/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:53:28,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:53:28,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:53:28,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:53:28,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:53:28,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:53:28,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:53:28,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:53:28,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:53:28,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:53:28,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:53:28,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:53:28,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:53:28,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:53:28,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:53:28,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:53:28,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:53:28,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:53:28,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:53:28,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:53:28,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:53:28,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:53:28,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:53:28,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:53:28,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:53:28,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:53:28,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:53:28,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:53:28,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:53:28,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:53:28,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:53:28,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:53:28,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:53:28,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:53:28,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:53:28,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:53:28,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:53:28,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:53:28,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:53:28,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:53:28,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:53:28,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:53:28,994 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:53:28,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:53:28,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:53:28,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:53:28,997 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:53:28,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:53:28,998 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:53:28,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:53:28,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:53:28,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:53:28,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:53:28,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:53:28,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:53:29,000 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:53:29,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:53:29,013 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:53:29,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:53:29,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:53:29,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:53:29,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:53:29,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:53:29,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:53:29,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:53:29,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:53:29,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:53:29,016 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:53:29,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:53:29,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:53:29,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:53:29,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:53:29,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:53:29,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:53:29,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:53:29,403 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:53:29,403 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:53:29,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:53:29,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b3031878/ea9904c1287a481e8fdb44c7035d1946/FLAGdf8adc2ba [2020-10-27 05:53:30,180 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:53:30,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:53:30,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b3031878/ea9904c1287a481e8fdb44c7035d1946/FLAGdf8adc2ba [2020-10-27 05:53:30,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b3031878/ea9904c1287a481e8fdb44c7035d1946 [2020-10-27 05:53:30,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:53:30,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:53:30,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:53:30,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:53:30,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:53:30,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:53:30" (1/1) ... [2020-10-27 05:53:30,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48a59d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:30, skipping insertion in model container [2020-10-27 05:53:30,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:53:30" (1/1) ... [2020-10-27 05:53:30,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:53:30,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:53:31,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:53:31,067 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:53:31,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:53:31,264 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:53:31,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:31 WrapperNode [2020-10-27 05:53:31,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:53:31,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:53:31,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:53:31,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:53:31,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:31" (1/1) ... [2020-10-27 05:53:31,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:31" (1/1) ... [2020-10-27 05:53:31,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:31" (1/1) ... [2020-10-27 05:53:31,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:31" (1/1) ... [2020-10-27 05:53:31,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:31" (1/1) ... [2020-10-27 05:53:31,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:31" (1/1) ... [2020-10-27 05:53:31,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:31" (1/1) ... [2020-10-27 05:53:31,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:53:31,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:53:31,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:53:31,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:53:31,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:53:31,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:53:31,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:53:31,488 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:53:31,488 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:53:31,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:53:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:53:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:53:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:53:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:53:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:53:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:53:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:53:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:53:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:53:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:53:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:53:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:53:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:53:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:53:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:53:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:53:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:53:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:53:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:53:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:53:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:53:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:53:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:53:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:53:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:53:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:53:32,598 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:53:32,598 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:53:32,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:53:32 