/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=DEEPEST --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.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:04:22,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:04:22,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:04:22,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:04:22,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:04:22,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:04:22,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:04:22,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:04:22,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:04:22,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:04:22,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:04:22,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:04:22,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:04:22,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:04:22,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:04:22,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:04:22,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:04:22,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:04:22,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:04:22,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:04:22,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:04:22,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:04:22,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:04:22,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:04:22,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:04:22,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:04:22,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:04:22,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:04:22,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:04:22,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:04:22,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:04:22,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:04:22,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:04:22,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:04:22,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:04:22,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:04:22,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:04:22,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:04:22,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:04:22,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:04:22,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:04:22,983 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 00:04:23,032 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:04:23,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:04:23,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:04:23,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:04:23,036 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:04:23,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:04:23,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:04:23,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:04:23,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:04:23,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:04:23,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:04:23,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:04:23,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:04:23,041 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:04:23,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:04:23,042 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:04:23,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:04:23,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:04:23,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:04:23,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:04:23,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:04:23,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:04:23,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:04:23,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:04:23,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:04:23,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:04:23,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:04:23,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:04:23,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:04:23,046 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:04:23,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:04:23,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:04:23,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:04:23,526 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:04:23,526 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:04:23,528 INFO L432 ainManager$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.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:04:23,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/702de25d0/8f0ff585291243ce80bc96e7f09bab57/FLAG6e09608a4 [2020-10-28 00:04:24,309 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:04:24,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:04:24,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/702de25d0/8f0ff585291243ce80bc96e7f09bab57/FLAG6e09608a4 [2020-10-28 00:04:24,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/702de25d0/8f0ff585291243ce80bc96e7f09bab57 [2020-10-28 00:04:24,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:04:24,674 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:04:24,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:04:24,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:04:24,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:04:24,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:04:24" (1/1) ... [2020-10-28 00:04:24,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc7cbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:24, skipping insertion in model container [2020-10-28 00:04:24,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:04:24" (1/1) ... [2020-10-28 00:04:24,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:04:24,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:04:25,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:04:25,076 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:04:25,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:04:25,199 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:04:25,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:25 WrapperNode [2020-10-28 00:04:25,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:04:25,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:04:25,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:04:25,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:04:25,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:25" (1/1) ... [2020-10-28 00:04:25,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:25" (1/1) ... [2020-10-28 00:04:25,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:25" (1/1) ... [2020-10-28 00:04:25,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:25" (1/1) ... [2020-10-28 00:04:25,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:25" (1/1) ... [2020-10-28 00:04:25,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:25" (1/1) ... [2020-10-28 00:04:25,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:25" (1/1) ... [2020-10-28 00:04:25,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:04:25,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:04:25,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:04:25,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:04:25,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:25" (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 00:04:25,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:04:25,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:04:25,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:04:25,394 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:04:25,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:04:25,395 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:04:25,396 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:04:25,396 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:04:25,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:04:25,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:04:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:04:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:04:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:04:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:04:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:04:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:04:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:04:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:04:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:04:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:04:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:04:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:04:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:04:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:04:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:04:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:04:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:04:26,355 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:04:26,356 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:04:26,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:04:26 BoogieIcfgContainer [2020-10-28 00:04:26,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:04:26,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:04:26,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:04:26,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:04:26,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:04:24" (1/3) ... [2020-10-28 00:04:26,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3e06c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:04:26, skipping insertion in model container [2020-10-28 00:04:26,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:04:25" (2/3) ... [2020-10-28 00:04:26,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3e06c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:04:26, skipping insertion in model container [2020-10-28 00:04:26,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:04:26" (3/3) ... [2020-10-28 00:04:26,368 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:04:26,381 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:04:26,387 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:04:26,401 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:04:26,431 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:04:26,432 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:04:26,432 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:04:26,432 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:04:26,432 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:04:26,432 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:04:26,433 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:04:26,433 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:04:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-10-28 00:04:26,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 00:04:26,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:26,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:26,465 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:26,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:26,472 INFO L82 PathProgramCache]: Analyzing trace with hash 787528518, now seen corresponding path program 1 times [2020-10-28 00:04:26,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:26,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973220011] [2020-10-28 00:04:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:26,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:26,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:27,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:28,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:28,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 00:04:28,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:04:28,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1608 [2020-10-28 00:04:28,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:28,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:04:28,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:04:28,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:04:28,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:04:28,813 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:28,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:28,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:28,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:28,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:28,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:28,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 00:04:28,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:28,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:28,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:28,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:28,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:28,959 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 00:04:28,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973220011] [2020-10-28 00:04:28,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:28,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:04:28,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634554200] [2020-10-28 00:04:28,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:04:28,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:29,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:04:29,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:04:29,012 