-10-28 19:10:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:31,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-28 19:10:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:31,658 INFO L225 Difference]: With dead ends: 60123 [2020-10-28 19:10:31,658 INFO L226 Difference]: Without dead ends: 39512 [2020-10-28 19:10:31,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39512 states. [2020-10-28 19:10:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39512 to 39509. [2020-10-28 19:10:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39509 states. [2020-10-28 19:10:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39509 states to 39509 states and 59380 transitions. [2020-10-28 19:10:34,405 INFO L78 Accepts]: Start accepts. Automaton has 39509 states and 59380 transitions. Word has length 115 [2020-10-28 19:10:34,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:34,405 INFO L481 AbstractCegarLoop]: Abstraction has 39509 states and 59380 transitions. [2020-10-28 19:10:34,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand 39509 states and 59380 transitions. [2020-10-28 19:10:34,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 19:10:34,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:34,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:34,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:10:34,420 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:34,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:34,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1876496747, now seen corresponding path program 1 times [2020-10-28 19:10:34,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:34,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656913281] [2020-10-28 19:10:34,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:34,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:34,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:34,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:34,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:34,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:35,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:38,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:39,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:39,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 19:10:39,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:10:39,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:10:39,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:39,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:39,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:39,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-28 19:10:39,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 19:10:39,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:40,212 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:10:40,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:40,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:40,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:40,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:40,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:40,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:10:40,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:40,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:40,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:40,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:40,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:40,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:40,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656913281] [2020-10-28 19:10:40,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:40,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:40,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012622783] [2020-10-28 19:10:40,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:40,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:40,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:40,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:40,254 INFO L87 Difference]: Start difference. First operand 39509 states and 59380 transitions. Second operand 4 states. [2020-10-28 19:10:41,053 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:10:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:46,546 INFO L93 Difference]: Finished difference Result 114907 states and 172280 transitions. [2020-10-28 19:10:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:46,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-28 19:10:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:46,675 INFO L225 Difference]: With dead ends: 114907 [2020-10-28 19:10:46,675 INFO L226 Difference]: Without dead ends: 75448 [2020-10-28 19:10:46,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:46,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75448 states. [2020-10-28 19:10:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75448 to 75445. [2020-10-28 19:10:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75445 states. [2020-10-28 19:10:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75445 states to 75445 states and 112308 transitions. [2020-10-28 19:10:51,885 INFO L78 Accepts]: Start accepts. Automaton has 75445 states and 112308 transitions. Word has length 115 [2020-10-28 19:10:51,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:51,886 INFO L481 AbstractCegarLoop]: Abstraction has 75445 states and 112308 transitions. [2020-10-28 19:10:51,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand 75445 states and 112308 transitions. [2020-10-28 19:10:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 19:10:51,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:51,914 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:51,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:10:51,915 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:51,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:51,915 INFO L82 PathProgramCache]: Analyzing trace with hash -330512126, now seen corresponding path program 1 times [2020-10-28 19:10:51,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:51,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487156204] [2020-10-28 19:10:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:51,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:52,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:52,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:52,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:53,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:53,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:53,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:56,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:56,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 19:10:56,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:10:56,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 19:10:56,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:56,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:56,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:56,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 19:10:56,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 19:10:56,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:57,792 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:10:57,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:57,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:57,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:57,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:57,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:57,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:10:57,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:57,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:57,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:57,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:57,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:57,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:57,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487156204] [2020-10-28 19:10:57,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:57,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:57,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101590498] [2020-10-28 19:10:57,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:57,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:57,848 INFO L87 Difference]: Start difference. First operand 75445 states and 112308 transitions. Second operand 4 states. [2020-10-28 19:11:01,539 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:11:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:11:03,378 INFO L93 Difference]: Finished difference Result 127467 states and 189605 transitions. [2020-10-28 19:11:03,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:11:03,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-28 19:11:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:11:03,448 INFO L225 Difference]: With dead ends: 127467 [2020-10-28 19:11:03,449 INFO L226 Difference]: Without dead ends: 52072 [2020-10-28 19:11:03,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:11:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52072 states. [2020-10-28 19:11:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52072 to 50789. [2020-10-28 19:11:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50789 states. [2020-10-28 19:11:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50789 states to 50789 states and 75421 transitions. [2020-10-28 19:11:07,154 INFO L78 Accepts]: Start accepts. Automaton has 50789 states and 75421 transitions. Word has length 115 [2020-10-28 19:11:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:11:07,154 INFO L481 AbstractCegarLoop]: Abstraction has 50789 states and 75421 transitions. [2020-10-28 19:11:07,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:11:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 50789 states and 75421 transitions. [2020-10-28 19:11:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 19:11:07,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:11:07,167 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:11:07,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:11:07,168 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:11:07,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:11:07,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1711735809, now seen corresponding path program 1 times [2020-10-28 19:11:07,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:11:07,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971105833] [2020-10-28 19:11:07,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:11:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:07,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:07,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:07,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:07,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:08,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:12,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:12,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 19:11:12,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:11:12,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 19:11:12,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:12,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:12,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:11:12,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-28 19:11:12,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 