BoogieIcfgContainer [2020-10-27 05:53:32,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:53:32,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:53:32,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:53:32,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:53:32,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:53:30" (1/3) ... [2020-10-27 05:53:32,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3562912e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:53:32, skipping insertion in model container [2020-10-27 05:53:32,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:53:31" (2/3) ... [2020-10-27 05:53:32,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3562912e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:53:32, skipping insertion in model container [2020-10-27 05:53:32,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:53:32" (3/3) ... [2020-10-27 05:53:32,612 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:53:32,623 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:53:32,628 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:53:32,642 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:53:32,670 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:53:32,670 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:53:32,670 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:53:32,671 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:53:32,671 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:53:32,671 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:53:32,671 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:53:32,671 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:53:32,694 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states. [2020-10-27 05:53:32,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 05:53:32,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:32,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:32,707 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:32,714 INFO L82 PathProgramCache]: Analyzing trace with hash -819651216, now seen corresponding path program 1 times [2020-10-27 05:53:32,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:32,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762790010] [2020-10-27 05:53:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:33,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:33,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:34,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:38,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:38,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 05:53:38,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:53:38,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 05:53:38,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:38,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:53:38,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:53:38,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:53:38,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:53:38,808 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:38,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:38,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:38,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:38,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:38,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:38,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:53:38,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:38,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:53:38,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:38,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:53:38,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:53:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:53:38,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762790010] [2020-10-27 05:53:38,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:38,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:53:38,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35735183] [2020-10-27 05:53:38,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:53:38,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:38,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:53:38,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:53:38,991 INFO L87 Difference]: Start difference. First operand 258 states. Second operand 9 states. [2020-10-27 05:53:41,549 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 05:53:41,911 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:53:42,266 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:53:42,710 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-27 05:53:43,120 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:53:43,593 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 05:53:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:45,052 INFO L93 Difference]: Finished difference Result 1144 states and 1882 transitions. [2020-10-27 05:53:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:53:45,055 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 100 [2020-10-27 05:53:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:45,096 INFO L225 Difference]: With dead ends: 1144 [2020-10-27 05:53:45,097 INFO L226 Difference]: Without dead ends: 957 [2020-10-27 05:53:45,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:53:45,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2020-10-27 05:53:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 942. [2020-10-27 05:53:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 942 states. [2020-10-27 05:53:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1436 transitions. [2020-10-27 05:53:45,275 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1436 transitions. Word has length 100 [2020-10-27 05:53:45,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:45,276 INFO L481 AbstractCegarLoop]: Abstraction has 942 states and 1436 transitions. [2020-10-27 05:53:45,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:53:45,277 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1436 transitions. [2020-10-27 05:53:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 05:53:45,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:45,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:45,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:53:45,285 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:45,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1685953688, now seen corresponding path program 1 times [2020-10-27 05:53:45,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:45,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120577488] [2020-10-27 05:53:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:45,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:45,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:45,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:48,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:48,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 05:53:48,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:53:48,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2739 [2020-10-27 05:53:48,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:48,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:53:48,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:53:48,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:53:48,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 05:53:48,547 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:48,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:48,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:48,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:48,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:48,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:48,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-27 05:53:48,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:48,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:48,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:48,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:53:48,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:53:48,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120577488] [2020-10-27 05:53:48,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:48,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:53:48,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423854210] [2020-10-27 05:53:48,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:53:48,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:48,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:53:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:53:48,695 INFO L87 Difference]: Start difference. First operand 942 states and 1436 transitions. Second operand 6 states. [2020-10-27 05:53:49,119 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:53:50,237 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:53:50,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:50,835 INFO L93 Difference]: Finished difference Result 2451 states and 3804 transitions. [2020-10-27 05:53:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:53:50,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-10-27 05:53:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:50,847 INFO L225 Difference]: With dead ends: 2451 [2020-10-27 05:53:50,847 INFO L226 Difference]: Without dead ends: 1576 [2020-10-27 