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 4 states. [2020-10-28 00:04:29,343 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:04:29,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:29,932 INFO L93 Difference]: Finished difference Result 197 states and 309 transitions. [2020-10-28 00:04:29,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:04:29,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-28 00:04:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:29,947 INFO L225 Difference]: With dead ends: 197 [2020-10-28 00:04:29,947 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 00:04:29,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 00:04:30,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2020-10-28 00:04:30,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 00:04:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 177 transitions. [2020-10-28 00:04:30,015 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 177 transitions. Word has length 42 [2020-10-28 00:04:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:30,016 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 177 transitions. [2020-10-28 00:04:30,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:04:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 177 transitions. [2020-10-28 00:04:30,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 00:04:30,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:30,018 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] [2020-10-28 00:04:30,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:04:30,019 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:30,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:30,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1670931270, now seen corresponding path program 1 times [2020-10-28 00:04:30,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:30,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314170399] [2020-10-28 00:04:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:30,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:30,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:30,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:30,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 00:04:30,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:04:30,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-28 00:04:30,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:30,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:04:30,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:04:30,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:04:30,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:30,814 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:30,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:30,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:30,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:30,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:30,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:30,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 00:04:30,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:30,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:30,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:30,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:30,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:30,881 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 00:04:30,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314170399] [2020-10-28 00:04:30,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:30,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:04:30,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533444736] [2020-10-28 00:04:30,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:04:30,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:30,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:04:30,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:04:30,887 INFO L87 Difference]: Start difference. First operand 121 states and 177 transitions. Second operand 4 states. [2020-10-28 00:04:31,129 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:04:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:31,611 INFO L93 Difference]: Finished difference Result 283 states and 431 transitions. [2020-10-28 00:04:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:04:31,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 00:04:31,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:31,615 INFO L225 Difference]: With dead ends: 283 [2020-10-28 00:04:31,615 INFO L226 Difference]: Without dead ends: 186 [2020-10-28 00:04:31,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-28 00:04:31,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2020-10-28 00:04:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-28 00:04:31,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 274 transitions. [2020-10-28 00:04:31,643 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 274 transitions. Word has length 43 [2020-10-28 00:04:31,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:31,644 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 274 transitions. [2020-10-28 00:04:31,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:04:31,644 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 274 transitions. [2020-10-28 00:04:31,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 00:04:31,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:31,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:31,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:04:31,646 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:31,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:31,647 INFO L82 PathProgramCache]: Analyzing trace with hash -344628195, now seen corresponding path program 1 times [2020-10-28 00:04:31,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:31,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515399685] [2020-10-28 00:04:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:31,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:31,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:32,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:32,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 00:04:32,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:04:32,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-10-28 00:04:32,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:04:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:04:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:04:32,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:32,597 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:32,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:32,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:32,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:32,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:32,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:32,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:04:32,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:32,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:32,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:32,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:32,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:32,629 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 00:04:32,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515399685] [2020-10-28 00:04:32,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:32,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:04:32,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133462878] [2020-10-28 00:04:32,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:04:32,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:32,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:04:32,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:04:32,632 INFO L87 Difference]: Start difference. First operand 183 states and 274 transitions. Second operand 6 states. [2020-10-28 00:04:32,841 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:33,484 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:04:33,677 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:04:33,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:33,713 INFO L93 Difference]: Finished difference Result 819 states and 1274 transitions. [2020-10-28 00:04:33,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:04:33,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-28 00:04:33,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:33,720 INFO L225 Difference]: With dead ends: 819 [2020-10-28 00:04:33,720 INFO L226 Difference]: Without dead ends: 660 [2020-10-28 00:04:33,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:04:33,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2020-10-28 00:04:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 339. [2020-10-28 00:04:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-28 00:04:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 514 transitions. [2020-10-28 00:04:33,785 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 514 transitions. Word has length 44 [2020-10-28 00:04:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:33,786 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 514 transitions. [2020-10-28 00:04:33,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:04:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 514 transitions. [2020-10-28 00:04:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 00:04:33,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:33,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:33,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:04:33,788 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:33,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1626745906, now seen corresponding path program 1 times [2020-10-28 00:04:33,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:33,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314938242] [2020-10-28 00:04:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:33,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:33,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:34,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:34,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 00:04:34,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:04:34,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-28 00:04:34,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:34,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:04:34,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 00:04:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:04:34,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:04:34,524 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:34,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:34,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:34,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:34,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:34,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:34,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:04:34,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:34,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:34,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:34,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:34,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:34,560 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 00:04:34,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314938242] [2020-10-28 00:04:34,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:34,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:04:34,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709248615] [2020-10-28 00:04:34,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:04:34,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:34,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:04:34,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:34,564 INFO L87 Difference]: Start difference. First operand 339 states and 514 transitions. Second operand 5 states. [2020-10-28 00:04:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:35,159 INFO L93 Difference]: Finished difference Result 670 states and 1020 transitions. [2020-10-28 00:04:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:04:35,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-28 00:04:35,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:35,166 INFO L225 Difference]: With dead ends: 670 [2020-10-28 00:04:35,166 INFO L226 Difference]: Without dead ends: 667 [2020-10-28 00:04:35,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:04:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2020-10-28 00:04:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 355. [2020-10-28 00:04:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-28 00:04:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 530 transitions. [2020-10-28 00:04:35,216 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 530 transitions. Word has length 45 [2020-10-28 00:04:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:35,217 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 530 transitions. [2020-10-28 00:04:35,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:04:35,217 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 530 transitions. [2020-10-28 00:04:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 00:04:35,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:35,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:35,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:04:35,220 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:35,220 INFO L82 PathProgramCache]: Analyzing trace with hash -812439058, now seen corresponding path program 1 times [2020-10-28 00:04:35,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:35,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556465489] [2020-10-28 00:04:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:35,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:35,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:35,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:35,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 00:04:35,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:04:35,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-28 00:04:35,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:35,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:04:35,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:04:35,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 00:04:35,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:36,006 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:36,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:36,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:36,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:36,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:36,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:36,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:04:36,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:36,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:36,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:36,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:36,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:04:36,053 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 00:04:36,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556465489] [2020-10-28 00:04:36,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:36,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:04:36,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71280823] [2020-10-28 00:04:36,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:04:36,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:36,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:04:36,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:04:36,056 INFO L87 Difference]: Start difference. First operand 355 states and 530 transitions. Second operand 6 states. [2020-10-28 00:04:36,649 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:04:36,881 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:04:37,059 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:37,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:37,363 INFO L93 Difference]: Finished difference Result 1236 states and 1864 transitions. [2020-10-28 00:04:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:04:37,364 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-28 00:04:37,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:37,369 INFO L225 Difference]: With dead ends: 1236 [2020-10-28 00:04:37,369 INFO L226 Difference]: Without dead ends: 905 [2020-10-28 00:04:37,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:04:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2020-10-28 00:04:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 899. [2020-10-28 00:04:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2020-10-28 00:04:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1346 transitions. [2020-10-28 00:04:37,470 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1346 transitions. Word has length 46 [2020-10-28 00:04:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:37,470 INFO L481 AbstractCegarLoop]: Abstraction has 899 states and 1346 transitions. [2020-10-28 00:04:37,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:04:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1346 transitions. [2020-10-28 00:04:37,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 00:04:37,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:37,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:37,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:04:37,473 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:37,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:37,473 INFO L82 PathProgramCache]: Analyzing trace with hash -175937875, now seen corresponding path program 1 times [2020-10-28 00:04:37,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:37,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931764382] [2020-10-28 00:04:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:37,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:37,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:37,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:37,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 00:04:37,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:04:37,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-28 00:04:37,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:37,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:04:37,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:04:37,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:04:37,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:37,863 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:37,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:37,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:37,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:37,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:37,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:37,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:04:37,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:37,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:37,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:37,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:37,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:37,902 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 00:04:37,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931764382] [2020-10-28 00:04:37,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:37,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:04:37,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140360371] [2020-10-28 00:04:37,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:04:37,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:37,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:04:37,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:04:37,909 INFO L87 Difference]: Start difference. First operand 899 states and 1346 transitions. Second operand 4 states. [2020-10-28 00:04:38,098 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:04:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:38,713 INFO L93 Difference]: Finished difference Result 2385 states and 3558 transitions. [2020-10-28 00:04:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:04:38,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-28 00:04:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:38,722 INFO L225 Difference]: With dead ends: 2385 [2020-10-28 00:04:38,723 INFO L226 Difference]: Without dead ends: 1510 [2020-10-28 00:04:38,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2020-10-28 00:04:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1507. [2020-10-28 00:04:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1507 states. [2020-10-28 00:04:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2210 transitions. [2020-10-28 00:04:38,857 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2210 transitions. Word has length 46 [2020-10-28 00:04:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:38,858 INFO L481 AbstractCegarLoop]: Abstraction has 1507 states and 2210 transitions. [2020-10-28 00:04:38,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:04:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2210 transitions. [2020-10-28 00:04:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 00:04:38,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:38,859 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] [2020-10-28 00:04:38,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:04:38,860 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:38,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1310634107, now seen corresponding path program 1 times [2020-10-28 00:04:38,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:38,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223525639] [2020-10-28 00:04:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:38,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:38,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:39,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:39,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 00:04:39,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:04:39,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-28 00:04:39,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:39,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:04:39,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:04:39,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 00:04:39,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:39,485 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:39,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:39,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:39,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:39,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:39,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:39,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:04:39,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:39,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:39,513 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 00:04:39,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223525639] [2020-10-28 00:04:39,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:39,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:04:39,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328468778] [2020-10-28 00:04:39,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:04:39,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:39,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:04:39,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:04:39,516 INFO L87 Difference]: Start difference. First operand 1507 states and 2210 transitions. Second operand 4 states. [2020-10-28 00:04:39,700 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:04:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:40,205 INFO L93 Difference]: Finished difference Result 3583 states and 5260 transitions. [2020-10-28 00:04:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:04:40,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-28 00:04:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:40,217 INFO L225 Difference]: With dead ends: 3583 [2020-10-28 00:04:40,217 INFO L226 Difference]: Without dead ends: 2100 [2020-10-28 00:04:40,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2020-10-28 00:04:40,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2097. [2020-10-28 00:04:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2097 states. [2020-10-28 00:04:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 3052 transitions. [2020-10-28 00:04:40,397 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 3052 transitions. Word has length 48 [2020-10-28 00:04:40,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:40,398 INFO L481 AbstractCegarLoop]: Abstraction has 2097 states and 3052 transitions. [2020-10-28 00:04:40,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:04:40,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 3052 transitions. [2020-10-28 00:04:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 00:04:40,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:40,401 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:04:40,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:04:40,401 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:40,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1670490345, now seen corresponding path program 1 times [2020-10-28 00:04:40,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:40,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878758107] [2020-10-28 00:04:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:40,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:40,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:41,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:41,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 00:04:41,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:04:41,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-10-28 00:04:41,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:04:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:04:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 00:04:41,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:41,233 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:41,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:41,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:41,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:41,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:41,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:41,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:04:41,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:41,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:41,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:41,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:41,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:04:41,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878758107] [2020-10-28 00:04:41,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:04:41,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:04:41,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903696669] [2020-10-28 