19:11:12,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:13,003 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:11:13,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:11:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:13,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:13,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:13,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:11:13,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:11:13,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:11:13,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:13,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:13,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:11:13,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:11:13,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:11:13,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:11:13,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971105833] [2020-10-28 19:11:13,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:11:13,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:11:13,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599206072] [2020-10-28 19:11:13,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:11:13,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:11:13,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:11:13,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:11:13,046 INFO L87 Difference]: Start difference. First operand 50789 states and 75421 transitions. Second operand 4 states. [2020-10-28 19:11:13,872 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:11:21,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:11:21,061 INFO L93 Difference]: Finished difference Result 143239 states and 211505 transitions. [2020-10-28 19:11:21,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:11:21,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-28 19:11:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:11:21,220 INFO L225 Difference]: With dead ends: 143239 [2020-10-28 19:11:21,220 INFO L226 Difference]: Without dead ends: 95748 [2020-10-28 19:11:21,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:11:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95748 states. [2020-10-28 19:11:27,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95748 to 95745. [2020-10-28 19:11:27,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95745 states. [2020-10-28 19:11:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95745 states to 95745 states and 140333 transitions. [2020-10-28 19:11:27,730 INFO L78 Accepts]: Start accepts. Automaton has 95745 states and 140333 transitions. Word has length 115 [2020-10-28 19:11:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:11:27,730 INFO L481 AbstractCegarLoop]: Abstraction has 95745 states and 140333 transitions. [2020-10-28 19:11:27,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:11:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 95745 states and 140333 transitions. [2020-10-28 19:11:27,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 19:11:27,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:11:27,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:11:27,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:11:27,925 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:11:27,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:11:27,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1788886551, now seen corresponding path program 1 times [2020-10-28 19:11:27,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:11:27,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482597689] [2020-10-28 19:11:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:11:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:27,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:28,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:28,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:28,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:29,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:32,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:32,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 19:11:32,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:11:32,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 19:11:32,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:32,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:32,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:11:32,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-28 19:11:32,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 19:11:32,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:33,738 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:11:33,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:11:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:33,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:33,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:33,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:11:33,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:11:33,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:11:33,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:33,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:33,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:11:33,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:11:33,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:11:33,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:11:33,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482597689] [2020-10-28 19:11:33,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:11:33,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:11:33,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282056897] [2020-10-28 19:11:33,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:11:33,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:11:33,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:11:33,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:11:33,798 INFO L87 Difference]: Start difference. First operand 95745 states and 140333 transitions. Second operand 4 states. [2020-10-28 19:11:34,619 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:11:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:11:47,000 INFO L93 Difference]: Finished difference Result 276237 states and 403139 transitions. [2020-10-28 19:11:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:11:47,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-28 19:11:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:11:47,528 INFO L225 Difference]: With dead ends: 276237 [2020-10-28 19:11:47,528 INFO L226 Difference]: Without dead ends: 182218 [2020-10-28 19:11:47,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:11:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182218 states. [2020-10-28 19:11:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182218 to 182215. [2020-10-28 19:11:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182215 states. [2020-10-28 19:12:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182215 states to 182215 states and 263871 transitions. [2020-10-28 19:12:00,297 INFO L78 Accepts]: Start accepts. Automaton has 182215 states and 263871 transitions. Word has length 115 [2020-10-28 19:12:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:12:00,297 INFO L481 AbstractCegarLoop]: Abstraction has 182215 states and 263871 transitions. [2020-10-28 19:12:00,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:12:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 182215 states and 263871 transitions. [2020-10-28 19:12:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 19:12:00,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:12:00,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:12:00,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 19:12:00,336 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:12:00,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:12:00,337 INFO L82 PathProgramCache]: Analyzing trace with hash 161033854, now seen corresponding path program 1 times [2020-10-28 19:12:00,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:12:00,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704337828] [2020-10-28 19:12:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:12:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:12:00,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:00,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:00,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:01,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:02,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:05,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:12:05,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 19:12:05,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:12:05,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 19:12:05,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:12:05,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:12:05,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:12:05,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-28 19:12:05,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 19:12:05,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:12:06,088 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:12:06,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:12:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:12:06,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:12:06,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:12:06,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:12:06,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:12:06,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:12:06,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:12:06,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:12:06,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:12:06,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:12:06,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:12:06,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:12:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:12:06,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704337828] [2020-10-28 19:12:06,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:12:06,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:12:06,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758077828] [2020-10-28 19:12:06,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:12:06,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:12:06,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:12:06,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:12:06,129 INFO L87 Difference]: Start difference. First operand 182215 states and 263871 transitions. Second operand 4 states. [2020-10-28 19:12:06,896 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:12:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:12:30,247 INFO L93 Difference]: Finished difference Result 527411 states and 760333 transitions. [2020-10-28 19:12:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:12:30,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-28 19:12:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:12:31,142 INFO L225 Difference]: With dead ends: 527411 [2020-10-28 19:12:31,142 INFO L226 Difference]: Without dead ends: 346736 [2020-10-28 19:12:31,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:12:31,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346736 states.