05:53:50,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:53:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2020-10-27 05:53:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1573. [2020-10-27 05:53:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1573 states. [2020-10-27 05:53:51,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 2429 transitions. [2020-10-27 05:53:51,010 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 2429 transitions. Word has length 101 [2020-10-27 05:53:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:51,012 INFO L481 AbstractCegarLoop]: Abstraction has 1573 states and 2429 transitions. [2020-10-27 05:53:51,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:53:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 2429 transitions. [2020-10-27 05:53:51,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 05:53:51,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:51,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:51,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:53:51,025 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:51,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:51,025 INFO L82 PathProgramCache]: Analyzing trace with hash -547446267, now seen corresponding path program 1 times [2020-10-27 05:53:51,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:51,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886978869] [2020-10-27 05:53:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:51,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:51,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:51,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:53,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:53,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 05:53:53,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:53:53,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2295 [2020-10-27 05:53:53,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:53:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:53:53,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:53:53,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:53,815 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:53,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:53,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:53,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:53,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:53,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:53,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:53:53,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:53:53,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:53:53,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886978869] [2020-10-27 05:53:53,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:53,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:53:53,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019587576] [2020-10-27 05:53:53,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:53:53,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:53,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:53:53,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:53:53,899 INFO L87 Difference]: Start difference. First operand 1573 states and 2429 transitions. Second operand 6 states. [2020-10-27 05:53:54,278 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:53:55,410 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:53:56,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:56,040 INFO L93 Difference]: Finished difference Result 4070 states and 6364 transitions. [2020-10-27 05:53:56,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:53:56,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-10-27 05:53:56,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:56,056 INFO L225 Difference]: With dead ends: 4070 [2020-10-27 05:53:56,056 INFO L226 Difference]: Without dead ends: 2654 [2020-10-27 05:53:56,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:53:56,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2020-10-27 05:53:56,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2651. [2020-10-27 05:53:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2651 states. [2020-10-27 05:53:56,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 4115 transitions. [2020-10-27 05:53:56,248 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 4115 transitions. Word has length 101 [2020-10-27 05:53:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:56,248 INFO L481 AbstractCegarLoop]: Abstraction has 2651 states and 4115 transitions. [2020-10-27 05:53:56,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:53:56,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 4115 transitions. [2020-10-27 05:53:56,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 05:53:56,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:56,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:56,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:53:56,252 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:56,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:56,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1697002540, now seen corresponding path program 1 times [2020-10-27 05:53:56,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:56,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390024026] [2020-10-27 05:53:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:56,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:56,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:56,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:58,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:58,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 05:53:58,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:53:58,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1971 [2020-10-27 05:53:58,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:53:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:53:58,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 05:53:58,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:58,638 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:53:58,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:58,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:58,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:58,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:58,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:58,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 05:53:58,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:58,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:58,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:58,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:53:58,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:53:58,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390024026] [2020-10-27 05:53:58,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:53:58,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:53:58,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013618836] [2020-10-27 05:53:58,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:53:58,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:58,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:53:58,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:53:58,727 INFO L87 Difference]: Start difference. First operand 2651 states and 4115 transitions. Second operand 6 states. [2020-10-27 05:53:59,132 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:54:00,230 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 05:54:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:01,071 INFO L93 Difference]: Finished difference Result 7253 states and 11381 transitions. [2020-10-27 05:54:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:54:01,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-10-27 05:54:01,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:01,097 INFO L225 Difference]: With dead ends: 7253 [2020-10-27 05:54:01,097 INFO L226 Difference]: Without dead ends: 4800 [2020-10-27 05:54:01,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:54:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4800 states. [2020-10-27 05:54:01,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4800 to 4797. [2020-10-27 05:54:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4797 states. [2020-10-27 05:54:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4797 states to 4797 states and 7487 transitions. [2020-10-27 05:54:01,448 INFO L78 Accepts]: Start accepts. Automaton has 4797 states and 7487 transitions. Word has length 101 [2020-10-27 05:54:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:01,449 INFO L481 AbstractCegarLoop]: Abstraction has 4797 states and 7487 transitions. [2020-10-27 05:54:01,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:54:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4797 states and 7487 transitions. [2020-10-27 05:54:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 05:54:01,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:01,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:54:01,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:54:01,453 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1889602614, now seen corresponding path program 1 times [2020-10-27 05:54:01,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:01,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531545751] [2020-10-27 