00:04:41,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:04:41,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:41,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:04:41,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:41,280 INFO L87 Difference]: Start difference. First operand 2097 states and 3052 transitions. Second operand 5 states. [2020-10-28 00:04:41,464 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:04:41,963 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:04:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:42,219 INFO L93 Difference]: Finished difference Result 4954 states and 7250 transitions. [2020-10-28 00:04:42,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:04:42,219 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-28 00:04:42,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:42,237 INFO L225 Difference]: With dead ends: 4954 [2020-10-28 00:04:42,237 INFO L226 Difference]: Without dead ends: 3471 [2020-10-28 00:04:42,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:04:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3471 states. [2020-10-28 00:04:42,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3471 to 3465. [2020-10-28 00:04:42,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3465 states. [2020-10-28 00:04:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5012 transitions. [2020-10-28 00:04:42,560 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5012 transitions. Word has length 65 [2020-10-28 00:04:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:42,561 INFO L481 AbstractCegarLoop]: Abstraction has 3465 states and 5012 transitions. [2020-10-28 00:04:42,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:04:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5012 transitions. [2020-10-28 00:04:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 00:04:42,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:42,564 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] [2020-10-28 00:04:42,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:04:42,564 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1445263367, now seen corresponding path program 1 times [2020-10-28 00:04:42,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:42,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977733062] [2020-10-28 00:04:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:42,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:42,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:42,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:42,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:42,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:47,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:47,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 00:04:47,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:04:47,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:04:47,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:47,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:04:47,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 00:04:47,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:04:47,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:47,812 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:47,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:47,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:47,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:47,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:47,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:47,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:04:47,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:47,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:47,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:47,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:47,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:47,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977733062] [2020-10-28 00:04:47,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:47,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:04:47,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617835050] [2020-10-28 00:04:47,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:04:47,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:47,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:04:47,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:04:47,853 INFO L87 Difference]: Start difference. First operand 3465 states and 5012 transitions. Second operand 4 states. [2020-10-28 00:04:48,515 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:04:48,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:48,668 INFO L93 Difference]: Finished difference Result 6176 states and 8923 transitions. [2020-10-28 00:04:48,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:04:48,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 00:04:48,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:48,686 INFO L225 Difference]: With dead ends: 6176 [2020-10-28 00:04:48,686 INFO L226 Difference]: Without dead ends: 2737 [2020-10-28 00:04:48,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2020-10-28 00:04:48,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 2614. [2020-10-28 00:04:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2614 states. [2020-10-28 00:04:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 3752 transitions. [2020-10-28 00:04:48,959 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 3752 transitions. Word has length 66 [2020-10-28 00:04:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:48,960 INFO L481 AbstractCegarLoop]: Abstraction has 2614 states and 3752 transitions. [2020-10-28 00:04:48,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:04:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 3752 transitions. [2020-10-28 00:04:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 00:04:48,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:48,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:48,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:04:48,963 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:48,964 INFO L82 PathProgramCache]: Analyzing trace with hash -593447078, now seen corresponding path program 1 times [2020-10-28 00:04:48,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:48,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817789348] [2020-10-28 00:04:48,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:49,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:49,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:49,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:49,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:49,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:52,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:52,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 00:04:52,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:04:52,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3613 [2020-10-28 00:04:52,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:52,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:04:52,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:04:52,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 00:04:52,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:52,813 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:52,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:52,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:52,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:52,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:52,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:52,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:04:52,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:52,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:52,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:52,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:52,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:52,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817789348] [2020-10-28 00:04:52,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:04:52,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:04:52,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992520644] [2020-10-28 00:04:52,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:04:52,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:52,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:04:52,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:04:52,846 INFO L87 Difference]: Start difference. First operand 2614 states and 3752 transitions. Second operand 6 states. [2020-10-28 00:04:53,496 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:04:53,818 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:04:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:54,000 INFO L93 Difference]: Finished difference Result 6835 states and 9721 transitions. [2020-10-28 00:04:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 00:04:54,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-28 00:04:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:54,024 INFO L225 Difference]: With dead ends: 6835 [2020-10-28 00:04:54,025 INFO L226 Difference]: Without dead ends: 4263 [2020-10-28 00:04:54,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:04:54,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2020-10-28 00:04:54,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 3131. [2020-10-28 00:04:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3131 states. [2020-10-28 00:04:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4368 transitions. [2020-10-28 00:04:54,339 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4368 transitions. Word has length 66 [2020-10-28 00:04:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:54,340 INFO L481 AbstractCegarLoop]: Abstraction has 3131 states and 4368 transitions. [2020-10-28 00:04:54,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:04:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4368 transitions. [2020-10-28 00:04:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 00:04:54,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:54,342 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:54,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:04:54,342 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:54,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1494511345, now seen corresponding path program 1 times [2020-10-28 00:04:54,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:54,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165726508] [2020-10-28 00:04:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:54,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:54,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:54,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:54,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:55,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:55,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:55,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:56,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:59,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:59,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 00:04:59,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:04:59,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:04:59,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:59,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:04:59,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:04:59,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:04:59,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:59,599 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:04:59,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:59,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:59,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:59,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:59,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:59,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:04:59,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:59,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:59,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:59,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:59,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:59,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165726508] [2020-10-28 00:04:59,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:59,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:04:59,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765652046] [2020-10-28 00:04:59,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:04:59,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:59,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:04:59,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:04:59,650 INFO L87 Difference]: Start difference. First operand 3131 states and 4368 transitions. Second operand 4 states. [2020-10-28 00:04:59,916 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:05:00,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:00,657 INFO L93 Difference]: Finished difference Result 4807 states and 6678 transitions. [2020-10-28 00:05:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:05:00,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 00:05:00,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:00,675 INFO L225 Difference]: With dead ends: 4807 [2020-10-28 00:05:00,675 INFO L226 Difference]: Without dead ends: 3299 [2020-10-28 00:05:00,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:05:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3299 states. [2020-10-28 00:05:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3299 to 3174. [2020-10-28 00:05:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-10-28 00:05:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 4333 transitions. [2020-10-28 00:05:01,013 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 4333 transitions. Word has length 66 [2020-10-28 00:05:01,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:01,013 INFO L481 AbstractCegarLoop]: Abstraction has 3174 states and 4333 transitions. [2020-10-28 00:05:01,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:05:01,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 4333 transitions. [2020-10-28 00:05:01,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 00:05:01,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:01,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:05:01,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:05:01,022 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:01,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:01,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2006111015, now seen corresponding path program 1 times [2020-10-28 00:05:01,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:01,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669343402] [2020-10-28 00:05:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:01,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:01,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:01,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:01,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:01,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:02,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:06,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:06,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 00:05:06,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:05:06,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:05:06,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:06,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:05:06,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:05:06,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:05:06,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:06,240 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:05:06,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:06,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:06,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:06,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:06,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:06,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:05:06,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:06,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:06,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:06,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:06,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:06,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669343402] [2020-10-28 00:05:06,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:05:06,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:05:06,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550564494] [2020-10-28 00:05:06,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:05:06,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:06,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:05:06,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:05:06,272 INFO L87 Difference]: Start difference. First operand 3174 states and 4333 transitions. Second operand 4 states. [2020-10-28 00:05:06,535 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:05:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:07,321 INFO L93 Difference]: Finished difference Result 6339 states and 8634 transitions. [2020-10-28 00:05:07,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:05:07,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 00:05:07,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:07,343 INFO L225 Difference]: With dead ends: 6339 [2020-10-28 00:05:07,343 INFO L226 Difference]: Without dead ends: 4132 [2020-10-28 00:05:07,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:05:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4132 states. [2020-10-28 00:05:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4132 to 4087. [2020-10-28 00:05:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4087 states. [2020-10-28 00:05:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 5518 transitions. [2020-10-28 00:05:07,735 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 5518 transitions. Word has length 66 [2020-10-28 00:05:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:07,736 INFO L481 AbstractCegarLoop]: Abstraction has 4087 states and 5518 transitions. [2020-10-28 00:05:07,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:05:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 5518 transitions. [2020-10-28 00:05:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 00:05:07,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:07,738 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:05:07,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:05:07,739 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:07,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2089009923, now seen corresponding path program 1 times [2020-10-28 00:05:07,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:07,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170614774] [2020-10-28 00:05:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:07,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:07,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:07,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:08,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:08,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:09,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:09,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 00:05:09,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:05:09,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1974 [2020-10-28 00:05:09,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:09,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:05:09,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:05:09,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 00:05:09,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:09,993 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:05:09,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:10,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:10,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:10,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:10,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:10,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:05:10,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:10,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:10,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:10,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:10,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:10,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170614774] [2020-10-28 00:05:10,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:05:10,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:05:10,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142733120] [2020-10-28 00:05:10,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:05:10,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:10,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:05:10,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:05:10,035 INFO L87 Difference]: Start difference. First operand 4087 states and 5518 transitions. Second operand 6 states. [2020-10-28 00:05:10,987 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:05:11,221 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:05:12,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:12,007 INFO L93 Difference]: Finished difference Result 13496 states and 18210 transitions. [2020-10-28 00:05:12,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:05:12,008 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-28 00:05:12,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:12,049 INFO L225 Difference]: With dead ends: 13496 [2020-10-28 00:05:12,049 INFO L226 Difference]: Without dead ends: 9458 [2020-10-28 00:05:12,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:05:12,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9458 states. [2020-10-28 00:05:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9458 to 5461. [2020-10-28 00:05:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5461 states. [2020-10-28 00:05:12,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5461 states to 5461 states and 7255 transitions. [2020-10-28 00:05:12,721 INFO L78 Accepts]: Start accepts. Automaton has 5461 states and 7255 transitions. Word has length 66 [2020-10-28 00:05:12,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:12,722 INFO L481 AbstractCegarLoop]: Abstraction has 5461 states and 7255 transitions. [2020-10-28 00:05:12,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:05:12,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5461 states and 7255 transitions. [2020-10-28 00:05:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:05:12,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:12,725 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:05:12,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:05:12,726 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:12,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:12,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1202214517, now seen corresponding path program 1 times [2020-10-28 00:05:12,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:12,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795956105] [2020-10-28 00:05:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:12,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:12,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:12,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:12,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:12,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:13,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:13,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:15,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:17,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:17,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:05:17,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:05:17,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:05:17,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:17,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:05:17,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:05:17,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:05:17,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:05:17,938 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:05:17,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:17,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:17,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:17,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:17,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:17,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:05:17,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:17,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:17,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:17,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:17,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:17,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795956105] [2020-10-28 00:05:17,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:05:17,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:05:17,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215383051] [2020-10-28 00:05:17,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:05:17,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:17,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:05:17,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:05:17,972 INFO L87 Difference]: Start difference. First operand 5461 states and 7255 transitions. Second operand 4 states. [2020-10-28 00:05:18,163 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:05:19,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:19,345 INFO L93 Difference]: Finished difference Result 11020 states and 14596 transitions. [2020-10-28 00:05:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:05:19,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 00:05:19,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:19,365 INFO L225 Difference]: With dead ends: 11020 [2020-10-28 00:05:19,365 INFO L226 Difference]: Without dead ends: 7053 [2020-10-28 00:05:19,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:05:19,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7053 states. [2020-10-28 00:05:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7053 to 6983. [2020-10-28 00:05:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6983 states. [2020-10-28 00:05:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6983 states to 6983 states and 9156 transitions. [2020-10-28 00:05:19,958 INFO L78 Accepts]: Start accepts. Automaton has 6983 states and 9156 transitions. Word has length 67 [2020-10-28 00:05:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:19,958 INFO L481 AbstractCegarLoop]: Abstraction has 6983 states and 9156 transitions. [2020-10-28 00:05:19,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:05:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 6983 states and 9156 transitions. [2020-10-28 00:05:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:05:19,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:19,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:05:19,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:05:19,962 