05:54:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:01,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:01,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:01,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:03,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:03,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 05:54:03,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:54:03,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2151 [2020-10-27 05:54:03,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:03,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:54:03,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:54:03,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:54:03,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:04,046 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:04,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:04,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:04,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:04,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:04,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:04,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 05:54:04,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:04,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:04,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:04,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:54:04,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:54:04,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531545751] [2020-10-27 05:54:04,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:04,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:54:04,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766413073] [2020-10-27 05:54:04,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:54:04,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:04,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:54:04,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:54:04,131 INFO L87 Difference]: Start difference. First operand 4797 states and 7487 transitions. Second operand 6 states. [2020-10-27 05:54:04,494 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:54:05,663 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:54:06,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:06,694 INFO L93 Difference]: Finished difference Result 13785 states and 21591 transitions. [2020-10-27 05:54:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:54:06,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-10-27 05:54:06,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:06,741 INFO L225 Difference]: With dead ends: 13785 [2020-10-27 05:54:06,741 INFO L226 Difference]: Without dead ends: 9108 [2020-10-27 05:54:06,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:54:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9108 states. [2020-10-27 05:54:07,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9108 to 9105. [2020-10-27 05:54:07,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9105 states. [2020-10-27 05:54:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9105 states to 9105 states and 14182 transitions. [2020-10-27 05:54:07,427 INFO L78 Accepts]: Start accepts. Automaton has 9105 states and 14182 transitions. Word has length 101 [2020-10-27 05:54:07,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:07,429 INFO L481 AbstractCegarLoop]: Abstraction has 9105 states and 14182 transitions. [2020-10-27 05:54:07,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:54:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 9105 states and 14182 transitions. [2020-10-27 05:54:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 05:54:07,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:07,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:54:07,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:54:07,436 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1268304487, now seen corresponding path program 1 times [2020-10-27 05:54:07,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:07,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102975290] [2020-10-27 05:54:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:07,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:07,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:07,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:09,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:09,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 05:54:09,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:54:09,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1971 [2020-10-27 05:54:09,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:09,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:54:09,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:54:09,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 05:54:09,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:09,906 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:09,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:09,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:09,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:09,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:09,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:09,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:54:09,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:09,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:09,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:09,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:54:09,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:54:09,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102975290] [2020-10-27 05:54:09,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:09,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:54:09,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948906814] [2020-10-27 05:54:09,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:54:09,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:09,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:54:09,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:54:09,988 INFO L87 Difference]: Start difference. First operand 9105 states and 14182 transitions. Second operand 6 states. [2020-10-27 05:54:10,369 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:54:11,555 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:54:12,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:12,869 INFO L93 Difference]: Finished difference Result 26719 states and 41660 transitions. [2020-10-27 05:54:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:54:12,871 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-10-27 05:54:12,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:12,933 INFO L225 Difference]: With dead ends: 26719 [2020-10-27 05:54:12,933 INFO L226 Difference]: Without dead ends: 17704 [2020-10-27 05:54:12,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:54:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17704 states. [2020-10-27 05:54:14,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17704 to 17701. [2020-10-27 05:54:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17701 states. [2020-10-27 05:54:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17701 states to 17701 states and 27434 transitions. [2020-10-27 05:54:14,447 INFO L78 Accepts]: Start accepts. Automaton has 17701 states and 27434 transitions. Word has length 101 [2020-10-27 05:54:14,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:14,448 INFO L481 AbstractCegarLoop]: Abstraction has 17701 states and 27434 transitions. [2020-10-27 05:54:14,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:54:14,448 INFO L276 IsEmpty]: Start isEmpty. Operand 17701 states and 27434 transitions. [2020-10-27 05:54:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 05:54:14,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:14,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:54:14,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:54:14,457 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:14,457 INFO L82 PathProgramCache]: Analyzing trace with hash 344924773, now seen corresponding path program 1 times [2020-10-27 05:54:14,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:14,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59041983] [2020-10-27 05:54:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:14,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:14,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:14,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:15,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:18,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:18,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 05:54:18,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:54:18,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4292 [2020-10-27 05:54:18,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:18,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:54:18,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:54:18,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 05:54:18,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:19,312 