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:19,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:19,962 INFO L82 PathProgramCache]: Analyzing trace with hash -210449420, now seen corresponding path program 1 times [2020-10-28 00:05:19,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:19,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690802222] [2020-10-28 00:05:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:19,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:20,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:20,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:20,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:20,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:22,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:22,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:05:22,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:05:22,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2429 [2020-10-28 00:05:22,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:22,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:05:22,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:05:22,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:05:22,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:22,614 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:05:22,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:22,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:22,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:22,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:22,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:22,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:05:22,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:22,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:22,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:22,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:22,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:22,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690802222] [2020-10-28 00:05:22,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:05:22,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:05:22,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075018966] [2020-10-28 00:05:22,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:05:22,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:22,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:05:22,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:05:22,645 INFO L87 Difference]: Start difference. First operand 6983 states and 9156 transitions. Second operand 6 states. [2020-10-28 00:05:23,388 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:05:23,636 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:05:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:24,286 INFO L93 Difference]: Finished difference Result 17934 states and 23387 transitions. [2020-10-28 00:05:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:05:24,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 00:05:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:24,317 INFO L225 Difference]: With dead ends: 17934 [2020-10-28 00:05:24,317 INFO L226 Difference]: Without dead ends: 11056 [2020-10-28 00:05:24,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:05:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11056 states. [2020-10-28 00:05:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11056 to 7163. [2020-10-28 00:05:25,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7163 states. [2020-10-28 00:05:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7163 states to 7163 states and 9149 transitions. [2020-10-28 00:05:25,145 INFO L78 Accepts]: Start accepts. Automaton has 7163 states and 9149 transitions. Word has length 67 [2020-10-28 00:05:25,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:25,145 INFO L481 AbstractCegarLoop]: Abstraction has 7163 states and 9149 transitions. [2020-10-28 00:05:25,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:05:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 7163 states and 9149 transitions. [2020-10-28 00:05:25,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:05:25,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:25,148 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:05:25,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:05:25,148 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:25,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:25,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1249495270, now seen corresponding path program 1 times [2020-10-28 00:05:25,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:25,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928054778] [2020-10-28 00:05:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:25,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:25,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:25,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:25,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:25,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:25,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:26,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:26,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:26,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:26,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:26,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:26,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:27,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:30,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:30,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:05:30,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:05:30,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:05:30,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:30,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:05:30,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:05:30,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:05:30,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:30,599 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:05:30,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:30,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:30,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:30,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:30,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:30,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:05:30,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:30,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:30,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:30,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:30,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:30,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928054778] [2020-10-28 00:05:30,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:05:30,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:05:30,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815462875] [2020-10-28 00:05:30,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:05:30,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:30,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:05:30,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:05:30,641 INFO L87 Difference]: Start difference. First operand 7163 states and 9149 transitions. Second operand 11 states. [2020-10-28 00:05:30,918 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:05:32,809 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:05:33,090 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:05:33,420 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:05:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:35,065 INFO L93 Difference]: Finished difference Result 26779 states and 33616 transitions. [2020-10-28 00:05:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 00:05:35,066 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-28 00:05:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:35,124 INFO L225 Difference]: With dead ends: 26779 [2020-10-28 00:05:35,124 INFO L226 Difference]: Without dead ends: 22726 [2020-10-28 00:05:35,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=411, Invalid=1569, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 00:05:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22726 states. [2020-10-28 00:05:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22726 to 7793. [2020-10-28 00:05:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7793 states. [2020-10-28 00:05:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7793 states to 7793 states and 9942 transitions. [2020-10-28 00:05:36,057 INFO L78 Accepts]: Start accepts. Automaton has 7793 states and 9942 transitions. Word has length 68 [2020-10-28 00:05:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:36,057 INFO L481 AbstractCegarLoop]: Abstraction has 7793 states and 9942 transitions. [2020-10-28 00:05:36,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:05:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 7793 states and 9942 transitions. [2020-10-28 00:05:36,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:05:36,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:36,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:05:36,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:05:36,062 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:36,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:36,062 INFO L82 PathProgramCache]: Analyzing trace with hash 335984277, now seen corresponding path program 1 times [2020-10-28 00:05:36,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:36,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693526870] [2020-10-28 00:05:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:36,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:36,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:36,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:36,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:36,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:36,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:37,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:41,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:41,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:05:41,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:05:41,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-28 00:05:41,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:41,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:05:41,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:05:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 00:05:41,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:41,338 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:05:41,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:41,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:41,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:41,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:41,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:41,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:05:41,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:41,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:41,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:41,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693526870] [2020-10-28 00:05:41,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:05:41,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:05:41,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140640205] [2020-10-28 00:05:41,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:05:41,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:41,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:05:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:05:41,365 INFO L87 Difference]: Start difference. First operand 7793 states and 9942 transitions. Second operand 6 states. [2020-10-28 00:05:41,559 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:05:42,453 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:05:42,734 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:05:44,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:44,663 INFO L93 Difference]: Finished difference Result 29293 states and 37224 transitions. [2020-10-28 00:05:44,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:05:44,664 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-28 00:05:44,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:44,708 INFO L225 Difference]: With dead ends: 29293 [2020-10-28 00:05:44,708 INFO L226 Difference]: Without dead ends: 22261 [2020-10-28 00:05:44,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:05:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22261 states. [2020-10-28 00:05:46,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22261 to 18436. [2020-10-28 00:05:46,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18436 states. [2020-10-28 00:05:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18436 states to 18436 states and 23369 transitions. [2020-10-28 00:05:46,437 INFO L78 Accepts]: Start accepts. Automaton has 18436 states and 23369 transitions. Word has length 68 [2020-10-28 00:05:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:46,437 INFO L481 AbstractCegarLoop]: Abstraction has 18436 states and 23369 transitions. [2020-10-28 00:05:46,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:05:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 18436 states and 23369 transitions. [2020-10-28 00:05:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:05:46,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:46,441 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:05:46,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:05:46,441 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:46,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1060971654, now seen corresponding path program 1 times [2020-10-28 00:05:46,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:46,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546275506] [2020-10-28 00:05:46,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:46,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:46,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:46,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:46,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:47,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:47,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:47,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:48,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:48,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:48,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:49,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:51,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:51,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:05:51,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:05:51,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:05:51,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:51,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 00:05:51,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:05:51,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 00:05:51,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:51,767 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2020-10-28 00:05:52,047 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:05:52,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:52,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:52,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:52,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:52,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:52,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:05:52,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:52,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:52,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:52,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:52,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:52,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546275506] [2020-10-28 00:05:52,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:05:52,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 00:05:52,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455345612] [2020-10-28 00:05:52,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 00:05:52,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:52,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 00:05:52,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:05:52,086 INFO L87 Difference]: Start difference. First operand 18436 states and 23369 transitions. Second operand 12 states. [2020-10-28 00:05:52,389 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:05:56,036 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:05:56,287 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:05:56,597 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:05:57,100 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:06:01,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:01,993 INFO L93 Difference]: Finished difference Result 40729 states and 51041 transitions. [2020-10-28 00:06:01,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-10-28 00:06:01,993 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-28 00:06:01,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:02,053 INFO L225 Difference]: With dead ends: 40729 [2020-10-28 00:06:02,053 INFO L226 Difference]: Without dead ends: 35652 [2020-10-28 00:06:02,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3510 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1252, Invalid=7490, Unknown=0, NotChecked=0, Total=8742 [2020-10-28 00:06:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35652 states. [2020-10-28 00:06:04,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35652 to 18755. [2020-10-28 00:06:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18755 states. [2020-10-28 00:06:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18755 states to 18755 states and 23820 transitions. [2020-10-28 00:06:04,595 INFO L78 Accepts]: Start accepts. Automaton has 18755 states and 23820 transitions. Word has length 68 [2020-10-28 00:06:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:04,595 INFO L481 AbstractCegarLoop]: Abstraction has 18755 states and 23820 transitions. [2020-10-28 00:06:04,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 00:06:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 18755 states and 23820 transitions. [2020-10-28 00:06:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:06:04,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:04,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:06:04,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:06:04,600 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash -583045172, now seen corresponding path program 1 times [2020-10-28 00:06:04,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:04,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195804746] [2020-10-28 00:06:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:04,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:04,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:04,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:04,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:04,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:04,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:05,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:06,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:06,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:06,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:06,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:06,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:07,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:09,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:09,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:06:09,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:06:09,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:06:09,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:09,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:06:09,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:06:09,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:06:09,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:10,029 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:06:10,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:10,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:10,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:10,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:10,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:10,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:06:10,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:10,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:10,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:10,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:10,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:10,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195804746] [2020-10-28 00:06:10,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:06:10,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:06:10,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983575419] [2020-10-28 00:06:10,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:06:10,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:10,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:06:10,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:06:10,056 INFO L87 Difference]: Start difference. First operand 18755 states and 23820 transitions. Second operand 11 states. [2020-10-28 00:06:10,295 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:06:12,282 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:06:14,234 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:06:18,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:18,523 INFO L93 Difference]: Finished difference Result 63159 states and 79792 transitions. [2020-10-28 00:06:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 00:06:18,524 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-10-28 00:06:18,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:18,587 INFO L225 Difference]: With dead ends: 63159 [2020-10-28 00:06:18,587 INFO L226 Difference]: Without dead ends: 49254 [2020-10-28 00:06:18,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=433, Invalid=1547, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 00:06:18,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49254 states. [2020-10-28 00:06:21,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49254 to 22349. [2020-10-28 00:06:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22349 states. [2020-10-28 00:06:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22349 states to 22349 states and 28430 transitions. [2020-10-28 00:06:21,852 INFO L78 Accepts]: Start accepts. Automaton has 22349 states and 28430 transitions. Word has length 69 [2020-10-28 00:06:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:21,853 INFO L481 AbstractCegarLoop]: Abstraction has 22349 states and 28430 transitions. [2020-10-28 00:06:21,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:06:21,853 INFO L276 IsEmpty]: Start isEmpty. Operand 22349 states and 28430 transitions. [2020-10-28 00:06:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:06:21,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:21,859 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:06:21,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:06:21,860 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:21,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:21,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1401210531, now seen corresponding path program 1 times [2020-10-28 00:06:21,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:21,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411328715] [2020-10-28 00:06:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:21,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:21,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:21,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:21,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:22,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:22,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:22,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:22,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:24,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:24,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:24,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:24,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:24,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:26,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:26,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:06:26,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:06:26,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:06:26,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:26,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:06:26,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:06:26,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:06:26,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:27,130 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 24 [2020-10-28 00:06:27,383 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:06:27,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:27,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:27,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:27,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:27,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:27,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:06:27,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:27,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:27,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:27,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:27,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:27,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411328715] [2020-10-28 00:06:27,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:06:27,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:06:27,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576982839] [2020-10-28 00:06:27,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:06:27,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:27,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:06:27,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:06:27,409 INFO L87 Difference]: Start difference. First operand 22349 states and 28430 transitions. Second operand 11 states. [2020-10-28 00:06:27,684 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:06:29,494 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:06:29,854 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:06:33,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:33,430 INFO L93 Difference]: Finished difference Result 39006 states and 49371 transitions. [2020-10-28 00:06:33,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 00:06:33,430 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-10-28 00:06:33,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:33,467 INFO L225 Difference]: With dead ends: 39006 [2020-10-28 00:06:33,467 INFO L226 Difference]: Without dead ends: 29507 [2020-10-28 00:06:33,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 00:06:33,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29507 states. [2020-10-28 