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:19,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:19,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:19,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:19,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:19,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:19,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 05:54:19,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:19,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:19,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:19,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:54:19,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:54:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:54:19,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59041983] [2020-10-27 05:54:19,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:19,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:54:19,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130972873] [2020-10-27 05:54:19,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:54:19,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:19,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:54:19,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:54:19,458 INFO L87 Difference]: Start difference. First operand 17701 states and 27434 transitions. Second operand 11 states. [2020-10-27 05:54:20,017 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-27 05:54:22,393 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:54:22,826 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:54:29,401 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:54:34,168 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-27 05:54:35,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:35,439 INFO L93 Difference]: Finished difference Result 181765 states and 282554 transitions. [2020-10-27 05:54:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 05:54:35,440 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 102 [2020-10-27 05:54:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:36,089 INFO L225 Difference]: With dead ends: 181765 [2020-10-27 05:54:36,089 INFO L226 Difference]: Without dead ends: 167174 [2020-10-27 05:54:36,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 05:54:36,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167174 states. [2020-10-27 05:54:39,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167174 to 17855. [2020-10-27 05:54:39,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17855 states. [2020-10-27 05:54:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17855 states to 17855 states and 27636 transitions. [2020-10-27 05:54:39,407 INFO L78 Accepts]: Start accepts. Automaton has 17855 states and 27636 transitions. Word has length 102 [2020-10-27 05:54:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:54:39,407 INFO L481 AbstractCegarLoop]: Abstraction has 17855 states and 27636 transitions. [2020-10-27 05:54:39,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:54:39,407 INFO L276 IsEmpty]: Start isEmpty. Operand 17855 states and 27636 transitions. [2020-10-27 05:54:39,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 05:54:39,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:39,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:54:39,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:54:39,415 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:39,416 INFO L82 PathProgramCache]: Analyzing trace with hash 2089834373, now seen corresponding path program 1 times [2020-10-27 05:54:39,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:39,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111252145] [2020-10-27 05:54:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:39,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:39,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:40,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:40,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:42,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:42,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 05:54:42,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:54:42,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3490 [2020-10-27 05:54:42,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:42,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:54:42,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:54:42,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 05:54:42,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:43,542 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:54:43,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:54:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:43,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:54:43,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:54:43,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:54:43,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:54:43,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:54:43,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:54:43,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:54:43,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:54:43,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:54:43,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:54:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:54:43,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111252145] [2020-10-27 05:54:43,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:54:43,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:54:43,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907686476] [2020-10-27 05:54:43,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:54:43,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:54:43,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:54:43,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:54:43,645 INFO L87 Difference]: Start difference. First operand 17855 states and 27636 transitions. Second operand 11 states. [2020-10-27 05:54:44,159 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-27 05:54:46,396 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:54:46,870 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:54:52,171 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:54:58,227 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-27 05:55:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:02,484 INFO L93 Difference]: Finished difference Result 130067 states and 201556 transitions. [2020-10-27 05:55:02,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 05:55:02,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 102 [2020-10-27 05:55:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:02,932 INFO L225 Difference]: With dead ends: 130067 [2020-10-27 05:55:02,932 INFO L226 Difference]: Without dead ends: 123776 [2020-10-27 05:55:02,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=441, Invalid=1815, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 05:55:03,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123776 states. [2020-10-27 05:55:05,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123776 to 18143. [2020-10-27 05:55:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18143 states. [2020-10-27 05:55:05,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18143 states to 18143 states and 28052 transitions. [2020-10-27 05:55:05,671 INFO L78 Accepts]: Start accepts. Automaton has 18143 states and 28052 transitions. Word has length 102 [2020-10-27 05:55:05,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:05,672 INFO L481 AbstractCegarLoop]: Abstraction has 18143 states and 28052 transitions. [2020-10-27 05:55:05,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:55:05,672 INFO L276 IsEmpty]: Start isEmpty. Operand 18143 states and 28052 transitions. [2020-10-27 05:55:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 05:55:05,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:05,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:05,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:55:05,680 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:05,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1039504357, now seen corresponding path program 1 times [2020-10-27 05:55:05,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:05,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595675786] [2020-10-27 05:55:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:05,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:05,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:05,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:06,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:08,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:08,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 05:55:08,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:55:08,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3134 [2020-10-27 05:55:08,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:08,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:55:08,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:55:08,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 05:55:08,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:09,344 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:55:09,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:09,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:09,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:09,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:09,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:09,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 