00:06:36,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29507 to 22771. [2020-10-28 00:06:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22771 states. [2020-10-28 00:06:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22771 states to 22771 states and 28960 transitions. [2020-10-28 00:06:36,361 INFO L78 Accepts]: Start accepts. Automaton has 22771 states and 28960 transitions. Word has length 69 [2020-10-28 00:06:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:36,361 INFO L481 AbstractCegarLoop]: Abstraction has 22771 states and 28960 transitions. [2020-10-28 00:06:36,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:06:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 22771 states and 28960 transitions. [2020-10-28 00:06:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:06:36,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:36,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:06:36,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 00:06:36,368 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:36,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1496800834, now seen corresponding path program 1 times [2020-10-28 00:06:36,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:36,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172955329] [2020-10-28 00:06:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:36,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:36,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:36,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:36,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:36,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:36,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:37,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:40,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:40,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:06:40,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:06:40,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4420 [2020-10-28 00:06:40,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:40,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:06:40,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:06:40,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 00:06:40,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:41,003 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:06:41,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:41,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:41,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:41,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:41,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:41,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:06:41,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:41,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:41,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:41,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:41,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:06:41,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172955329] [2020-10-28 00:06:41,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:06:41,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:06:41,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834974806] [2020-10-28 00:06:41,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:06:41,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:06:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:06:41,028 INFO L87 Difference]: Start difference. First operand 22771 states and 28960 transitions. Second operand 6 states. [2020-10-28 00:06:41,238 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:06:42,049 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:06:44,472 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 00:06:44,669 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:06:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:47,843 INFO L93 Difference]: Finished difference Result 59383 states and 76925 transitions. [2020-10-28 00:06:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:06:47,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 00:06:47,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:47,901 INFO L225 Difference]: With dead ends: 59383 [2020-10-28 00:06:47,902 INFO L226 Difference]: Without dead ends: 49633 [2020-10-28 00:06:47,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:06:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49633 states. [2020-10-28 00:06:52,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49633 to 34908. [2020-10-28 00:06:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34908 states. [2020-10-28 00:06:52,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34908 states to 34908 states and 44277 transitions. [2020-10-28 00:06:52,689 INFO L78 Accepts]: Start accepts. Automaton has 34908 states and 44277 transitions. Word has length 69 [2020-10-28 00:06:52,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:52,690 INFO L481 AbstractCegarLoop]: Abstraction has 34908 states and 44277 transitions. [2020-10-28 00:06:52,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:06:52,690 INFO L276 IsEmpty]: Start isEmpty. Operand 34908 states and 44277 transitions. [2020-10-28 00:06:52,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:06:52,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:52,696 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:06:52,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 00:06:52,696 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:52,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:52,696 INFO L82 PathProgramCache]: Analyzing trace with hash 404383025, now seen corresponding path program 1 times [2020-10-28 00:06:52,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:52,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437501227] [2020-10-28 00:06:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:52,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:52,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:52,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:52,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:53,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:53,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:54,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:57,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:57,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:06:57,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:06:57,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:06:57,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:57,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:06:57,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:06:57,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:06:57,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:57,908 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:06:57,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:57,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:57,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:57,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:57,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:57,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:06:57,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:57,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:57,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437501227] [2020-10-28 00:06:57,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:06:57,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:06:57,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845551887] [2020-10-28 00:06:57,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:06:57,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:57,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:06:57,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:06:57,931 INFO L87 Difference]: Start difference. First operand 34908 states and 44277 transitions. Second operand 6 states. [2020-10-28 00:06:58,127 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:06:59,344 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:06:59,728 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:12,696 INFO L93 Difference]: Finished difference Result 143002 states and 182347 transitions. [2020-10-28 00:07:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:07:12,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 00:07:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:13,002 INFO L225 Difference]: With dead ends: 143002 [2020-10-28 00:07:13,003 INFO L226 Difference]: Without dead ends: 109428 [2020-10-28 00:07:13,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:07:13,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109428 states. [2020-10-28 00:07:25,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109428 to 94821. [2020-10-28 00:07:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94821 states. [2020-10-28 00:07:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94821 states to 94821 states and 120758 transitions. [2020-10-28 00:07:25,778 INFO L78 Accepts]: Start accepts. Automaton has 94821 states and 120758 transitions. Word has length 69 [2020-10-28 00:07:25,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:25,778 INFO L481 AbstractCegarLoop]: Abstraction has 94821 states and 120758 transitions. [2020-10-28 00:07:25,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:25,778 INFO L276 IsEmpty]: Start isEmpty. Operand 94821 states and 120758 transitions. [2020-10-28 00:07:25,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:07:25,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:25,784 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:25,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 00:07:25,785 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:25,785 INFO L82 PathProgramCache]: Analyzing trace with hash -166033556, now seen corresponding path program 1 times [2020-10-28 00:07:25,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:25,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372819777] [2020-10-28 00:07:25,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:25,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:25,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:25,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:26,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:26,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:26,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:26,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:27,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:27,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:27,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:28,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:30,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:30,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:07:30,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:07:30,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:07:30,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:30,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 00:07:30,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:07:30,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:07:30,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:31,325 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:07:31,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:31,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:31,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:31,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:31,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:07:31,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:31,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:31,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:31,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:31,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:31,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372819777] [2020-10-28 00:07:31,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:07:31,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 00:07:31,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336157812] [2020-10-28 00:07:31,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 00:07:31,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:31,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 00:07:31,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:07:31,354 INFO L87 Difference]: Start difference. First operand 94821 states and 120758 transitions. Second operand 12 states. [2020-10-28 00:07:32,060 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 153 [2020-10-28 00:07:32,568 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-28 00:07:32,875 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-28 00:07:33,156 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-28 00:07:33,715 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-28 00:07:35,315 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:35,593 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:07:36,222 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:07:37,856 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-28 00:07:38,459 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-28 00:07:40,460 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-28 00:07:41,339 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-28 00:07:41,886 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 00:07:42,693 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:07:43,546 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-28 00:07:44,374 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-10-28 00:07:44,849 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46