05:55:09,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:09,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:09,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:09,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:55:09,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:09,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595675786] [2020-10-27 05:55:09,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:09,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:55:09,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283691267] [2020-10-27 05:55:09,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:55:09,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:09,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:55:09,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:55:09,461 INFO L87 Difference]: Start difference. First operand 18143 states and 28052 transitions. Second operand 11 states. [2020-10-27 05:55:09,897 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 05:55:12,875 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:55:13,315 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:55:19,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:19,426 INFO L93 Difference]: Finished difference Result 44697 states and 68748 transitions. [2020-10-27 05:55:19,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:55:19,427 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 102 [2020-10-27 05:55:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:19,488 INFO L225 Difference]: With dead ends: 44697 [2020-10-27 05:55:19,488 INFO L226 Difference]: Without dead ends: 42794 [2020-10-27 05:55:19,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:55:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42794 states. [2020-10-27 05:55:21,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42794 to 18143. [2020-10-27 05:55:21,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18143 states. [2020-10-27 05:55:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18143 states to 18143 states and 28048 transitions. [2020-10-27 05:55:21,918 INFO L78 Accepts]: Start accepts. Automaton has 18143 states and 28048 transitions. Word has length 102 [2020-10-27 05:55:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:21,918 INFO L481 AbstractCegarLoop]: Abstraction has 18143 states and 28048 transitions. [2020-10-27 05:55:21,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:55:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 18143 states and 28048 transitions. [2020-10-27 05:55:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 05:55:21,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:21,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:21,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:55:21,930 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:21,930 INFO L82 PathProgramCache]: Analyzing trace with hash 799202085, now seen corresponding path program 1 times [2020-10-27 05:55:21,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:21,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783038316] [2020-10-27 05:55:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:21,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:22,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:22,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:22,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:25,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:25,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 05:55:25,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:55:25,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3428 [2020-10-27 05:55:25,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:25,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:55:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:55:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 05:55:25,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:25,913 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:55:25,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:25,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:25,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:25,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:25,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:25,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:55:25,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:25,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:25,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:25,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:55:25,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:25,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783038316] [2020-10-27 05:55:25,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:25,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:55:25,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654527271] [2020-10-27 05:55:25,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:55:25,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:25,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:55:25,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:55:25,980 INFO L87 Difference]: Start difference. First operand 18143 states and 28048 transitions. Second operand 11 states. [2020-10-27 05:55:26,423 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:55:29,170 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 05:55:29,611 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:55:36,709 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:55:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:44,725 INFO L93 Difference]: Finished difference Result 118890 states and 184504 transitions. [2020-10-27 05:55:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:55:44,727 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 102 [2020-10-27 05:55:44,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:44,872 INFO L225 Difference]: With dead ends: 118890 [2020-10-27 05:55:44,873 INFO L226 Difference]: Without dead ends: 109635 [2020-10-27 05:55:44,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:55:45,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109635 states. [2020-10-27 05:55:48,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109635 to 18515. [2020-10-27 05:55:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18515 states. [2020-10-27 05:55:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18515 states to 18515 states and 28550 transitions. [2020-10-27 05:55:48,456 INFO L78 Accepts]: Start accepts. Automaton has 18515 states and 28550 transitions. Word has length 102 [2020-10-27 05:55:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:48,457 INFO L481 AbstractCegarLoop]: Abstraction has 18515 states and 28550 transitions. [2020-10-27 05:55:48,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:55:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 18515 states and 28550 transitions. [2020-10-27 05:55:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 05:55:48,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:48,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:48,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:55:48,465 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:48,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1853546811, now seen corresponding path program 1 times [2020-10-27 05:55:48,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:48,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135063671] [2020-10-27 05:55:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:48,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:48,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:48,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:48,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:51,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:51,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 05:55:51,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:55:51,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2784 [2020-10-27 05:55:51,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:51,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:55:51,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:55:51,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 05:55:51,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:51,824 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:55:51,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:51,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:51,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:51,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:51,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:51,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:55:51,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:51,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:51,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:51,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:55:51,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:51,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135063671] [2020-10-27 05:55:51,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:51,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:55:51,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674131329] [2020-10-27 05:55:51,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:55:51,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:51,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:55:51,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:55:51,895 INFO L87 Difference]: Start difference. First operand 18515 states and 28550 transitions. Second operand 11 states. [2020-10-27 05:55:52,319 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-27 05:55:55,785 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:55:56,183 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:55:57,083 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 210 [2020-10-27 05:56:11,096 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 208 [2020-10-27 05:56:21,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:21,105 INFO L93 Difference]: Finished difference Result 158569 states and 246306 transitions. [2020-10-27 05:56:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 05:56:21,105 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 102 [2020-10-27 05:56:21,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:21,324 INFO L225 Difference]: With dead ends: 158569 [2020-10-27 05:56:21,324 INFO L226 Difference]: Without dead ends: 146446 [2020-10-27 05:56:21,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=435, Invalid=1635, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 05:56:21,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146446 states. [2020-10-27 05:56:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146446 to 19073. [2020-10-27 05:56:25,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19073 states. [2020-10-27 05:56:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19073 states to 19073 states and 29289 transitions. [2020-10-27 05:56:25,222 INFO L78 Accepts]: Start accepts. Automaton has 19073 states and 29289 transitions. Word has length 102 [2020-10-27 05:56:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:25,223 INFO L481 AbstractCegarLoop]: Abstraction has 19073 states and 29289 transitions. [2020-10-27 05:56:25,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:56:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 19073 states and 29289 transitions. [2020-10-27 05:56:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 05:56:25,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:25,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:25,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:56:25,232 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:25,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2077298296, now seen corresponding path program 1 times [2020-10-27 05:56:25,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:25,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798774546] [2020-10-27 05:56:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:25,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:25,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:25,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:26,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:26,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 05:56:26,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:56:26,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1512 [2020-10-27 05:56:26,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:26,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:56:26,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:56:26,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:56:26,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:27,172 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:56:27,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:27,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:27,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:27,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:27,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:27,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:56:27,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:27,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:56:27,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:27,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:56:27,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:56:27,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798774546] [2020-10-27 05:56:27,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:27,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:56:27,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620964616] [2020-10-27 05:56:27,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:56:27,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:27,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:56:27,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:56:27,221 INFO L87 Difference]: Start difference. First operand 19073 states and 29289 transitions. Second operand 6 states. [2020-10-27 05:56:27,614 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 05:56:29,802 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:56:35,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:35,419 INFO L93 Difference]: Finished difference Result 56223 states and 86482 transitions. [2020-10-27 05:56:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:56:35,420 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-27 05:56:35,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:35,460 INFO L225 Difference]: With dead ends: 56223 [2020-10-27 05:56:35,460 INFO L226 Difference]: Without dead ends: 37233 [2020-10-27 05:56:35,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:56:35,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37233 states. [2020-10-27 05:56:41,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37233 to 37230. [2020-10-27 05:56:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37230 states. [2020-10-27 05:56:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37230 states to 37230 states and 57091 transitions. [2020-10-27 05:56:41,528 INFO L78 Accepts]: Start accepts. Automaton has 37230 states and 57091 transitions. Word has length 102 [2020-10-27 05:56:41,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:41,528 INFO L481 AbstractCegarLoop]: Abstraction has 37230 states and 57091 transitions. [2020-10-27 05:56:41,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:56:41,529 INFO L276 IsEmpty]: Start isEmpty. Operand 37230 states and 57091 transitions. [2020-10-27 05:56:41,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 05:56:41,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:41,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:41,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:56:41,540 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:41,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:41,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1063596942, now seen corresponding path program 1 times [2020-10-27 05:56:41,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:41,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723762774] [2020-10-27 05:56:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:41,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:41,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:42,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:42,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 05:56:42,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:56:42,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-27 05:56:42,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:56:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:56:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 05:56:42,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:42,608 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:56:42,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:42,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:42,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:42,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:42,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:42,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:56:42,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:42,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:42,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:42,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:42,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:56:42,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723762774] [2020-10-27 05:56:42,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:42,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:56:42,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641559059] [2020-10-27 05:56:42,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:56:42,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:42,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:56:42,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:56:42,662 INFO L87 Difference]: Start difference. First operand 37230 states and 57091 transitions. Second operand 9 states. [2020-10-27 05:56:43,242 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:56:47,042 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 05:56:47,600 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-27 05:56:48,052 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 05:56:48,459 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 05:56:48,918 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 201